700mhz wall on HD4850 is smashed.

[jimmyz]

First a disclaimer:

I am offering this info to help, there is alot of risk involved with the solution I have found.





OK where to start, I have been searching high and low for a way to get past the 700mhz "wall" that is imposed by CCC. currently there is only 1 known tool that can clock a 4XXX series GPU beyond 700mhz it is the AMD GPU TOOL, however the edition that is needed for HD48XX's is not publicly available ..yet. ;)

I have been in contact with lots of people who have worked very hard on this issue, and most don't even have a card to test with , so I have been their Guinnea pig , so to speak.

I tried all of the usual suspects and found none able to raise the speeds properly. I even flashed bios's repeatedly with no change.Then W1zzard put me in contact with BAGZZlash, who is an author of RBE. or Radeon Bios Editor. I had tried it several times and while it could identify and modify the bios's it would not take effect once flashed to the card.

Today BAGZZlash and I chatted on MSN Messenger and he asked me to change all of the clockss in the settings tab, which I did (2-d as well as 3-d). and It worked!!! I have had many issues throughout the day with it but the flashing and changing has been easy. the hard part is the fact that once you raise the voltage the lack of powerplay rears it's head. I was experiencing graphics corruption, reboots etc. all after sucessfully completing a bench. when it is time for the driver to drop back to 2-d it doesn't like the core being so high.

750mhz needs about 1.35v or more to pass crysis bench, also the 3DMark stuff. but Grid was fine with less voltage. at 800 it can run the benches but when it ends the screen gets corrupted......scary, if you've ever lost a card you'll know what I mean. and to get 800 I needed 1.5v which I believe is the reason for the 4870 using a higher quality power circuit.

Water cooling is a must for this procedure. these little buggers get hot, and increasing the voltage makes them immediately unstable unless you can keep them cool. I am using Danger Den Maze 4's and a d-5 pump along with a 120.2 rad all in my case. they fit fine just like the 3850's, the shim is not an issue for these and most common blocks.

I'd like to keep this thread for people to post up their findings. we will soon have software to clock with but in the mean time this is it. and it has risks involved. make sure you have a way to flash back in case you get a corrupted flash or something is set too high.

this thread is useless without pics so here is one, keep in mind this is not a great score, no tweaks just raw clocks. I am on a very bloated install of XP while I do my testing,The best I will save for HWBOT..:up:

http://img53.imageshack.us/img53/3285/3080505750coreos2.jpg

so basically here is the procedure:

1. save your original bios. GPU-Z is what I used to extract the bios. I make several copies including 1 I saved on a flashdrive.
2. open the bios file with RBE. then mod all of the clocks in the clocks tab (obviously not all need modded but it is what it took for mine to work.) this thread is to find out which ones will need to be changed and which won't!. I CAN ONLY TEST SO FAST BUT WITH SEVERAL OF US WE SHOULD BE ABLE TO NAIL THIS DOWN SOON.
3. save the file after it is modded.
4. Use winflash to flash the newly modded bios, reboot and test.

This is still in the trial and error stage, please don't flash unless you are aware of the risks. I appologize in advance if anyone damages their card attempting this.

I debated on wether or not to post this without having the bugs ironed out, but I knew that many testers would be better than just one.


Here is what you will need:

GPU-Z 0.2.4 : http://www.techpowerup.com/downloads/SysInfo/GPU-Z/

K404's volt mod thread: http://www.xtremesystems.org/forums/showthread.php?t=190990

RBE , latest: http://www.techpowerup.com/downloads/Utilities/RBE/old/

winflash latest : http://www.techpowerup.com/downloads/1062/Winflash_2.0.1.1.html

Many thanks to W1zzard , Crackerjack, BAGZZlash, K404 and I know I am forgetting some but I can edit them in later:D

[Miwo]

Subscribed :)
Thanks again for the good work and findings. Perhaps someone will find a way to lock voltages without powerplay kicking in so you can operate in 3D Voltages all the time and won't experience that corruption issue. I know Rivatuner does this as soon as you change the clockspeed with the 3870, but unforutunately it will not be updated until towards the end of July according to Unwinder. Can't wait to see some more benches @ 750MHz core, so we'll know just how much memory bandwidth improves things on the 4870.

[purecain]

absolutely amazed, thankyou for your hard work...

[[XC] gomeler]

Glad to see a hack is available, next up will be getting those 2D and 3D clocks to work. Wonder what it'll take to break the 1GHz barrier..

[JamesBong420]

well im on x64 and winflash does not work.

so i tried atiflash. i get an error and says no adaptor found. =\ i shall try more.. :yepp:

and jimmyz a big :up :D to you and thanks.. :clap:

[JamesBong420]

ok so if your runing x64 use 2.0.0.7 it will work..... i still have to flash though.

EDIT:
ok i have some good news and some bad news. i will start with the bad DONT USE WINFLASH!!!!!! :banana::banana::banana::banana:ed the card... BUT i found that 3.59 of atiflash works perfect.. got the card alive again... so flash away safely..
http://www.techpowerup.com/downloads/1061/ATIFlash_3.59.html

EDIT 2: ok i had to change allmy clocks in RBE before it actually worked. i will start over on a new bios to try some more combos..... 720 mhz core 1.2v 3d03 47.9k 4.4ghz cpu just keeping an update for u all..

[jimmyz]

Subscribed :)
Thanks again for the good work and findings. Perhaps someone will find a way to lock voltages without powerplay kicking in so you can operate in 3D Voltages all the time and won't experience that corruption issue. I know Rivatuner does this as soon as you change the clockspeed with the 3870, but unforutunately it will not be updated until towards the end of July according to Unwinder. Can't wait to see some more benches @ 750MHz core, so we'll know just how much memory bandwidth improves things on the 4870.

mine is hard modded, I did both cards. I hard mod the voltages when i fix up a card.

[Miwo]

First a disclaimer:

Today BAGZZlash and I chatted on MSN Messenger and he asked me to change all of the clockss in the settings tab, which I did (2-d as well as 3-d). and It worked!!! I have had many issues throughout the day with it but the flashing and changing has been easy. the hard part is the fact that once you raise the voltage the lack of powerplay rears it's head. I was experiencing graphics corruption, reboots etc. all after sucessfully completing a bench. when it is time for the driver to drop back to 2-d it doesn't like the core being so high.


mine is hard modded, I did both cards. I hard mod the voltages when i fix up a card.



I know that you have your card vmodded, i have been following your threads very closely :) . Let me try to explain where I am coming from on the 2D-3D Voltages part since I have a vmodded 3870 that should behave similarly in a sense.

If the 4850 behaves any similarly, when you measure vGPU when you are out of windows, say in your BIOS.... you are actually reading the 3D Voltages, 1.35v in your case. When you get into Windows, you get a voltage drop because it is in 2D mode.

Now from what you wrote in your first post, your 2D/3D clocks are both the same. So when you drop out of 3DMark, you are still at the same freqency, but under lower voltages. Thats probably why you have the corruption.

On my RV670, powerplay becomes permanently disabled as soon as the slightest clock change is made from Rivatuner. It will be in 3D Voltage all the time and remain in 3D Clocks. That is why I made the comment on locking down voltages. Even if you have it hardmodded, you still experience the voltage drop in 2D. Again, I do not have a RV770 card yet, but since the 4850 shares the same PCB and Powerplay is behaving in a similar fashion, it sounds like the problem you are running into. And of course, we dont have Rivatuner this time around yet

Keep up the great work :)

[Devious]

*subscribed* :)

[gurusan]

...I completed the crysis bench at 1.38v 810mhz...and can get 750mhz stable with only 1.23v. I'm using the stock cooler as well. I don't know if you got a bad card? Or I got a good one or what? I have been adjusting voltage with a pencil mod btw, not through the bios as the hex values did not make sense to me.


http://img168.imageshack.us/img168/6305/32runkt4.png

[JamesBong420]

cant wait to get home from work. all i want to do is play with the card.. :D:yepp: this s1 is going to love more heat. 41c load with 1.2v

[albon]

...I completed the crysis bench at 1.38v 810mhz...and can get 750mhz stable with only 1.23v. I'm using the stock cooler as well. I don't know if you got a bad card? Or I got a good one or what? I have been adjusting voltage with a pencil mod btw, not through the bios as the hex values did not make sense to me.

Do you lose the 2D/3D frequency switching when you flash the bios ?

[gurusan]

Do you lose the 2D/3D frequency switching when you flash the bios ?

no. I edited the tables manually with a hex editor and flashed with atiflash though

[albon]

But you edited only the 3D clocks, right ?
I'm asking this because the newest official bios for 4850 makes it run cooler in 2D mode with 160/500 frequencies, so keeping the ability to switch to these on idle is quite important to me.

[gurusan]

160/500?

Mine is 500/750 core/mem in 2d mode. I am using the asus bios, but my HIS bios is the same as well.

[albon]

You didnt answer to my question :)
Some MSI cards have newer bios, you need 8.6 hotfix aswell to have these lower frequencies kick in in 2D.
http://www.techpowerup.com/vgabios/index.php?page=1&architecture=ATI&manufacturer=&model=HD+4850&interface=&memSize=0

[gurusan]

yes i only edited the 3d clocks...and I have the same bios version as the msi bios (the HIS one on the techpowerup database is mine, and I am using the Asus one from there as well)

[albon]

If you mod the newer bios, could you post it here pls :)
And about your pencil mod, why is there a 100k resistor to solder? I don't understand, do I have to both solder a resistor and shade 2 contact points?

[gurusan]

I re-used the hardmod drawing...so you only need to pencil, no soldering.

And why don't you try editing the MSI bios yourself with the RBE tool ?

[albon]

Problem is I got no spare card to flash back in case of problem :D

[XCheater]

hello everybody i'm new here
hey I see someone overclocks 4850 with stock cooler
how do you do that? all I see is 80 degrees celcius after doing devil may cry 4 benchmark so I think it wouldn't be possible

[[XC] gomeler]

Slow down guys, give me a chance to get some cards :D

[xoqolatl]

yes i only edited the 3d clocks...and I have the same bios version as the msi bios (the HIS one on the techpowerup database is mine, and I am using the Asus one from there as well)

ASUS bios is from me :D I'm using MSI 011.004 but on stock volts I can't even do 670MHz, I get lots of driver crashes. How far can you go on stock volts?

