I would be happy with 1.4V.Quote:
Originally Posted by [XC]Atomicpineapple
My card has a very diferent layout from reference ones, I think Asus has 2 pcb models. :shrug:
I'll upload some pictures ASAP, hopefully somebody can help me modding that.
Printable View
I would be happy with 1.4V.Quote:
Originally Posted by [XC]Atomicpineapple
My card has a very diferent layout from reference ones, I think Asus has 2 pcb models. :shrug:
I'll upload some pictures ASAP, hopefully somebody can help me modding that.
For people searching for the pencil mod point for the new sapphire card,I've found it.At stock it was 1612 ohms,giving 1.24V .Setting it to 1185 gave me 1.34v.Also the points used for measuring the voltage are different,see the picure(I will use one that other user posted so I don't need to take pictures myself).I'm yet to confirm the memory points,but I'm quite sure where they are,I will post it when I get the necessary cooling for my memories(the stock one doesn't even have a heatsink attached to them).I think this card has great potential for overvolting,with the stock cooler running at 100%,at 1.34v(with no overclock),I get 65°C (GPU temperature with GPUZ) after running Atitool "scan for artifacts" for 5 minutes,and overclocked to 795mhz it gets up to 70°C.
http://img136.imageshack.us/img136/8...8zb5pe9.th.jpghttp://img136.imageshack.us/images/thpix.gif
Edit:I was able to get up to 795mhz on the gpu,more than that and some tiny artifacts started appearing on Atitool.When overclocked the voltage goes up a little bit,at stock clock it's 1.335v and overclocked it get about to 1.347v.People with the same card,please let me know your results.
hello all,i am new here :)
i have a His IceQ4 card with me which is said to have a different pcb design-
http://img.hexus.net/v2/graphics_car...rdrear-big.jpg
any pencil mods for this card?right now i am at 730/1100 can bench at 740/1125 temperatures don't go beyond 58C in ati tool and 51C in crysis with 100% fan.
Set your idle voltage with RBE to .892 and it will measure around 1.08-1.1v idle. That way the GPU only sees full voltage when gaming.Quote:
Originally Posted by adrift02
Quote:
Originally Posted by Death909
did you have any success the vmod ?
can you edit the follow image to show were did you solder? and wich measure point you use to check the VGPU voltage?
http://www.xtremesystems.org/FORUMS/...1&d=1221011918
THNX man! In the afternoon i try to do it. After i post my results.Quote:
Originally Posted by GamerBR
I mod your pic two + measure point:
http://img507.imageshack.us/img507/5...5pe9yh0.th.jpghttp://img507.imageshack.us/images/thpix.gif
I didn't get what you added,did you think that because I marked it black it's the negative point?If so,that's not what I meant,I use the multimeter at those two points to measure the voltage.If that's not it,is it another way to measure it?Between those two new points you marked?Quote:
Originally Posted by Brumi
I've increased the vgpu voltage from 1.345v to 1.375v and I'm still unable to get more than 800mhz with no artifacts,I don't know if it's the limit of the card or it's my cooling that's bad(I'm using the stock cooler at 100% and with no cooling at the ram),I'm waiting for a new cooler to arrive,so I will find the answer soon.
it could be cooling, also the VRMs get very, very hot. make sure you have something blowing over them
Befor the mod: resistor: 1,612Kohm vgpu: 1,24V (idle) / 1,29V (load) Max stable clocks: 700/2100 Max bench clocks: 730/2200
After the mod: resistor: 1,402Kohm vgpu: 1,24V (idle) / 1,32V (load) Max stable clocks: 730/2100 Max bench clocks: 760/2200
I try to set lower the resistance and post results.
2 added measuring point is the same that yours, but i easy to measure when the card is in my case.
