700mhz wall on HD4850 is smashed.

[fenomenhaa]

It clearly states that Crossfire is disabled. Like an inch away from your question.

Nice score.

Yeah.I Have only one

[Gator!]

mine went wrong wont even loa into windows, i saved the original bios on my flash drive anyway i can fix this?

[DJSUB]

just want to ask how do you guys install the accelero s1 rev2 on hd4850? do you install the voltage regulator heatsink or just the ramsink?

thanks

[DJSUB]

does pencil mod could kill the card? what pencil to use?

thanks

[Ruiz]

Catalyst 8.7 is working for bios moded cards?? I had problems before with 8.7beta, só i did not risk installing 8.7 yet.

[stangracin2]

yes it is working

[Moty]

well emm.... still no soft-ways to change clock's above 700? Science I am 64-bit user i would have to use floppy-drive each time i would like to change clocks...

[alioth]

a new ATT is going to be work in progress

[biohead]

well emm.... still no soft-ways to change clock's above 700? Science I am 64-bit user i would have to use floppy-drive each time i would like to change clocks...

USB stick DOS boot is pretty quick imo. Doesn't AMD GPU Clock Tool work for you ?

[splatch]

Hi all

Got i small problem.

I got 2 sapphire radeon 4850 card.

I flashed them today with the same bios.
That I would like to do is to get the powerplay to work with 160/500 in 2d and 625/993 in 3d
And some ajustments on the fan speed.

My first card is god, and it is working nice..


But I cant get my second card to work the sama way, my fanspeed is good, but my 2d/3d does not work with it.


What is the problem?
And do anyone have a bios to give med that is working with 2d/3d that way?
I dont want to overclock it now, just want the 2d/3d to work like I wrote.. 150/500 in 2d and 625/993 in 3d.
The fan speed I can make on my own. Thanks.

My card is a Sapphire HD 4850.

And hey.... my 2d/3d with my good working card nr1 is NOT working when I put it in a other computer... now its back to normal/original in 2d (500/750)

Wth is this?
Or what is the problem? =)

Do I need to change something else but the clock1 in RBE_112 to get the 2d/3d to work?
And I got ATI Overdrive off.

Is that right?

[splatch]

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/12540238...phire.rom.html

I have try this out, and I can not get the 2d/3d to work unless I enable ATI Overdrive.

How in the world do u have ur bios using 2d/3d without using ATI Overdrive?
Is that possible?

Then please post this settings for me or post ur bios.... someone, anybody.
I use a Sapphire card (4850)

[chad]

I need help please. When I flash my bios to 770/1125 it shows up in gpu-z under the sensor tab as 770/1100, but under the graphics tab as 770/1125. I also am using the AMD GPU tool, its the same problem. I will set the gpu to 770 and the ram to 1125, but only the gpu is getting the overclock. Any idea what is going on, I would really like to see what the ram will overclock to.

[chad]

This is what im talking about, see in gpuz his memory is 1225 and under the sensors its also 1225. Mine is 1125 in gpuz and 1100 under the sensor. Even after a bios flash it wont change

Somebody wants to know quad:4ghz and 900core on 4850 so this is the answer
vgpu:1.48
vddr:2.05

[binormalkilla]

I have try this out, and I can not get the 2d/3d to work unless I enable ATI Overdrive.

How in the world do u have ur bios using 2d/3d without using ATI Overdrive?
Is that possible?

Then please post this settings for me or post ur bios.... someone, anybody.
I use a Sapphire card (4850)

What clocks do you want? Here is a Sapphire BIOS modified to run 160/500 2d, 500/700 UVD, and 750/1150 for 3d with 1.2V set in BIOS......however on my card it reads 1.17V using a digital multimeter....haven't figured out why yet.
I'll be hard modding soon so I guess it doesn't matter.....though I would like have the max voltage I can....

[splatch]

What clocks do you want? Here is a Sapphire BIOS modified to run 160/500 2d, 500/700 UVD, and 750/1150 for 3d with 1.2V set in BIOS......however on my card it reads 1.17V using a digital multimeter....haven't figured out why yet.
I'll be hard modding soon so I guess it doesn't matter.....though I would like have the max voltage I can....

I want 160/500 in 2d and stock on 3d.
Fan controll can I do for my self.