[Clemmaster]

680 for me, now 700 with pencilmod without any issues and fan set to 49% (<74°C on crysis benchmark)

[Devious]

keep it up guys, the HD4850 is looking more promising over the HD4870 :D

[DemonEyez]

160/500?

Mine is 500/750 core/mem in 2d mode. I am using the asus bios, but my HIS bios is the same as well.
He's right, the new MSI bios is version 011.004 and not 011.003 like your HIS and Asus bios.
It differs from the HIS and Asus (and other 003 biosses) that in 2d mode, the clocks are 160/500 and not 500/750. I think this is a better adaptation of Powerplay, I wouldn't be surprised if with this new 004 bios, the card only uses around 25W in idle mode

Just flashed the MSI 011.004 bios into my Asus. Just like the Asus 011.003 bios I can still run 700/2300 without errors/artefacts.
Right now I'm modding the MSI bios for higher 3D clocks, just to see if I can do 705MHz on the core.

[gurusan]

ASUS bios is from me :D I'm using MSI 011.004 but on stock volts I can't even do 670MHz, I get lots of driver crashes. How far can you go on stock volts?

I can do 700mhz on the core no problem with stock volts. I haven't tried the MSI yet because I am using the stock cooler temporarily and need the asus fan control.

[DemonEyez]

Modded my MSI bios 011.004 bios with succes. :D
Right now i'm at 710/1125 with stock voltage but with watercooling.

http://img261.imageshack.us/img261/193/moddedet1.jpg

[JamesBong420]

im hoping some 900 mhz ownage.. imma pound some volts into her tonight. .......:cool:

[gurusan]

nice demoneyes....and very nice idle temp! :D

........and 900mhz would be sweetness. Good luck on that james and keep us posted.

[albon]

Keep in mind that 160 remains in new bios as long as Overdrive is Off. If you enable Overdrive the minimum frequency raises to 500, so overclock is only possible through bios modding if you wanna keep low 2D temps.

[Errik89]

there is a new version of RBE that are able to modify fan speed for 4850 and the 3d voltage??

I've a gigabyte 4850 with asus bios (for use smart doctor to control the fan) but my card with stock voltage can be overclocked only up to 675/1050, so I want to do pencil mod and then overclock my card up to 725/1050 or 750/1050. But I'm not able to use an hex editor so I need RBE... :D

[Caped Crusader]

Modded my MSI bios 011.004 bios with succes. :D
Right now i'm at 710/1125 with stock voltage but with watercooling.

http://img261.imageshack.us/img261/193/moddedet1.jpg

dude! can I get a copy of that modded BIOS? I have a SAPPHIRE HD4850 with BIOS ver. 011.003

I can give you a copy of my BIOS as well, if you'd rather mod mine :)
thanks in advance!

here's my card BIOS for all of you: http://www.monocromatica.com/fez/RV770_SAPPHIRE.bin

Peace :)

[eddieobscurant]

i'd like your modded bios too. I've got the same card as caped crusader.

[jimmyz]

there is a new version of RBE that are able to modify fan speed for 4850 and the 3d voltage??

I've a gigabyte 4850 with asus bios (for use smart doctor to control the fan) but my card with stock voltage can be overclocked only up to 675/1050, so I want to do pencil mod and then overclock my card up to 725/1050 or 750/1050. But I'm not able to use an hex editor so I need RBE... :D



That is in the works, talked to him this morning. keep checking back, also I am considering posting some modded bios's in the first link if somebody has made some good ones, or ones that will raise the ccc limit like some of the 3850 bios's would.

Edited: W1zzard posted in TPU's RBE thread, confirms a new version is in the works and it includes fan control. http://forums.techpowerup.com/showpost.php?p=855292&postcount=270

[JamesBong420]

im at 875 mhz so far just put her at 1.51v to give me some headroom...

850 only needs 1.41v and its totally stable... BBL with an update:yepp::up:

[adpr_02]

Wow:shocked:. What cooling are you using? I wonder if that makes it better than a 4870....

Edit: Is there going to be a way to raise voltages and clocks through ATITOOL like I am able to now with my x1800xl? It is amazing being able to tweak it by just moving my mouse.

[JamesBong420]

900 mhz on an accelero S1 1.51v i have not tried for more.. almost 50k in 03 VERY bloated install.. :up::up:
http://www.hwbot.org/result.do?resultId=748596

[Battlestar]

Modded my MSI bios 011.004 bios with succes. :D
Right now i'm at 710/1125 with stock voltage but with watercooling.

http://img261.imageshack.us/img261/193/moddedet1.jpg

Dude, Can I have a copy of your BIOS? Thanks

-battlestar

[BAGZZlash]

Hi everybody! Jimmyz, thanks for the invitation! :)
Okay, RBE v1.11 with fan support can be expected shortly, maybe today.

[gurusan]

900 mhz on an accelero S1 1.51v i have not tried for more.. almost 50k in 03 VERY bloated install.. :up::up:
http://www.hwbot.org/result.do?resultId=748596

Very impressive, and very well done!!!!!!!

[XCheater]

900 mhz on an accelero S1 1.51v i have not tried for more.. almost 50k in 03 VERY bloated install.. :up::up:
http://www.hwbot.org/result.do?resultId=748596

how do you do that? :shocked: let me know?
the tutorial please ;)

[XMoA]

900 mhz on an accelero S1 1.51v i have not tried for more.. almost 50k in 03 VERY bloated install.. :up::up:
http://www.hwbot.org/result.do?resultId=748596

super! nice nice!

what temps?...
is it stable :P ?

i will get one 4850 too! 625>900MHZ CORE ! almost 50% !!!!

[jimmyz]

Hi everybody! Jimmyz, thanks for the invitation! :)
Okay, RBE v1.11 with fan support can be expected shortly, maybe today.



Sweet now we have the author here!!! now to just get Gomeler to hurry up and get cards and we'll have a hell of a shootout.

[[XC] gomeler]

900 mhz on an accelero S1 1.51v i have not tried for more.. almost 50k in 03 VERY bloated install.. :up::up:
http://www.hwbot.org/result.do?resultId=748596

This frequency to voltage scaling makes me very happy. 1.65v for 1050Mhz I suspect, JUST like RV670 :up: Go for that 1GHz on air JamesBong :D Have 2 cards by chance? Hope to see 110k 01, 100k 03, ~38k 05, and 30k 06 :cool:

Sweet now we have the author here!!! now to just get Gomeler to hurry up and get cards and we'll have a hell of a shootout.

Maybe next week ;)

[DemonEyez]

@Caped Crusader
@eddieobscurant
@Battlestar
Concering those bios requests: I'll post rapid share links this afternoon. Right now I'm at work.
Important!, I use watercooling. I wouldn't recommend going above 700MHz with the stock cooler

Did some further testing last night, but it seems that 710MHz on the core is the max with stock voltage for me.
715MHz gives me artefacts in AtiTool after 1 minute or so.
But I encountered something else.
It seems that the speedsteps for the overclocking the memory becomes rather large after a certain threshold.

When I set 1125MHz in bios, GPU-Z reports 1125MHz being used correctly
When I set 1135MHz in bios, GPU-Z reports 1125MHz being used
When I set 1140MHz in bios, GPU-Z reports 1125MHz being used
When I set 1145MHz in bios, GPU-Z reports 1125MHz being used
I recall I don't have that problem with Overdrive. When I set 1140MHz in Overdrive, GPU reports 1140MHz.

What's that about? Does driver level overclocking allow for smaller steps concerning mem speeds?


*edit* found something about the changing steps in a MSI HD4850 review on Techpowerup.com:

When changing memory clocks I noticed that the step size (with the software I used) is 25 MHz, so you can only OC to 1000 MHz, 1025 MHz and 1050 MHz - quite a limitation. After 1050 MHz the steps become smaller again.
http://www.techpowerup.com/reviews/MSI/HD_4850/24.html

Perhaps this pattern repeats itself at around 1100MHz

[Battlestar]

@DemonEyes- thanks bro, forgot to check that your using H2o on your 4850 right? Hmm I think the BIOS settings is not appropriate on air cooling like mine :)

[jimmyz]

@Caped Crusader
@eddieobscurant
@Battlestar
Concering those bios requests: I'll post rapid share links this afternoon. Right now I'm at work.

Did some further testing last night, but it seems that 710MHz on the core is the max with stock voltage for me.
715MHz gives me artefacts in AtiTool after 1 minute or so.
But I encountered something else.
It seems that the speedsteps for the overclocking the memory becomes rather large after a certain threshold.

When I set 1125MHz in bios, GPU-Z reports 1125MHz being used correctly
When I set 1135MHz in bios, GPU-Z reports 1125MHz being used
When I set 1140MHz in bios, GPU-Z reports 1125MHz being used
When I set 1145MHz in bios, GPU-Z reports 1125MHz being used
I recall I don't have that problem with Overdrive. When I set 1140MHz in Overdrive, GPU reports 1140MHz.

What's that about? Does driver level overclocking allow for smaller steps concerning mem speeds?

W1zzard reported the same thing, it seems that the memory scales in 25mhz jumps. so even though you can set it at different speeds it performs best at 25mhz jumps.

[DemonEyez]

@DemonEyes- thanks bro, forgot to check that your using H2o on your 4850 right? Hmm I think the BIOS settings is not appropriate on air cooling like mine :)Yes, i use a Swiftech MCW60 to cool things down with H20. I wouldn't with just stock cooler.

[[XC] gomeler]

@Caped Crusader
@eddieobscurant
@Battlestar
Concering those bios requests: I'll post rapid share links this afternoon. Right now I'm at work.
Important!, I use watercooling. I wouldn't recommend going above 700MHz with the stock cooler

Did some further testing last night, but it seems that 710MHz on the core is the max with stock voltage for me.
715MHz gives me artefacts in AtiTool after 1 minute or so.
But I encountered something else.
It seems that the speedsteps for the overclocking the memory becomes rather large after a certain threshold.