@ stock voltsQuote:
Originally Posted by GamerBR
http://i19.photobucket.com/albums/b1...aler/th_32.jpg
RtHDRibl 1:30H
Crysis Warhead Benchmark 20 tests
830/4400 (im still testing...830/4600 is stable too)
fan @ 35% +-
I meant for the non reference sapphire hd4850:p:Quote:
Originally Posted by Unrealer
I couldn't get the resistor anything below 1481 K ohm using just pencil,you probably can do it trying with several different types,but I have some conductive glue here,I'm using it,I just pour a tiny amount over the resistor wait it to dry(a few minutes) and measure it,after several tries I was able to get the resistance that I wanted.Quote:
Originally Posted by Brumi
I was unable to find how VRM looks like,but I think it's the two gray blocks on the picure,right?Looking for the picture I've found the picture for the reference card too and it has 4 of it and they are smaller,I'm not sure if having less and bigger is better or not(probably not).Quote:
Originally Posted by gurusan
http://www.overclockersclub.com/vima...50_dual/20.jpg
Double post :(
FrontQuote:
Originally Posted by NBF
http://img517.imageshack.us/img517/4...1534hn6.th.jpghttp://img517.imageshack.us/images/thpix.gif
Back
http://img411.imageshack.us/img411/1...1571pk7.th.jpghttp://img411.imageshack.us/images/thpix.gif
Closer look
http://img411.imageshack.us/img411/2351/clhf1.th.jpghttp://img411.imageshack.us/images/thpix.gif
I hope it's good enough, if you need other pictures let me know :D
@ photo named Closer look what is written on the two chips ?
Ap-AG BD_AF and what else ?
AP-AG V1FQuote:
Originally Posted by Vatos_locos
BD-AF J1Z
crap i cant find anything for those :S
on the back the first chip on the upper ft side its next to BD-AF J1Z what is written on it ?
Thanks for your help Vatos_locos :up:Quote:
Originally Posted by Vatos_locos
I hope its readable
http://img513.imageshack.us/img513/4872/cl2us6.th.jpghttp://img513.imageshack.us/images/thpix.gif
What is the default voltage on the 4870? I would really like to know and modify my 4850 to the same.
I have gone as far as 1.3v and couldnt even get my cards stable at 725 Mhz.
No, they are the 8 black chips on the left, they need active cooling when clocking.Quote:
Originally Posted by GamerBR
It already has an heatsink,so all I need to do is add a fan to it.:).By the way what's the gray block then?Quote:
Originally Posted by gurusan
The gray blocks are inductors - passive components, a bit like capacitors.
I decided to post where I think it's the point to use to increase the memory voltage also,I haven't tried myself but I'm quite sure it's there.Why?It's exactly the same resistor of the reference card,R710.That's how I guessed the point for increasing the gpu voltage(the indications on that case was harder to see,on the memory it was much easier),I just didn't do it because I have no cooling for the memories yet,if no one confirms it's there before me I will do it in about 1 week when my new cooler and ramsinks will arrive:) .Please,as it's not impossible that the point is wrong,measure the voltage before,change the resistance very slighly and see if there is an increase on the voltage,if there is,it's there :up:
http://img261.imageshack.us/img261/7...9wr6uv1.th.jpghttp://img261.imageshack.us/images/thpix.gif
I could set the lower resistance, with a 2B pencil.Quote:
Originally Posted by Brumi
Resistor: 1,263Kohm vgpu: 1,29V (idle) 1,37V (load) Max bench clocks: 800/2250
I try the memory pencil mod in the afternoon. After i post my results.
My card cooling:
http://img524.imageshack.us/img524/6...0113tk4.th.jpghttp://img524.imageshack.us/images/thpix.gif
http://img524.imageshack.us/img524/4...0114he1.th.jpghttp://img524.imageshack.us/images/thpix.gif
http://img183.imageshack.us/img183/2...0115lx4.th.jpghttp://img183.imageshack.us/images/thpix.gif
http://img525.imageshack.us/img525/4...0117pc8.th.jpghttp://img525.imageshack.us/images/thpix.gif
Are you getting any variation between stock clock and overclocked?If so,which one is the one you are posting?Nice setup there,what are the temps you're getting?