But I cant get the 2d to work without ATI Overclock on.

and I want 2d(150/500) to work without ATI Overclock on.
Does that work so?

[Viilutaja]

I have Sapphire HD4850 as well, and under load it changes from 1.098v ~1.10v (tested with Crysis GPU bench). Memory voltage was 2.0v

[LuxZg]

People, just wanted to say I gave up from voltmodding 4850 cos of possible problems with PSU as some members warned me earlier. Instead, I've invested money that would be going for 4850+new PSU into new 4870, and it works fine with my chieftec 450W, even when both GPU and CPU are overclocked (3.2GHz CPU and 780/1090 GPU/mem). So just wanted to give heads up if anyone else is wandering about their PSUs... maybe it's not good enough for voltmoding to 1.5V and 1GHz, but it's probably just fine even for 800+ non-voltmoded 4870..

Anyway, thanks for your thoughts and help everyone, I'm happy now

[SmaKKed]

Thanks Guys, after getting a crappie clocker on my Sapphire 4850 most stable was 680/1150 now after a flash to increas voltage i am happily at 720/1150

[GAR]

what do you guys put for voltage, 1.263v or 1.400v ????

[Factotum]

for maximum voltage for GPU in 3D in bios must stay 1.158 for 3D. I tested it on 2 sapphire 4850 - get 1.21V for GPU. If Vgpu>1.158 in bios - run OCP and core voltage kick on 1.1V.
without bios editing:
If CCC installing, run windows task manager and determinate proces CCC.exe, open c:\Documents and Settings\<User NAME>\Local Settings\Application Data\ATI\ACE\Profiles.xml and edit <Property name="Want_2" value="1158" />, save it and run CCC - core voltage 1.21V so

[Factotum]

what do you guys put for voltage, 1.263v or 1.400v ????

1.263V - 700-790MHz, 1.4V - 790-850MHz

[Mysterfix]

what do you guys put for voltage, 1.263v or 1.400v ????

1.263v in bios will get you the max available to your card without a hard mod. For me I run .94v set in bios for 2d clocks, which gets me 1.10v actual with mods installed and I'm currently testing at 1.3v for 850mhz, these cards seem to be getting stronger as time goes on. It used to take me 1.5v for 900mhz but I've been stable with 1.45v for the past few days.

The ram on these 2 cards is crazy! I can run 1188mhz on default voltage so far on both cards.

[janolle]

Have you guys tried high AA settings after overclocking? Using AA in certain games really kills stability with my 4850. When playing GRID with highest AA setting I have to lower my clocks from 700/1125 to 645/1025 compared to not using AA. Maybe it's the way these cards do AA, I read something about it stressing unused parts of the GPU and not the memory.
Anyone experiencing similar problems?

[Caped Crusader]

Hello good people!

Sorry for n00b question, but... Is VRM cooling absolutely essential? I ask that because I recently swapped my 4850's stock cooler with a ZEROtherm GX-820 overclocker's edition - I know it's nothing really special, but it was a good deal. The package didn't include VRM/capacitor heatsinks so I ordered these:

http://www.quietpc.com/gb-en-gbp/pro...olers/zt-zh100

Which happen to be out of stock at the moment. I still did go ahead and installed the regular RAM heatsinks and cooler, but I left the VRM's naked.

I'm with MSI's modded BIOS (max vGPU possible through BIOS) at 715/2200Mhz and I'm getting some crashes after gaming for a while... ATITool tests ok, artifact free, 3DMark Vantage also runs smooth even at 720/2200Mhz.

Maybe its the VRMs that really need some heatsinks, what do you guys think?

EDIT: As for temperatures, I got 48 ~ 50C idle with the fan at minimum RPM, and 68 ~ 70 load with ATITool. With max. fan RPM I get 43 ~ 44 idle and 60 ~ 62C load. I'm also running the card with latest 8.7 Catalyst drivers. Can it be the drivers? Last week, with the stock cooler and DNA 8.6 drivers the same game didn't gave me problems... I'm thinking here: either it's the VRMs getting too hot or these 8.7 drivers messed up something... Also, Crysis started refusing to load (MSVCR80.DLL error)... I dunno what's wrong here...

[HousERaT]

The ram on these 2 cards is crazy! I can run 1188mhz on default voltage so far on both cards.

Is that Qimonda or Samsung memory?