When I set 1125MHz in bios, GPU-Z reports 1125MHz being used correctly
When I set 1135MHz in bios, GPU-Z reports 1125MHz being used
When I set 1140MHz in bios, GPU-Z reports 1125MHz being used
When I set 1145MHz in bios, GPU-Z reports 1125MHz being used
I recall I don't have that problem with Overdrive. When I set 1140MHz in Overdrive, GPU reports 1140MHz.

What's that about? Does driver level overclocking allow for smaller steps concerning mem speeds?


*edit* found something about the changing steps in a MSI HD4850 review on Techpowerup.com:


http://www.techpowerup.com/reviews/MSI/HD_4850/24.html

Perhaps this pattern repeats itself at around 1100MHz

*shrug* not too much of an issue, gotten pretty used to pushing GPUs in chunks. Does RV770 have the same ~30MHz jumps like RV670 or are the steps more refined? edit: in regards to GPU speeds.

[gurusan]

the smallest increment I have tried on the GPU is 5mhz and it seems to be fine...

[[XC] gomeler]

the smallest increment I have tried on the GPU is 5mhz and it seems to be fine...

Glad to hear. BIOS clocking is the only way to currently adjust above 700MHz? Not necessarily bad, just a lengthy process filled with reboots or risking Winflash :eek:

[gurusan]

Yup at the moment it's the only way. A bit annoying but I'm sure there will be driver based solution in the near future.

[[XC] gomeler]

K sounds good. Just read through the other thread, glad we can atleast BIOS flash, that's more important than driver clocking to me :up:

[Caped Crusader]

900 mhz on an accelero S1 1.51v i have not tried for more.. almost 50k in 03 VERY bloated install.. :up::up:
http://www.hwbot.org/result.do?resultId=748596

900Mhz with such a hot chip?! That's a pretty amazing feat, dude :)

[DemonEyez]

I've uploaded my MSI bios and the modified Sapphire bios. Both are set to 710/1125MHz in 3D and 160/500MHz in 2D

http://rapidshare.com/files/125127156/MSI_HD4850_710-1125.rom.html

http://rapidshare.com/files/125128080/SAPPHIRE_HD4850_710-1125.rom.html

http://img204.imageshack.us/img204/6666/7101125gq0.jpg

Be sure to backup your original bios and have a automated restore floppy/usb disk at hand, should anything go wrong. Use at own risk
Make sure you have appropiate cooling!


900 mhz on an accelero S1 1.51v i have not tried for more.. almost 50k in 03 VERY bloated install.. :up::up:
http://www.hwbot.org/result.do?resultId=748596
Very,very nice! :up:

[Caped Crusader]

@Caped Crusader
@eddieobscurant
@Battlestar
Concering those bios requests: I'll post rapid share links this afternoon. Right now I'm at work.
Important!, I use watercooling. I wouldn't recommend going above 700MHz with the stock cooler

Did some further testing last night, but it seems that 710MHz on the core is the max with stock voltage for me.
715MHz gives me artefacts in AtiTool after 1 minute or so.
But I encountered something else.
It seems that the speedsteps for the overclocking the memory becomes rather large after a certain threshold.

When I set 1125MHz in bios, GPU-Z reports 1125MHz being used correctly
When I set 1135MHz in bios, GPU-Z reports 1125MHz being used
When I set 1140MHz in bios, GPU-Z reports 1125MHz being used
When I set 1145MHz in bios, GPU-Z reports 1125MHz being used
I recall I don't have that problem with Overdrive. When I set 1140MHz in Overdrive, GPU reports 1140MHz.

What's that about? Does driver level overclocking allow for smaller steps concerning mem speeds?


*edit* found something about the changing steps in a MSI HD4850 review on Techpowerup.com:


http://www.techpowerup.com/reviews/MSI/HD_4850/24.html

Perhaps this pattern repeats itself at around 1100MHz

Oops, didn't realise you were using water!!:p:

Thanks anyway!! :)

[Caped Crusader]

Guys, any luck changing fan settings? RBE doesn't allow (yet), AFAIK...

[BAGZZlash]

Guys, any luck changing fan settings? RBE doesn't allow (yet), AFAIK...


RBE v1.11 will. Check later today or tomorrow for it. ;)

[[XC] gomeler]

RBE v1.11 will. Check later today or tomorrow for it. ;)

Sweet and thanks for all the help :up:

[Battlestar]

RBE v1.11 will. Check later today or tomorrow for it. ;)

Dude, your a big help for us, keep us updated:clap:

[Miwo]

900MHz, very impressive James :)
It sounds almost like we may be able to hit the limit on air cooling using the 4850. All that extra vregs on the 4870 may make it better if you are using water and above, but I imagine the 4850 has to be pretty starved for bandwidth at 900MHz core.

[JamesBong420]

i know i can get more then 900 air... temps dont even hit 50c...stock clocks/volts load never broke 38c...

i stoped at 900 last night casue it was getting late. more later..

[ralf11]

http://img110.imageshack.us/img110/667/37673207nt8.jpg (http://imageshack.us)

4850 Gigabyte Bios.

Maybe change this values take effect.

[BAGZZlash]

http://img110.imageshack.us/img110/667/37673207nt8.jpg (http://imageshack.us)

4850 Gigabyte Bios.

Maybe change this values take effect.

What effect do you suppose this to have? It will only disable overdrive for this segment inside the BIOS is protected by a checksum. Because this sum's algorithm is unknown, we can't do anything about it. You're right, the values are what overdrive offers as a maximum for overclocking using overdrive, but if they get changed, overdrive won't work at all. At least, this was the case for 3xx0 cards.

[[XC] gomeler]

Could disabling overdrive enable rivatuner frequency adjustments by borking the driver controls on reverting clocks to the stock values? Perhaps it'll just bork the card BIOS? Worth a shot :up:

[STaRGaZeR]

What effect do you suppose this to have? It will only disable overdrive for this segment inside the BIOS is protected by a checksum. Because this sum's algorithm is unknown, we can't do anything about it. You're right, the values are what overdrive offers as a maximum for overclocking using overdrive, but if they get changed, overdrive won't work at all. At least, this was the case for 3xx0 cards.

There were some 38x0 BIOS that had Overdrive up to 1500 for the core and it works flawlessly, I have one of them right now so it can be done. Problem is how :p:

[Miwo]

i know i can get more then 900 air... temps dont even hit 50c...stock clocks/volts load never broke 38c...

i stoped at 900 last night casue it was getting late. more later..

Interesting, seems the heat output on the 4850 isnt that much greater than the 3870 then. I break just over 55C @ 1GHz on 1.55v with my 3870 with my Accelero S1.

James, do you hear any "squealing" noises from the capacitors/chokes on the 4850 @ 900MHz? I had this problem with my 3870 under load such as in ATITool artifact tester

[JamesBong420]

rivatuner just does not have the oc option(yet)...the little card u normally click on is not even there.

well all the way up to 875 there was no squealing. but at 900 there is a littlebit.. i have not added anything else besides some sinks.. some caps i shall be adding soon..

she is totaly 100percent stable.. played cod4(mp) for a while(an hour) at 900mhz not even a glitch... i just love how much smoother this thing is even at 700 mhz then my 3850 at 1039mhz.. :up::rolleyes::cool::p::D

now im stuck at work just wanting to play.. LOL

[Zucker2k]

There were some 38x0 BIOS that had Overdrive up to 1500 for the core and it works flawlessly, I have one of them right now so it can be done. Problem is how :p:

Off topic: Javier, how's Madrid this afternoon? I bet it'll be one hell of a party city if you guys make it past the Russians huh? I'll be watching, should be an interesting game. No?

[Miwo]

awesome, good to know. let us know what caps you are going to add or replace the existing ones with
have you also done the vDDR mod? I can't decide if I want to go all out with the 4850 on some good air, or drop the extra $100 for the memory bandwidth of 4870 and better power regulation circuitry. I play on 1920x1080, which is only 8% more pixels than 1600x1200

[OCam]

Any Chance Some one could run some benches at 750 mhz ?(other than crysis!) trying to decide on single 4870 on air or vmodded 4850 on water

Edit: would a would a 120mm rad be enough for a chipset cooler and a 4850?

THX

[[XC] gomeler]

I can already bet that the 4870 will come out 10% ahead if not higher just from my experience with the 3850 vs 3870. Get a 4870 and clock it to 900MHz :up:

[Caped Crusader]

rivatuner just does not have the oc option(yet)...the little card u normally click on is not even there.

well all the way up to 875 there was no squealing. but at 900 there is a littlebit.. i have not added anything else besides some sinks.. some caps i shall be adding soon..

she is totaly 100percent stable.. played cod4(mp) for a while(an hour) at 900mhz not even a glitch... i just love how much smoother this thing is even at 700 mhz then my 3850 at 1039mhz.. :up::rolleyes::cool::p::D

now im stuck at work just wanting to play.. LOL

What are you using to cool the damn thing?!

[Miwo]

Accelero S1 rev2 on 1.51v, he mentioned it above earlier. Its a great cooler that is often overlooked, very easy to add fans that will cover the full length of the card

[Caped Crusader]

Accelero S1 rev2 on 1.51v, he mentioned it above earlier. Its a great cooler that is often overlooked, very easy to add fans that will cover the full length of the card

Cool! (literally) Then it is confirmed that it is compatible hith the HD48X0 line? :)

[Miwo]

Yep, any cooler that fits on the 3870 should fit fine on the 4870. They share the same mounting holes
Hardwarecanucks has a section in their review where they explain aftermarket cooling solutions, check it out. HR-03gt does very well, the Accelero S1 is probably a few degrees higher in comparison, though half the price.

[JamesBong420]

my S1 does a GREAT job... i have two 120mm at 100cfm each..

the card is hardmoded of coarse..

4850 with s1:yepp:
http://www.buydurango.com/josh_files/computers/ghetto/DSCF6273750.jpg

[STaRGaZeR]

Off topic: Javier, how's Madrid this afternoon? I bet it'll be one hell of a party city if you guys make it past the Russians huh? I'll be watching, should be an interesting game. No?