I'm going to Vmod my HD4870. The point, where FB heads to isn't the best but doable. Tho I can't find any spot, where it also goes. There should be some resistor that connects FB to GND? :rolleyes:
I measured huge amount of components front and back the card but no go...
http://ceemic.pri.ee/hardware/hd4870/hd4870_03.jpg
http://ceemic.pri.ee/hardware/hd4870/hd4870_09.jpg
And yes, FB->GND resistance is ~2,6ohm, so 50ohm VR works ;)
i know i will be coming back to this thread once i get WC for my 4870!
OK, Vgpu mod done and working :)
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_01.jpg
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_02.jpg
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_03.jpg
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_04.jpg
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_05.jpg
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_06.jpg
http://ceemic.pri.ee/hardware/hd4870/hd4870mod_07.jpg
Maybe I'll do mem mods also...
looks very nice :clap:, where did you pick up that circuit board and switch? my local radioshack has bullocks for usable parts :(Quote:
Originally Posted by ceemic
sweet but that switch shoul have loss of current on it.
Barr3l Rid3r, what do You mean with that exactly? Ofcourse it will add a little resistance but in the end it sums up with VR and doesn't really mather...
I wasn`t talking about resistance and decreased voltage, I`m talking about current.Quote:
Originally Posted by ceemic
it's not so bad the current at the core voltage is not huge to create a problem with the switch :rolleyes:Quote:
Originally Posted by Barr3l Rid3r
I`ve learned that since I`ve modded mine MSI K8N-Neo2 w/ Directwire 3.3v mod to feed mine BH-5. I`ve used an ordinary switch first and computer wasn`t stable and I`ve seem little to none OC gain...Quote:
Originally Posted by Vatos_locos
When I changed for a bigger and more professional switch, all the good was born... stability and much higher BH-5 OC then before...from 230Mhz Cas 2 5-2-2 to 280Mhz x2 Cas2 5-2-2 1T.
Ok, older DDR chips must probably consume more current and power then todays GPU... but it might interfere anyway
I have used these switches many times before in motherboards and graphics Vmoding. No instability or something like that so far :)
Also Jaan uses them (he is truly one of the best Vmoder ever ;) ).
hey guys, biosmod possible for vgpu on 4850/4870?
certainly not on the 4870Quote:
Originally Posted by jaredpace
There's a big difference between feeding a power circut & altering output voltage with a FB mod ;)Quote:
Originally Posted by Barr3l Rid3r
Quote:
Originally Posted by G H Z
I got it now, thanks preatty clarifying
Barr3l Rid3r 3.3 with 1.x Voltages is a big difference in current all tho the switch is not a problem at all it is a simple switch wen it is on it has no resistance to hold the current and the Ram's current is mush more than on one vga's core and everything that G H Z said it is a different think :)
Memory Vmod is working on my 4850, running at 1165 so far.
But I still can't figure out VGPU mod by myself :(
I would appreciate any help.
http://img513.imageshack.us/img513/1...3memog2.th.jpghttp://img513.imageshack.us/images/thpix.gif
Has someone done Vddc and Vddq mod for 4870? How much You gain in overclock?
Or is it pretty pointless to do that?
I also wanted to know. :confused:Quote:
Originally Posted by ceemic
Guys, I am taking Black Screen with the Core at more than 815MHz, it's just more work when the memories of over 1065MHz, because it occurs? It is stable under FURMARK.
And if I did the Mod vGPU to try to go to 870MHz, even then I would have problems with BSOD? :shrug:
Right, finally managed to obtain a trimpot of reasonably correct resistance. Jaycar kept selling me 5k trimpots when asked for 100k. I did the memory voltmod a week ago however.
Going from 2.05v to 2.13v (with a 2k trimpot at max resistance this happens) doesn't really allow much of a higher overclock. It's as stable at 1160 as it is at 1140, but it still artifacts after 30min. I have to say, I'm not impressed with the thermalright hr-03 gt severely impeding the cooling of 3 ram ICs.
Since I only did the Vgpu voltmod yesterday night (at 2am, only woke up like half an hour ago), I don't have as much of a conclusion yet. Boosting the voltage by 40mv or so appears to net stability at 780mhz instead of 750mhz, but I haven't really pushed it (that and it's summer in Australia now, and I'm look at ~47 degrees right now on one of the gpu temp sensors, instead of the previous ~38 degrees I was seeing like two weeks ago).