I hope so Richard. Every match since the beginning of the Euro has been a complete party, I will be in the core of it tonight and in the final too if we beat the Russians. Even if we lose the party will be long, very long (as always in Spain :p:). And considering the 4-1 in the first round I think we will play against Germany :D

[ante_ante]

Just recieved 2 pieces of HIS 4850. Haven´t changed to Artic MX2 yet. But idle temps in CCC is around 70-80 degrees.
Waiting for some new tubing, then i´m going to watercool both cards with Maze5 blocks. Hope it will do great on temps :)

[JamesBong420]

dont worry about temps these things are cold as hell...... if the fan on your stock sink was even at 60 percent you would see 50c idles instead of the 70c.. so water you should be well under 30c.... :yepp::up:


edit: finally we can make our submissions public now finally on the ORB.. instead of just 3dmark01..

[ralf11]

RBE v1.11 will. Check later today or tomorrow for it. ;)

TODAY. TODAY!!

We all waiting for this :)

Set fan to 100% and OC :cool:

[Boogerlad]

i didn't have time to read through the whole thread, but when you say that the "700 mhz wall on hd4850 is smashed", you mean that the limit on ccc can go above 700mhz right?

[ghost101]

i didn't have time to read through the whole thread, but when you say that the "700 mhz wall on hd4850 is smashed", you mean that the limit on ccc can go above 700mhz right?

All you have to do is read the first post.

[Boogerlad]

All you have to do is read the first post.

Thanks! I got pretty confused lol.

[BAGZZlash]

RBE v1.11 (http://www.techpowerup.com/downloads/Utilities/RBE/) just released!

Changelog:
v1.11
- Fixed values written if look up table is used.
- Improved method of clock rates detection (old method was not working properly with some weired BIOSes).
- Added some FireGL device IDs.
- Added some stuff to the in-program-FAQ.
- Undated link to WinFlash.
- Fixed little bug occuring writing some BIOS infos.
- Fixed some confusion regarding 3650 cards.
- Added support for some exotic mobile card's BIOSes (experimental).
- Added support for HD 4850/4870 (experimental).
- Added fan control for most 3870 X2.

[gurusan]

Excellent. very well done and thank you!!!!

[gurusan]

RBE is working great!

So far I have achieved 820mhz/1100 on the stock cooler. I used a mixture of bios and pencil mod to get 1.17v idle and 1.33 load :)

Once you use RBE to change the fan profile it is actually quite a sufficient cooler.

http://gpuz.techpowerup.com/08/06/26/fes.png

And this is how I changed the fan profile in RBE:

http://img125.imageshack.us/img125/830/59962621kn2.jpg

[jimmyz]

RBE v1.11 (http://www.techpowerup.com/downloads/Utilities/RBE/) just released!

Changelog:
v1.11
- Fixed values written if look up table is used.
- Improved method of clock rates detection (old method was not working properly with some weired BIOSes).
- Added some FireGL device IDs.
- Added some stuff to the in-program-FAQ.
- Undated link to WinFlash.
- Fixed little bug occuring writing some BIOS infos.
- Fixed some confusion regarding 3650 cards.
- Added support for some exotic mobile card's BIOSes (experimental).
- Added support for HD 4850/4870 (experimental).
- Added fan control for most 3870 X2.



BAGZZlash is certainly becoming a hero to us all, awesome work buddy, tell W1zzard we appreciate you guys's work so much:up:

I am very impressed so far with the progress made this is going to be a great card for ATI and by doing that it forces the competition to push to a higher level and a lower price..

[ralf11]

Thanks for RBE 1.11

Fan control works PERFECT!!

[darkskypoet]

Removed... Damn i feel dumb ;)

[Clemmaster]

Excellent stuff there!
I still get troubles with 2d mod (frequency doesn't change, neither 160/500 nor 500/750). How can I make a smooth fan regulation? I think I'll try the second type of regulation (table).

Thank you very much

[Heretic]

Excellent stuff there!
I still get troubles with 2d mod (frequency doesn't change, neither 160/500 nor 500/750). How can I make a smooth fan regulation? I think I'll try the second type of regulation (table).

Thank you very much

I haven't used it, but it looks like you can decrease slope if you decrease TMin, Increase TMax and/or increase the Duty Cycle.

[chri5g]

i set 1.56V in 3D isn`t too much???
WC installed
725/1125
Avg=26.2
920/1125
Avg=31.0
anizo-16x
http://www.imagehosting.com/out.php/i1811278_920.jpg (http://www.imagehosting.com)
http://www.techpowerup.com/gpuz/nqpf/
Comapny of H DX10 anizo=16x
700Mhz
avg=37.5
920Mhz
avg=50.590

[mascaras]

before :

http://img529.imageshack.us/img529/8157/originalvt7.jpg (http://imageshack.us)




after (only changed Fan speed to 55% - clocks & voltages remain stock)

http://img141.imageshack.us/img141/8672/55tg5.jpg (http://imageshack.us)

[msimax]

nice clock chri5g:D is that chilled or regular water?

[bigslappy]

sub'ed

;p

[chri5g]

nice clock chri5g:D is that chilled or regular water?

regular water,NB,CPU.2xGPU

[purecain]

:up:in rbe 1.11 whats the core speed we have to set to actually get the core speed to change, or is this still a work in progress...

if so i'll continue my trial and error...


heres a pic of my progress so far....:up:

[keninishna]

:up:in rbe 1.11 whats the core speed we have to set to actually get the core speed to change, or is this still a work in progress...

if so i'll continue my trial and error...


heres a pic of my progress so far....:up:

Disable ATI overdrive cause when windows starts up it just changes the frequencies again.

[Battlestar]

Anyone had similar issues on my prob?

Hi I have a problem regarding the RBE latest version. I set the fan into default settings and it shows on GPU-Z 50% fan speedand it drops my temps from 72deg to 61deg :), my problem is it underclock my GPU Clock into 500Mhz but the Default Clock remains 625 Mhz with same Memory 993Mhz I think. Is this normal? Sorry I can't provide screenshot still here @ the office :( Anyways, I revert my default BIOS and still waitin' for your answers :)

Hmm Im not sure buddy, But Im pretty sure when you check on GPU-Z under Graphics Card Tab at the botton you can see this following:

Using RBE with 50% FanSpeed (I used the Set all fan settings to recommended values that's why came up 50% FanSpeed)
GPU Clock: 500Mhz Memory:9XXMhz
Default Clock 625 Mhz Memory:9XXMhz

Also on GPU-Z Sensor Tab:
GPU Core Clock: 500Mhz
GPU Memory Clock: 9XXMhz

My Default BIOS
GPU Clock: 625Mhz Memory:9XXMhz
Default Clock 625 Mhz Memory:9XXMhz

Another thing, I don't see anything this kind of tables on my latest RBE :(
*See attached file with red box

http://img235.imageshack.us/img235/7287/59962621kn2gx2.jpg

Im using WinXP SP3
Sapphire 4850

[Pt1t]

When i edit bios , fan speed is ok but GPU clock max to 700 and vGPU doesnt change.

[darkskypoet]

@Battlestar: I am also missing the area indicated by red box, however, I just used the graph and bumped the minimum up, and steepened the slope some. However, Sensors (page in GPU-Z) doesn't accurately report GPU speed when operating in 3d mode, just sits at 500 all the time... Not sure if this is just cause its early, or what.

Also, my down clock to Power State 1 (power play 2d setting) doesn't change clock speed at all. So I'll try another setting... Perhaps I just have to use the right numbers. Can anyone confirm if changing voltage in Bios with RBE actually works? Or are we bound to mod for voltage tweaks?

[Battlestar]

@Battlestar: I am also missing the area indicated by red box, however, I just used the graph and bumped the minimum up, and steepened the slope some. However, Sensors (page in GPU-Z) doesn't accurately report GPU speed when operating in 3d mode, just sits at 500 all the time... Not sure if this is just cause its early, or what.

Also, my down clock to Power State 1 (power play 2d setting) doesn't change clock speed at all. So I'll try another setting... Perhaps I just have to use the right numbers. Can anyone confirm if changing voltage in Bios with RBE actually works? Or are we bound to mod for voltage tweaks?

I see, can you please provide a screenshot when you got an satisfied settings on RBE? Thanks :)

[darkskypoet]

@Battlestar; just PM me and I'll email you one of what I have that works fine for my fan speeds. I don't have power play under clock working yet.

[DemonEyez]

I was wondering, does the voltage control actually work? If so then hard-vmodding would be absolete, right? Nice! :up::clap:

[gurusan]

I have tried putting the voltage adjustments up to 1.4v but this results in only 1.21v...which is still .05v over stock so it's a small increase and allows you to go to 725-750 core.

[Pt1t]

I have tried putting the voltage adjustments up to 1.4v but this results in only 1.21v...which is still .05v over stock so it's a small increase and allows you to go to 725-750 core.

Could you post RBE frequency tab shot ? With 800mhz 3D core. When i try 800 or more than 700mhz, results is max 700mhz :(

[DemonEyez]

Okay, good to know :) before hard modding, I want to find out what the max is of my core.

Could you post RBE frequency tab shot ? With 800mhz 3D core. When i try 800 or more than 700mhz, results is max 700mhz :(Take a look at this shot. it's my bios for 710core and Powerplay at 160/500 in 2D.
http://img204.imageshack.us/img204/6666/7101125gq0.jpg

Just replace al of the 710's with 800's (and giveup your corresponding voltage) and it should work. And disable Overdrive in Windows, or it wil override your setting of 800

[gurusan]

Could you post RBE frequency tab shot ? With 800mhz 3D core. When i try 800 or more than 700mhz, results is max 700mhz :(

You need to disable overdrive, otherwise CCC will force it back to 700mhz :) I did this mistake as well.

[Pt1t]

You need to disable overdrive, otherwise CCC will force it back to 700mhz :) I did this mistake as well.

Thanks, and for vGPU ? you just type ~1.3v for 3d settings voltage and it works ? Because i have only 1.17v in load ^^

[gurusan]

For me the vgpu only allowed me to go up to 1.21v through the bios

[Pt1t]

For me the vgpu only allowed me to go up to 1.21v through the bios

for 1.21 , you put 1.3v ?

[gurusan]

I put 1.400v actually and it only got me to 1.21v

[biftek.]

What drivers are you guys using? The Hotfix I presume?

[darkskypoet]

@biftek: Yep. Although, I never really encountered any stability issues with 8.6.

[aldamon]

gomeler;3093048']I can already bet that the 4870 will come out 10% ahead if not higher just from my experience with the 3850 vs 3870. Get a 4870 and clock it to 900MHz :up:

So 10% is worth 2x the price?

Can someone elaborate on how much memory bandwidth the 4850 needs? How much is performance scaling on the 4850 with this new BIOS? I was leaning towards a 4870, but this BIOS hack is blowing my mind.

[zbomb5610]

i got my visiontek 4850 doing 725/1050 no problems so far. what benches are you guys using for stability on these cards since ati tool doesn't work? I remember using the fur renderer when i had my 8800gt and it killed 2 of my cards and i know of several other people that had their cards die on them, so i don't really want to use that for stability testing.

[gurusan]

For anyone who is interesed, I have modded the 4850 MSI bios....not only have I raised clocks and voltage under load, but I have improved on the powerplay feature as well as the fanspeeds. IMO this is how it should have been shipped from the factory...it is a bit loud while gaming and such but this way the cooler is actually effective!:


2d clocks
.98vGPU, 160core/500mem

3d clocks
1.20vGPU, 720core/1100mem

Download here
http://cid-dd5c526e6044c7cc.skydrive.live.com/self.aspx/Public/Guru4850Bios.bin


The fan will only go down to around 25% in idle and 2d clocks, but it's pretty much inaudible and during 3d clocks should keep it under 70c full load, more like mid-low 60s.


All the reference 4850s should be able to do this, but if you are getting crashes then I can make you up a slightly less aggressive profile, or you can edit it yourself with the RBE tool. I recommend stress testing with rthdribl and some Crysis benches.

http://img233.imageshack.us/img233/9156/23160743ls1.jpg

[Battlestar]

Hi Gurusan,

It seems your pretty active on this thread :) Can I ask a favor? Could you make me one that comes with:
GPU Clock: 675Mhz
Memory: 1000Mhz
FanSpeed 60% on Load and 25% on Idle?
Clock Info1:160/500?
Clock Info2:500/750?
You may DL the stock BIOS of my card here: http://www.techpowerup.com/vgabios/index.php?page=1&architecture=ATI&manufacturer=Sapphire&model=HD+4850&interface=&memSize=0
Thanks-Battlestar

[annihilat0r]

Great work people! How about putting in some benches? The memory can hardly be overclocked and I wonder if with such aggressive core clocks (such as 925MHz :O) the card is bandwidth starved?

For example, a comparison benchmark between 800-900MHz would do the trick

[Caped Crusader]

Thanks gurusan!! this will come very handy!! I did my own profile with RBE too, but I couldn't fiddle with vgpu settings. I might give this one a try after lowering the core and mem freq. to a more acceptable 680/1075 (these ones I know my card can handle...)

:)

[albon]

One could explain me what is the difference between State 1 and State 3 in RBE ?
And now much can we increase Vgup ? Is there a limit ?

[gurusan]

Hi Gurusan,

It seems your pretty active on this thread :) Can I ask a favor? Could you make me one that comes with:
GPU Clock: 675Mhz
Memory: 1000Mhz
FanSpeed 60% on Load and 25% on Idle?
Clock Info1:160/500?
Clock Info2:500/750?
You may DL the stock BIOS of my card here: http://www.techpowerup.com/vgabios/index.php?page=1&architecture=ATI&manufacturer=Sapphire&model=HD+4850&interface=&memSize=0
Thanks-Battlestar

Try this, the fan profile may not be exactly as you want it, you can play with the slope using RBE:
http://rapidshare.com/files/125402386/moddedsapphire.rom.html

Thanks gurusan!! this will come very handy!! I did my own profile with RBE too, but I couldn't fiddle with vgpu settings. I might give this one a try after lowering the core and mem freq. to a more acceptable 680/1075 (these ones I know my card can handle...)

:)

The stock bios is 1.15-1.16 load, my bios is 1.20-1.21v load so you should be able to do much more than 680mhz on 1.2v :) No harm in being conservative though

[albon]

I have a small problem with RBE: every time I mod a bios and save it, i lose all the voltage settings, they re replaced with ---
For example if I open an official bios file or your bios Gurusan in RBE, i see the voltages, but when I save the file and reopen it all the voltages are gone (---).

[adpr_02]

Noob question here, but how do you flash the bios onto the card without using winflash. For some reason it doesn't start for me:shrug:.

[gurusan]

-you download this:
http://www.techpowerup.com/downloads/1061/mirrors.php

-put it on a bootable usb stick (to make a bootable USB stick google "hp drive key boot utility"

-then boot from the usb drive

-type: atiflash -p 0 (newbios)

if the SSIDs don't match then type atiflash -p -f 0 (newbios)

[Caped Crusader]

Try this, the fan profile may not be exactly as you want it, you can play with the slope using RBE:
http://rapidshare.com/files/125402386/moddedsapphire.rom.html



The stock bios is 1.15-1.16 load, my bios is 1.20-1.21v load so you should be able to do much more than 680mhz on 1.2v :) No harm in being conservative though

Yeah, you're probably right, but in a previous test I tried 680/1100 and ATITool started giving me errors and artifacting, so I guess a higher mem overclock is somehow limited on my card. Furthermore I've been following some user reviews throughout the web and in most of the tests the jump from 1075 to 1100Mhz isn't giving higher performance in games or higher framerates, actually in some cases the performance lowered a bit, perhaphs the mem chips are encountering some gpu bottlenecking, I don't know...

Anyway, might try a 700ish on the core 'though :p:

[biftek.]

-you download this:
http://www.techpowerup.com/downloads/1061/mirrors.php

-put it on a bootable usb stick (to make a bootable USB stick google "hp drive key boot utility"

-then boot from the usb drive

-type: atiflash -p 0 (newbios)

if the SSIDs don't match then type atiflash -p -f 0 (newbios)

You can also use ATI winflash. 2.0.0.7 works in Vista 64.
But I've never had an issue flashing any sort of bios through windows. :p: *knock on wood*

[gurusan]

winflash has never worked for me. Always freezes on launch and cpu usage goes to 100%.

[adpr_02]

Booting from a usb didn't work. It told me it can't boot. BUT, Winflash 2.0.0.7 worked for me - thanks!

Guru, I used your bios, and edditted it so that my ram is lower (It doesn't work well at 1100mhz) and when i flashed, my old overclocks were still the same as I had set from CCC....

Any thoughts.


That said, I forgot to back up my original bios :shakes:...sigh...

[albon]

I have a small problem with RBE: every time I mod a bios and save it, i lose all the voltage settings, they re replaced with ---
For example if I open an official bios file or your bios Gurusan in RBE, i see the voltages, but when I save the file and reopen it all the voltages are gone (---).
To follow that, there is a BUG in RBE 1.10 and 1.11 which misinterprets Voltage values if you are in countries where decimal separator is "," (comma).
So if you live in Europe (except UK), change your Regional settings to English(UK) in Control Panel, before modding bioses with RBE.

[gurusan]

You need to disable overdrive otherwise CCC takes over.

[JamesBong420]

could not get 950 mhz core stable.. no matter the volts... added some 2.5v uf800 caps to the back as well.. still should had a few more..

also..... in the voltage settings i had to change ALL(including the "---") of the voltages manually(in RBE) so i could even break 920 mhz.... the voltages would go from 1.58v to 1.43... once i changed all the voltages in RBE it was artifact free and droop free... i gave her all the way up to 1.7v on the core and no go still at 950. but 1.54v 920 is stable..... load goes to 1.59v from the 1.54v idle...

just an update... :up::yepp::cool::D:p:

[adpr_02]

K. I saw the clocks until ati took over.

I try to disable it from the CCC, and it re-enables when I click apply.... is there a registry key I need to change?

[Miwo]

could not get 950 mhz core stable.. no matter the volts... added some 2.5v uf800 caps to the back as well.. still should had a few more..

also..... in the voltage settings i had to change ALL(including the "---") of the voltages manually(in RBE) so i could even break 920 mhz.... the voltages would go from 1.58v to 1.43... once i changed all the voltages in RBE it was artifact free and droop free... i gave her all the way up to 1.7v on the core and no go still at 950. but 1.54v 920 is stable..... load goes to 1.59v from the 1.54v idle...

just an update... :up::yepp::cool::D:p:

what kind of temps are you getting with the Accelero S1 @ 1.58v 920MHz? I wonder if you are just about reaching the limit of the 4850. The 4870 is supposed to have much beefier vregs / phases, and the additional 6pin power

[Battlestar]

Thanks Gurusan, I'll keep this BIOS safely it woks like a charm for me :)

[JamesBong420]

@miwo

temps were hitting 55c load, 38c idle.... the s1 does a great job... :up::yepp::D

[ali123]

w00t this has convinced me to buy a 4850! can you guys put up some 3dmark 06 scores?

thx, Ali

[zbomb5610]

All the reference 4850s should be able to do this, but if you are getting crashes then I can make you up a slightly less aggressive profile, or you can edit it yourself with the RBE tool. I recommend stress testing with rthdribl and some Crysis benches.

http://img233.imageshack.us/img233/9156/23160743ls1.jpg

so i installed rthdribl and ran it, changed the multisampling to 16x but every 30 seconds the screen starts skipping and I get 2fps, it also did this with 4x multisampling.

is there a setting that I did not do? or does that mean the card is not stable?

[gurusan]

Thanks Gurusan, I'll keep this BIOS safely it woks like a charm for me :)

Glad to hear! I was scared I made the clocks a bit too aggressive but I'm glad someone besides me is getting it to work :D


so i installed rthdribl and ran it, changed the multisampling to 16x but every 30 seconds the screen starts skipping and I get 2fps, it also did this with 4x multisampling.

is there a setting that I did not do? or does that mean the card is not stable?

hmm I don't know why it's doing that. If it were unstable then usually the driver will crash and then recover...or the computer will freeze.

Is something else taking priority of your CPU? Does it do it with the normal bios?

[biftek.]