Someone requested a visual description of the voltmod? The added blue line shows where I soldered (onto one side of what I think is a capacitor). The added light green dots show what I think might have been some other possible solder points, but I think there's one missing, and I'm only really sure about the top left one, since I attempted to solder there.
http://img127.imageshack.us/img127/8...rontye2.th.jpghttp://img127.imageshack.us/images/thpix.gif
I used a 100k trimpot instead of a 200k trimpot, and I'm getting the impression that maybe I should have gone with 50k. The NCP5388 advertised a different form of error correction (for one thing, the circuit diagrams in it's datasheet don't have a resistance to FB from ground and from Vgpu, instead they connect through resisters and capacitors to pin 20 and pin 18). Regardless, switching on the voltmod with the trimpot at 100k results in a 10mv jump, and a lot of trimpot turning was required for 40mv.
(Excuse the lack of concrete voltage measurements, I was using a different ground point and the measured Vgpu under load was different from my previous measurements, so I instead recorded the difference between the voltmod being turned off and on.)
Some interesting news,the new CCC has control over the voltage of the gpu.With the 8.9 I was getting 1.38V with the pencil mod,but I wanted to lower it a little bit,so I flashed the bios with a lower voltage,and I could get the voltage lower.Now after formatting my PC and installing 8.10 I noticed the voltage wouldn't go down from 1.38V,tried flashing it with the lowest possible option from RBE and it still wouldn't work.Then I tried disabling CCC startup,the voltage would get lower.After trying some different things,I discovered that only if Overdrive was enabled that would happen,so what it does is put the maximum possible voltage while overclocking(pretty much useless,it already max the voltage while on load,I don't get the point here).It would be nice if someone was able to hack this to include voltage selecion somehow while in Windows:)
Now I'm going to have to redo the pencil mod because of that:(
Well I attempted doing the pencil mod via TechPowerUp's instructions for the HD4850 and it did not go well at all :(
I've since erased and cleaned with alcohol the pencil traces in hopes of reviving my GPU but that didn't help either.
Basically I have total screen corruption. Some random characters with a few that are readable along with some funky colours. It's also extremely low resolution (or high?) that my LCD cannot display it at times. It doesn't work at all using pure DVI, but I can get the above stuff using DVI-to-VGA.
I'm assuming there's no way to fix this, but if there is a way, I'm willing to try. I'm not exactly expecting a response from Diamond anytime soon.
I bet you did it by eye without a multimeter to measure the before and after resistance,you probably make it go to low,damaging the gpu by excess of voltage.Quote:
Originally Posted by jdrom
Yeah =/ I've definitely learned my lesson though.Quote:
Originally Posted by GamerBR
The way TechPowerUp made it sound was that the maximum it would do was 1.4V so I thought it wouldn't do any harm but I was surely wrong assuming that.
Which one do you have? The EAH4850 512M with 3 phase pcb or the EAH4850 TOP with 4phase pcb?Quote:
Originally Posted by [XC]Atomicpineapple
I was under the impression that the Asus EAH4850 TOP uses a 4 phase pcb design. Can anyone confirm this? These pictures are from the Asus website and show 4 phase pcb for the TOP and the 1024MB cards, only the 512MB uses 3 phase:Quote:
Originally Posted by NBF
http://img380.imageshack.us/img380/8...tdi512mla7.jpg
http://img363.imageshack.us/img363/6...tdi512mwc0.jpg
http://img363.imageshack.us/img363/9...0htdi1gmd2.jpg
I planning on buying a second HD4850 for running crossfire with my first Asus Reference HD4850, which has been voltmodded and runs at 850/1150.
I didn't read this topic (and others) for a few weeks and now to my surprise its realy hard to find those reference pcb single slot HD4850's
I'm going to voltmod the card so i'm looking for a card that has a working voltmod for it. So with all of this in mind , I thought I had the found the right card for the job in the EH4850 TOP
Asus EAH4850/HTDI/512M has 3 phases.Quote:
Originally Posted by DemonEyez
Both EAH4850/TOP/HTDI/512M and EAH4850/HTDI/1G have just 2 phases, not 4 (inductors ≠ phases).