Hey guru I'm having an issue with the 2D profile working with your BIOS. It seems to run with the 3D settings all the time. I did, tweak it a little, but just for the Fan profile.


Also (possibly) unrelated, this is what happens to the Overdrive tab in CCC for me, it occasionally flashes to show what should be there, only with blank values. (see attached file) I don't think that should be normal :p:
This is with the Hotfix Driver. :shrug: I've tried reinstalling it, seems to only be a CCC issue, as the in game performance is solid so I dont think it's in the drivers. I'll try stressing it with the crysis bench and see if maybe it just isn't stable?

[gurusan]

hmm that's odd, I don't know what to say as the 2d profiles are working fine for me? Perhaps it's a bad driver install? How about downloading a stock bios from the techpowerup database and editing it yourself to see if you have the problem again.


On another note, I just did a 3dmark06 run and am pleasantly surprised at the result. This was at 720/1200 with an E6750 @ 3.64ghz, 4gb OCZ @ 1090mhz 5,5,4,14

Not bad for a dual core and single card.
http://img406.imageshack.us/img406/6613/87981222an9.jpg

[zbomb5610]

hmm I don't know why it's doing that. If it were unstable then usually the driver will crash and then recover...or the computer will freeze.

Is something else taking priority of your CPU? Does it do it with the normal bios?

it is weird actually, cause i had a 725/1050 oc which ran fine, then i ran rthdribl and it would do that 2fps thing every once in a while. Then i flashed the bios to 750/1100 and when i restarted, the mouse was really lagging, i couldn't do anything in windows.

flashed back to my 725/1050 oc and it was doing the same, flashed back to stock bios and it still did the same. i turned everything off, checked connections to see if my raid sata cable was getting loose, turned off the psu completely, pressed the power button a few times, then restarted and it worked like normal with stock bios.

i gave the 750/1100 oc another try and now the computer is working flawless again and rthdribl is not doing the 2fps thing anymore.

not sure what the problem was exactly.

but thanks for the help. i have 44 load w/ the accelero.

[BAGZZlash]

Hi!

I figured what may be part of the problem. As you know, some clock info settings of RBE are locked by default. As this was helpful for 3xx0 cards, it might be disturbing for 4xx0 cards, which is why from RBE v1.12 on, it will be turned off by default.
In RBE v1.11, it's on by default and so, it kicks in: RBE loads the BIOS and displays the clocks, but due to the lock, all locked clocks are the same. Again, for 3xx0 cards, these clocks really were the same, but not for 4xx0 cards.
Even when you unlock after loading the BIOS, the information is gone. So, I made a screenshot with lock turned off by default and RBE shows this:

http://freenet-homepage.de/BAGZZlash/Unlocked.png

So maybe you should consider changing clock info 3 to 9 for overclocking (at least 3 and 7 to 9, for I'm pretty sure 4 to 6 are used in UVD mode only), clock info 1 for 2D mode and clock info 2 for low 3D mode (i.e. Vista aero).

A 4870 BIOS I loaded had "high" clocks at 3 and 9 only (besides 4 to 6 for UVD), so maybe this may be enough for overclocking. Clock info 8 is medium performance setting (i.e. for Vista aero) for state 3 then. See:

http://freenet-homepage.de/BAGZZlash/Unlocked2.png

Furthermore, clock info 7 may be the 2D setting if the card is at powerplay state 3.

Long story short - You maybe want to use this as a basis:

http://freenet-homepage.de/BAGZZlash/Unlocked3.png

I entered a GPU clock of 710 and a memory clock of 1030 MHz to denote "overclock here". Enter the values of your choice.

I'd be glad if anyone gave me an update about whether this was useful.

[DemonEyez]

I'm currently testing with Gurusan's bios and i figured out that you don't need to set vgpu at 1.4v in bios to get 1.21v (read out with DM)

This is what I got:

1.40v set in bios gives me 1.9v ( 1865 milli v to be exact) on my DM
1.30v set in bios gives me 1.9v ( 1865 milli v to be exact) on my DM
1.25v set in bios gives me 1.9v ( 1865 milli v to be exact) on my DM

Right now I'm @ 750MHz with 1.9v, not bad I think, still haven't done a hardmod :)
Will do a bench in minute

[XMoA]

could not get 950 mhz core stable.. no matter the volts... added some 2.5v uf800 caps to the back as well.. still should had a few more..

also..... in the voltage settings i had to change ALL(including the "---") of the voltages manually(in RBE) so i could even break 920 mhz.... the voltages would go from 1.58v to 1.43... once i changed all the voltages in RBE it was artifact free and droop free... i gave her all the way up to 1.7v on the core and no go still at 950. but 1.54v 920 is stable..... load goes to 1.59v from the 1.54v idle...

just an update... :up::yepp::cool::D:p:


really amazing!

did you just solder pencil or did you solder a vr?

I also wonder if a 4870 can reach even more :P

[gurusan]

Thanks bagzzlash...that makes things a bit more clear.

[Shocker003]

hmm that's odd, I don't know what to say as the 2d profiles are working fine for me? Perhaps it's a bad driver install? How about downloading a stock bios from the techpowerup database and editing it yourself to see if you have the problem again.


On another note, I just did a 3dmark06 run and am pleasantly surprised at the result. This was at 720/1200 with an E6750 @ 3.64ghz, 4gb OCZ @ 1090mhz 5,5,4,14

Not bad for a dual core and single card.
http://img406.imageshack.us/img406/6613/87981222an9.jpg

Am not impressed with your score unless it´s a vista score. I am not a fan boy and i will soon be picking up a HD 4870. With my old 8800GTS 320mb SC, i was able to get 15k in 3Dmark 06 check sig. Can´t you bump up the shaders clock a bit and try tighten up your mem clocks(ram) maybe 4-4-4-10.That may increase you score:yepp: Well nice score for a start, keep pushing:up:

[gurusan]

Am not impressed with your score unless it´s a vista score. I am not a fan boy and i will soon be picking up a HD 4870. With my old 8800GTS 320mb SC, i was able to get 15k in 3Dmark 06 check sig. Can´t you bump up the shaders clock a bit and try tighten up your mem clocks(ram) maybe 4-4-4-10.That may increase you score:yepp: Well nice score for a start, keep pushing:up:

take a look again. I only have 2 cores.

[Jaystar]

I have a dmm hooked up to my card for testing. With a pencil mod done. I get just around 1.290v loaded regardless of what voltage I set in the bios. Is there any trick to getting higher voltages threw the bios? :confused:

[korda]

BAGZZlash:

After I change clock info 3 and 9 to my OC value (715 MHz) and saves the bios only nr 3 stays at 715. Nr 9 changes back to 500. Whats even more weird is that clock info 6 changes to 715 MHz instead. :)

But it seems to work anyway. The GPU jumps up to 715 in rthdribl, so I guess it works in games too.

Should I edit the bios again and only keep 3 at 715?? Clock info 6 ain't for 3d right?

This is a Gigabyte bios btw, same one as Sapphire uses.

2D voltage is 1.046 and 3D 1.084.

[cowie]

ok i'm like pissed, man no friggen software to clock as high as we dare?
i topped out 700/1200 and no volt mod yet.
to have to bois flash to o/c is not what i'm used to

[JamesBong420]

really amazing!

did you just solder pencil or did you solder a vr?

I also wonder if a 4870 can reach even more :P

i use a 100k VR... i dont use pencil anymore.. its not as reliable..

[Caped Crusader]

http://www.thermalright.com/new_a_page/product_images/vga_cooler/T-rad2/b/trad-4-1.jpg

http://www.thermalright.com/new_a_page/product_page/vga/t-rad2/product_vga_cooler_trad2.html

mmmm... mmmm.... might slap one of these on my 4850 :P

[keiths]

Would anyone care to bench something at 750 GPU and stock memory for comparing 4850/4870 GPU vs memory?: http://www.xtremesystems.org/forums/...d.php?t=192690 Been using games and settings used by the 4870 reviews in order to compare results.

[jimmyz]

ok i'm like pissed, man no friggen software to clock as high as we dare?
i topped out 700/1200 and no volt mod yet.
to have to bois flash to o/c is not what i'm used to

Then write it. If you think what W1zzard and BAGZZlash ( and others)do is easy, write some yourself. Nobody pays these fine people, they do it to help the community and ask for nothing but the occasional thank you or other compliment. Many people have spent a great deal of time, effort and even money to bring this information to you on a silver platter. you should be thankfull there is even a way to get above 700, it took a lot of effort to get this far.

[HousERaT]

Then write it. If you think what W1zzard and BAGZZlash ( and others)do is easy, write some yourself. Nobody pays these fine people, they do it to help the community and ask for nothing but the occasional thank you or other compliment. Many people have spent a great deal of time, effort and even money to bring this information to you on a silver platter. you should be thankfull there is even a way to get above 700, it took a lot of effort to get this far.
and then there was silence.........................

[Booj]

For anyone who is interesed, I have modded the 4850 MSI bios....not only have I raised clocks and voltage under load, but I have improved on the powerplay feature as well as the fanspeeds. IMO this is how it should have been shipped from the factory...it is a bit loud while gaming and such but this way the cooler is actually effective!:





The fan will only go down to around 25% in idle and 2d clocks, but it's pretty much inaudible and during 3d clocks should keep it under 70c full load, more like mid-low 60s.


All the reference 4850s should be able to do this, but if you are getting crashes then I can make you up a slightly less aggressive profile, or you can edit it yourself with the RBE tool. I recommend stress testing with rthdribl and some Crysis benches.


Thanks for that BIOS Gurusan. It works a treat for me :up: Its good to actually hear the fan doing some work under full load!

http://img73.imageshack.us/img73/4513/16465nz2.png

[biftek.]

Thanks for that BIOS Gurusan. It works a treat for me :up: Its good to actually hear the fan doing some work under full load!

*snip*

I think the fan is doing a bit to much work if ya know what i mean :rofl:
I'm gonna try and pick up an S1 over the weekend. :)

And did the 2d profile work for you? or am i alone in that issue?
I've reinstalled so many drivers today and yesterday I'm thinking of just doing a fresh windows install :/ I might have really jerked with some crap in the registry. :( it'd be nice to have an official driver actually.

[Bitgod]

Hey guru I'm having an issue with the 2D profile working with your BIOS. It seems to run with the 3D settings all the time. I did, tweak it a little, but just for the Fan profile.


Also (possibly) unrelated, this is what happens to the Overdrive tab in CCC for me, it occasionally flashes to show what should be there, only with blank values. (see attached file) I don't think that should be normal :p:
This is with the Hotfix Driver. :shrug: I've tried reinstalling it, seems to only be a CCC issue, as the in game performance is solid so I dont think it's in the drivers. I'll try stressing it with the crysis bench and see if maybe it just isn't stable?

Isn't that normal for using Aero Glass in Vista though? I know on my card, monitoring my system with Everest on my G15 LCD, that the GPU speed on my 8800GTX is always at "3D" speed, it never changes. That bugged me until I realized that it must be Aero Glass since the desktop is kinda always in 3D now, if I boot into my XP 32-bit install, I found that being at the desktop there, the GPU was running at "2D" speeds.

In an ideal world, I'd like to be able to do something like run the GPU at something lower, maybe 500Mhz for starters by default, and then when I go to play a game, some app has a profile for that game and kicks in to OC the GPU/RAM.

That said, my 4850s that weren't supposed to show up until Tuesday showed up today :) So I need to crank out some benchmarks on the old card first just so I have some comparisons between a 4850 and 4850 CF.

[biftek.]

Isn't that normal for using Aero Glass in Vista though? I know on my card, monitoring my system with Everest on my G15 LCD, that the GPU speed on my 8800GTX is always at "3D" speed, it never changes. That bugged me until I realized that it must be Aero Glass since the desktop is kinda always in 3D now, if I boot into my XP 32-bit install, I found that being at the desktop there, the GPU was running at "2D" speeds.

I'm not using aero glass though ;) Windows classic look FTW! :up: I like my Vista to look like 98

The only reason it bothers me is because it makes the fan run loud (~70%) all the time. I wouldn't mind it if it were just in game but I like my silence the rest of the time.

[Booj]

I think the fan is doing a bit to much work if ya know what i mean :rofl:
I'm gonna try and pick up an S1 over the weekend. :)

And did the 2d profile work for you? or am i alone in that issue?
I've reinstalled so many drivers today and yesterday I'm thinking of just doing a fresh windows install :/ I might have really jerked with some crap in the registry. :( it'd be nice to have an official driver actually.

2d is working for me. GPUz always shows me the 3d clocks in the main window while the 2d clocks are shown correctly on the sensors tab. My idle temps are a lot better too.

[biftek.]

2d is working for me. GPUz always shows me the 3d clocks in the main window while the 2d clocks are shown correctly on the sensors tab. My idle temps are a lot better too.

2D isn't working on any of the BIOS for me. :shakes: hmmmm, is there a power saving mode you have to enable somewhere that i'm missing?
I've tried what seems to be all the drivers, and tried them more than once, but it just wont kick in to 2D mode no mater what...

[jimmyz]

2D isn't working on any of the BIOS for me. :shakes: hmmmm, is there a power saving mode you have to enable somewhere that i'm missing?
I've tried what seems to be all the drivers, and tried them more than once, but it just wont kick in to 2D mode no mater what...

in the sensor tab? did you check it, the front "page" will show the 3-d clocks but the sensor tab should show real time clocks.

[Boogerlad]

I have a dmm hooked up to my card for testing. With a pencil mod done. I get just around 1.290v loaded regardless of what voltage I set in the bios. Is there any trick to getting higher voltages threw the bios? :confused:

a way to increase the voltage is to shade the resistor or point harder/darker. This will give you less resistance and more volts. Always check with the dmm though so that your card won't blow up.

[biftek.]

in the sensor tab? did you check it, the front "page" will show the 3-d clocks but the sensor tab should show real time clocks.

Yeah even the sensor tab is showing the 3D clocks. And the temps reflect it, so I know it's not just a program bug. I'm at a loss.

Gonna try on more driver reinstall.

[D749]

I was eager to get down and dirty with RBE after having my card run stable (e.g., 3DMark Vantage/06, FurMark, Lightsmark) at 700/1000 (set via CCC). However, after one adventurous clock to 700/1100, where things started to crash, I can't get back to 700/1000 without crashing! :eek: I'm not sure what the hell is up.

Threw up a post about it here if anyone has any suggestions. :yepp:

http://www.xtremesystems.org/forums/showthread.php?t=192821

[biftek.]

OMG I finally figured it out.
Apparently having dual monitors forces the cards into 3D mode :p:
That better change with a new driver.

Anyways, I'm finally enjoying a quite computer sans one monitor, and once again low temps.
That better be fixed with the next driver, there is no reason two monitors should count as "3D".

[cowie]

Then write it. If you think what W1zzard and BAGZZlash ( and others)do is easy, write some yourself. Nobody pays these fine people, they do it to help the community and ask for nothing but the occasional thank you or other compliment. Many people have spent a great deal of time, effort and even money to bring this information to you on a silver platter. you should be thankfull there is even a way to get above 700, it took a lot of effort to get this far.
sry to offend you
but i never said it was easy.
and i know that you had help from some of the best guys in the community getting where you are now.
i geuss i just took o/c programes for granted using nvidia products for the past few yrs.
but like i said bios flashing not for me since it voids my warrenty with the brand i use plus the fact i dont like to have high clocks all the time
again sry to get your wares in a knot
just a rant by me

[cowie]

and then there was silence.........................

wow :banana::banana::banana::banana::banana::banana::b anana::banana: your funny

[gurusan]

Thanks for that BIOS Gurusan. It works a treat for me :up: Its good to actually hear the fan doing some work under full load!


good to hear and impressive score!

[W1zzard]

2d is working for me. GPUz always shows me the 3d clocks in the main window while the 2d clocks are shown correctly on the sensors tab. My idle temps are a lot better too.

thats the intended behaviour. first page will show the 3d performance clocks and sensors will show realtime clocks

[D749]

Out of curiousty... how well do all of your overclocked cards hold up when running FurMark (http://www.ozone3d.net/benchmarks/fur/). I'm able to run 700/1000 at 1920x1200, with the fan cranked up a bit, in rthdribl (x16 multisample), 3DMark and games. However, running FurMark will bring my card to a halt.

[Booj]

thats the intended behaviour. first page will show the 3d performance clocks and sensors will show realtime clocks

Thanks for the clarification W1zzard. And 2 thumbs up for all your work for the community. :yepp:

[gurusan]

just got my 4850 under water.

27c idle and 31c load :eek:

will be clocking later today

[barong]

I've uploaded my MSI bios and the modified Sapphire bios. Both are set to 710/1125MHz in 3D and 160/500MHz in 2D

http://rapidshare.com/files/125127156/MSI_HD4850_710-1125.rom.html

http://rapidshare.com/files/125128080/SAPPHIRE_HD4850_710-1125.rom.html

http://img204.imageshack.us/img204/6666/7101125gq0.jpg

Be sure to backup your original bios and have a automated restore floppy/usb disk at hand, should anything go wrong. Use at own risk
Make sure you have appropiate cooling!



Very,very nice! :up:

does it works with HiS 4850 ?

[gurusan]

yes..it works with all reference 4850s

[diablos]

but is possible change the voltage?

[gurusan]

you can change the voltage up to 1.20, that's the limit on the bios vmodding




and here's something nice:

http://img157.imageshack.us/img157/7479/28052235sz2.jpg




for comparison :) should beat the GTX 280 as the guy who has 1st has a 45nm quad @ 3.7ghz, I have a 65nm dualcore @ 3.64ghz



http://img511.imageshack.us/img511/6281/83392671aj3.jpg

[Caped Crusader]

you can change the voltage up to 1.20, that's the limit on the bios vmodding




and here's something nice:

http://img157.imageshack.us/img157/7479/28052235sz2.jpg




for comparison :) should beat the GTX 280 as the guy who has 1st has a 45nm quad @ 3.7ghz, I have a 65nm dualcore @ 3.64ghz



http://img511.imageshack.us/img511/6281/83392671aj3.jpg

:eek: most impressive!! hell of a chip you got there, mate!!

[gurusan]

yup i'm very pleased with this gpu.

http://img72.imageshack.us/img72/7038/95393812jm5.jpg

[Caped Crusader]

just got my 4850 under water.

27c idle and 31c load :eek:

will be clocking later today

whal bloc are you using on the card? maker, model?

thanks :)

[gurusan]

I'm using a dangerden maze4. my first time with this block and I've pleased. Low restriction and excellent performance.

[HousERaT]

I'm using a dangerden maze4. my first time with this block and I've pleased. Low restriction and excellent performance.
How much voltage to get to 920 on the core?

[GAR]

Thanks for the bios GURUSAN, works good on both of my cards, these cards should be killer in crossfire now!!!

[DemonEyez]

yup i'm very pleased with this gpu.

http://img72.imageshack.us/img72/7038/95393812jm5.jpgNice going! :) How much are you feeding the core? and what would you consider safe for 24/7 with water?

[gurusan]

How much voltage to get to 920 on the core?

Nice going! :) How much are you feeding the core? and what would you consider safe for 24/7 with water?


Mixture of pencil and bios modding for:

1.18V idle
1.48V load

I set .94v in the bios for the idle state so that it would stay at a low vGPU when not in use :)
I think 1.5ish under water would be fine if you keep it at a low idle voltage like I did so that it's not always getting 1.5v

[GAR]

Mixture of pencil and bios modding for:

1.18V idle
1.48V load

I set .94v in the bios for the idle state so that it would stay at a low vGPU when not in use :)
I think 1.5ish under water would be fine if you keep it at a low idle voltage like I did so that it's not always getting 1.5v

Gurusan, with that bios you made, what can i use to get 1.4v under load to get me around 800-850mhz, can you show me a picture of a pencil mod??? keep in mind im using your bios with 1.2v load and 720mhz on core, thanks.

[gurusan]

Gurusan, with that bios you made, what can i use to get 1.4v under load to get me around 800-850mhz, can you show me a picture of a pencil mod??? keep in mind im using your bios with 1.2v load and 720mhz on core, thanks.