What did you ask from Diamond? To help with a vmod?Quote:
Originally Posted by jdrom
:clap:
Don't know why the top would have less phases :shrug:Quote:
Originally Posted by largon
I can't mod the 3 phase so far, maybe would be better sell it.
I need to do my home work better :) You're right. The EAH4850/TOP/HTDI/512M and EAH4850/HTDI/1G both use a 2-phase double choke design. So that would mean these cards still also use the ATI reference PCB, right?Quote:
Originally Posted by largon
Anyone here have a gigabyte 4870? Do you know what mem modules they use? How does the card clock?
The exact opposite, nothing at all. Trying to get it RMA'd (I know, it's dishonest but I'd rather not have a $200 paperweight).Quote:
Originally Posted by largon
I think reference 4850 uses an 4 phase designQuote:
Originally Posted by DemonEyez
Barr3l Rid3r,
No, reference 4850 is 2 phase.
Attachment 87372
So Techpowerup is mistaken in this review?:
http://www.techpowerup.com/reviews/H...ages/vreg2.jpg
The reference design HD 4850 cards all used a three phase power design which tended to get quite hot. HIS went with the four-phase route which distributes the load over more components.
http://www.techpowerup.com/reviews/H...0_IceQ4/4.html
Those are really low temps. How does it perform with the stock heatsink without the GPU hs?Quote:
Originally Posted by DemonEyez
And more importantly, what was the room temperature and air flow like?
Yep.Quote:
Originally Posted by DemonEyez
Infact, that HIS card is a reference board - just blue that is. The card's a carboncopy of Powercolor or MSI.
edit:
The phase controller on HD4850 is the uP6201 which supports upto 2 phases...
;)
edit2:
Good thing you mentioned about the TPU article... I'm an editor there so I can correct the article. edit3: Aww... W1zz has locked the article. I'll just notify him.
=)
Room temperature was 21 degrees Celcius and the card has an 80mm fan @ 1000 rpm pointed at it. Mind you that 700MHz for the GPU was pre voltmod and pre bios mod.Quote:
Originally Posted by Blazing fire
If I remember correctly the temps with the orginal stockcooler were around 90 degrees for the GPU at full load before I did the mods and all :)
Only had it running with the stockcooler for one day:D
Nowadays it's been voltmodded to 1.37v for 850/2350 during load, which gives me around 40- 43 degrees stressed.
Same here :(Quote:
Originally Posted by NBF
Asus EAH4850/HTDI/512M with 3-phase PWM. Can't figure out these controller IC's :mad:
I even tried to measure several points, but makes no sense to me.Quote:
Originally Posted by ceemic
Im about to give up, beaten by some freaking ICs... Cant believe it. :shakes:
I'll probably solder VR's for every IC leg and start to test which changes Vgpu :D
I won't give up, I have LN2 pot for that card waiting :p:
ceemic,
Try the pin in top left corner of the 16pin "AP-AG" in NBF's pic...
;)
largon, tnx again!
http://ceemic.pri.ee/hardware/hd4850_2/hd4850_01v.JPG
Use 100k or 200k VR. I'll do the mod ASAP and report back :)
I'm having some issues here,my card works just fine with AtiTool,no artifacts at all,also using FurMark while in XtremeBurn it's just ok too,but while playing Crisys it will often during game play just hang the program,with some less times hanging Windows(with a blue screen,talking about the driver entered in a loop),any idea what to do here?My sensor(mainly MemIO)is really hot,while in xtreme burns it gets up to 95,and while in AtiTool up to 90°C,but as far as I know this card can take that just fine,can't it?
Also my voltage and clocks are not that high,760/1078(HD4850)
EDIT:Problem solved,I bought a Zalman VF900CU to put on it and apparently it doesn't have a good contact area with the die with the general amount of thermal paste that is needed to used,I added a thicker layer and now I'm getting much better temperatures.