Check page 3 of the voltmod thread.

and update....I'm now at 950/1200 stable with the same voltage (1.48)

[biftek.]

for comparison :) should beat the GTX 280 as the guy who has 1st has a 45nm quad @ 3.7ghz, I have a 65nm dualcore @ 3.64ghz

http://img511.imageshack.us/img511/6281/83392671aj3.jpg

haha, I bet that guy with the GTX280 below you is pissed :rofl:

These cards are incredible. I'm going to pick up some after market cooling today :) Probably an S1 for now and eventually one of those T-Rad2's when they come out. Hopefully then I can hit some higher 700 core numbers, I'm barely making it at 730 temp wise. :(
Cards already v-modded for it, i have 1.28V load and 1.04 idle :)

[adpr_02]

Guru, did you change the voltage on your memory at all? I can't get past 1050 stable yet.

[gurusan]

yes i bumped it to 2.12v with the pencil mod.

[barong]

how about for maximum core without using pencil mods, only using RBE?

[D749]

Could messing around with BIOS flashing on a CF setup have any affect on whether the second card is utilized?

The reason I ask is that I had one 4850, flashed around with it (mostly just fan changes) after reading up on RBE, etc., and then threw in another 4850. Now the second 4850 will not fire up during gaming/benchmarking but it is detected by CCC and Vista. I even flashed both cards back to the stock BIOS.

http://www.xtremesystems.org/forums/showthread.php?t=192864

Thanks.

[Jaystar]

Has the pencil mod for vmem been posted somewhere gurusan

[adpr_02]

Here you go: http://www.techpowerup.com/articles/overclocking/voltmods/151

Is it just me or are some of the mods unclear in this guide?

[gurusan]

the mods seem pretty clear. what are you unsure of

[adpr_02]

Well, I was just looking over it. I already did all my wiring and just need to buy the resistors, but for some of the pencil mods I can't see where you're supposed to shade in.... maybe it's just me...:shrug:

OH GOD! I get it. hahaa. I feel so noob. I couldn't figure out that you have to shade around the resistor.

Amazing guide, though. Very clear.

[W1zzard]

look at where the tip of the pencil points? read the text below the image

[Jaystar]

The guide is a good one! Now I just have to wait for my new cooler to come :)

[gurusan]

Turned voltage down a tad to 1.45v load, 1.14v idle and now am at these clocks 100% stable :)

http://gpuz.techpowerup.com/08/06/28/gts.png http://gpuz.techpowerup.com/08/06/28/hre.png

[Jaystar]

Holy cow gurusan. You should try over clocking the pci-e bus some. With that much raw computational power. I bet games would respond to the slightly wider bus.

[gurusan]

The PCI-E bus is at 120mhz. I've read that overclocking it too much can cause hard drive corruption? Not something I need as I have important stuff on here.

[Rattle]

I am not having any luck clocking these cards, i think I got a couple of duds, or i dont know what I am doing wrong....

i am happy with them at stock anyway.

[gurusan]

What have you tried? With the accelero s1 you should be able to do some nice clocking.

[Rattle]

i cant even OC much in overdrive without artifacts, i have tried different modded bios with 1.4v, made my own and tried a couple I got here, i got artifacts at 675/1050 with 1.4v, not sure the voltage was changed though. my temps are great mid 50's tops

[gurusan]

that's odd.

Don't know what to say really :/

[GAR]

gurusan, if i want to overclock with your bios, the one you moded, all i change is whatever thats at 720 to whatever i like??

[gurusan]

^ yes :)

[GAR]

^ yes :)

You think i can do 750mhz with 1.2v with your bios????

[gurusan]

You think i can do 750mhz with 1.2v with your bios????

Possibly. I couldn't but a few users here have been able to i believe.

[GAR]

I tried the vmod where you shade in the resistor, no luck for me, i dont think it worked, how much do i have to shade in?????

[gurusan]

do you have a dmm? you NEED a dmm to know what you are doing

[revogamer]

gurusan, with the 900Mhz overclock, is that thru bios editing only? for the voltage.

[gurusan]

no i did a pencil mod too

[Zucker2k]

Crysis benchmark on Vista x64 and E8400 @ 4.5Ghz ~ 3DMark'06 is 21540

[gurusan]

wow very nice.

Try Dx10 very high noaa noaf now please

[Zucker2k]

wow very nice.

Try Dx10 very high noaa noaf now please

Okay, will try that next....

[Zucker2k]

wow very nice.

Try Dx10 very high noaa noaf now please

Here you go....

[gurusan]

wow those are amazing results. Especially the 16x AA !!!!!

I've just ordered a q6600 + P5Q deluxe so we'll see if that helps me at all :)

[Zucker2k]

wow those are amazing results. Especially the 16x AA !!!!!

I've just ordered a q6600 + P5Q deluxe so we'll see if that helps me at all :)

I don't know what board you're moving from but the 2 x8 lanes on the P45 should help. The Q6600 should help a lot too. Now, I just have to find a way to get both my cards to 900mhz on the clocks.

[Caped Crusader]

by god, that's almost playable Crysis!! :p:

[DemonEyez]

The PCI-E bus is at 120mhz. I've read that overclocking it too much can cause hard drive corruption? Not something I need as I have important stuff on here.
Because most onboard SATA controllers are connected to the PCIe bus, you're also overclocking the SATA bus. It differs from mobo to mobo, but on my DFI DK P35 for example, 115MHz is the max for the SATA bus. Go any higher and you get curruption, especially with Raid configs

[rocketr2]

Here you go....

gurusan: you score 30.74 on the same bench mark with only one card, just overclocked much more.

[jimmyz]

awesome results guys, great to see "the little card that could" kicking arse and taking names, these things are nice.

[Jaystar]

So an Arctic Cooling Accelero S1 + wire ties + yate = win !

Do you think these http://www.svc.com/gt-ram-kit.html combined with the sinks from the s1 kit will be enough to cover the pwm area.

[jimmyz]

So an Arctic Cooling Accelero S1 + wire ties + yate = win !

Do you think these http://www.svc.com/gt-ram-kit.html combined with the sinks from the s1 kit will be enough to cover the pwm area.

there is lots of room there so I guess yes but I don't use the cooler you mention so Ican't say for sure. mine has a few old Zalman blue VGA sinks and never gets very hot. Ram is naked btw I like my ram like my ladies naked all the time. the chips feel very cool and my clocks seem better without the factory cooler which covered them.

[vinteg]

gurusan. i just flashed your bios. all went well. problem is however that i cant turn off that frigin overdrive in CCC. i click apply and it just enables itself again. any idea on this problem?
srry if it was allready asked.

edit1: well bios sucks for me :( arti's all over the place. dont realy understand since temp stays at like 65°. i can imagine the core being more oc'able on one card other than mine but the mem should be around the same, no?

[JamesBong420]

@gurusan....

so u were actually 950 stable at under 1.5v?
i have to put 1.52v(load) for even 910mhz... :(

[biftek.]

Whats the max safe voltage for the ram?
I'm at 2.2. Thinking it's a bit overkill though looking at Guru results...

[jimmyz]

Whats the max safe voltage for the ram?
I'm at 2.2. Thinking it's a bit overkill though looking at Guru results...

general rule would be 10% so 2.2 personally I don't oc the ram too much as they generally don't help the performance much compared to the risk of death.

[biftek.]

general rule would be 10% so 2.2 personally I don't oc the ram too much as they generally don't help the performance much compared to the risk of death.

Awesome thanks for the quick reply, lowered it to 2.11V :)
Now time to OC it :up:

[tvdang7]

any visiontek ppl on here?

my stock voltage overclocks suck 675/1060. seems like every other vendor does 700/1100 + right out of the box.

btw whats the default 3d voltage?

[Bitgod]

Gah, wish I knew why my Crysis is jacked up, I'm getting worse numbers when doing 4850 CF than if I disable CF. COD4 is fine though, getting twice the FPS my 8800GTX did.

[XMoA]

@gurusan....

so u were actually 950 stable at under 1.5v?
i have to put 1.52v(load) for even 910mhz... :(

yeah but he's using liquid cooling :P

[Confused_User]

any visiontek ppl on here?

my stock voltage overclocks suck 675/1060. seems like every other vendor does 700/1100 + right out of the box.

btw whats the default 3d voltage?

i was getting bad clocks on my visiontek as well, worse than yours 670/1025.

when i flashed to the latest msi bios (160/500 2d clocks) i was able to overlock to 720/1075 100% everyday stable :shrug: :up:

[gurusan]

@gurusan....

so u were actually 950 stable at under 1.5v?
i have to put 1.52v(load) for even 910mhz... :(

I thought so but then it crashed after about an hour of gaming. But I am stable 910mhz 1.45v

[Rattle]

So an Arctic Cooling Accelero S1 + wire ties + yate = win !

Do you think these http://www.svc.com/gt-ram-kit.html combined with the sinks from the s1 kit will be enough to cover the pwm area.

the s1 rev2 ramsinks are the only thing you can use out of it, there's no pwm sinks that work, that thermalright sink set will be perfect for one card though.
Thats basically what i used left over thermalrights and some others I had laying around. I would grab 2 sets of spared though.

[Jaystar]

Thanks for the input guys. I agree you can never have enought ramsinks around. So two pwm sets it is.

On the subject of vram I bet the stock heatsink does heat that stuff up a good bit, but you get 8 litte ramsinks free with the s1. So I figure why not cover them.

Now these cards are pretty much built on the same 55nm process as the 3850 and 3870. So the chips should be able to tollerate similar voltages 24/7. Anyone have a volt modded 38xx series card still chugging away? If so how many volts were you applying. I still miss my 2900pro in that regard man she loved volts :up:

[gurusan]

i put about 1.45v through my 3850 every day since december 07 with no problems. SHe's for sale now too

[Jaystar]

i was getting bad clocks on my visiontek as well, worse than yours 670/1025.

when i flashed to the latest msi bios (160/500 2d clocks) i was able to overlock to 720/1075 100% everyday stable :shrug: :up:

The bios might have given you a little voltage boost. 1.16 -~> 1.21. I have a running theroy that this voltage was ment for overdrive but just doesnt work correctly on some bios. The only way you are going to find out is with a dmm. Wha