I haven't got time to mod my Asus, but friend of mine gave me his two Gainward HD4850 512MB Golden Sample :p:
http://ceemic.pri.ee/hardware/hd4850...4850gs_05v.jpg http://ceemic.pri.ee/hardware/hd4850...4850gs_07v.jpg
http://ceemic.pri.ee/hardware/hd4850...4850gs_09v.jpg http://ceemic.pri.ee/hardware/hd4850...4850gs_10v.jpg
http://ceemic.pri.ee/hardware/hd4850...4850gs_13v.jpg http://ceemic.pri.ee/hardware/hd4850...4850gs_14v.jpg
http://ceemic.pri.ee/hardware/hd4850...4850gs_15v.jpg http://ceemic.pri.ee/hardware/hd4850...4850gs_17v.jpg
Other pics: http://ceemic.pri.ee/hardware/hd4850gs/
Def Vgpu changed (idle/load) 1,194V/1,214V -> 1,207V/1,221V
:)
Good work ;)
bartx, tnx :)
hi,Quote:
Originally Posted by ceemic
you have perfect profile photo?
THX
sapphire @ powercolor bios/stock cooler/air/vmods
http://img512.imageshack.us/img512/536/9701100np1.gif
G-UNIT91, what profile?
NapalmV5, what Vgpu? 3D stable?
i wish.. can bench anywhere from 900-940 core/~1090 mem
havent monitored voltages
I'm referred to profile for view the height of all components (GDDR; mosfet etc.).Quote:
Originally Posted by ceemic
I must make a little toy..:D
G-UNIT91, why You need that?
Quote:
Originally Posted by largon
Well so why its more stable, cooler and allow higher OC at same voltage then average 4870 using 3 phase digital VRM?
What's your highest gaming stable clock? And what do you mean you haven't been monitoring voltages? :shocked:Quote:
Originally Posted by NapalmV5
I'm working on handmade's cooler:DQuote:
Originally Posted by ceemic
Phases aren't created equal.Quote:
Originally Posted by Barr3l Rid3r
Dude, you're my hero. I just got this card few days ago and was searching for some mods. Nice pictures!Quote:
Originally Posted by ceemic
Are you plannning to do a voltmod for the ram also?
DemonEyez, these are my friend cards. He only wanted Vgpu mod. Vmem mod doesn't help alot. Also, it has 0,8ns chips which overclock better :)
yeah I know. Did some testing and I can do 1175MHz on the 0.8ns Samsung chips.Quote:
Originally Posted by ceemic
If I do 1200 I get instability. So I was just wondering if these Samusng chips like more voltage.
Any idea how much they run on at stock speed?
And just to be 100% sure, this is vGPU mod right? :
http://img530.imageshack.us/img530/1...intmedido6.jpg
Yes, You can use all these points:
http://ceemic.pri.ee/hardware/hd4850gs/hd4850gs_04m.jpg
I soldered over the two point marked with blue lines :)
nope no monitoring.. lolQuote:
Originally Posted by gurusan
gaming @ 900/1075 comfortably
NapalmV5, have You done cap-mod for HD4850 also? :)
please ceemic :(Quote:
Originally Posted by G-UNIT91
G-UNIT91, these were my friend cards. I don't have them anymore and can't do pics...
ah ok, sorry:p:Quote:
Originally Posted by ceemic
Have you tried this mod?Quote:
Originally Posted by ceemic
I had litlle time to play, just set the VR to give 10,5K OHM, but it didn't seem to raise VGPU. Haven't double checked it yet, but I wonder if it worked for you.
NBF, no, I haven't had time yet.
But try to lower resistance more. Sadly I can't be sure if that is 100% the FB pin :(
hi @ all, I'm new here in this great forum.
Have some questions because I want to mod my Gigabyte HD4850 reference design. Its my first mod ;). I have a water-cooled system, PA120.3 + Laing Ultra.
Which is the best cooling solution for me, with a reference voltmoded 4850? I don't want to spend additional 100€ for a GPU w nearly the same price. Tought about 50-60€.
Shoud I buy a Swiftech MCW60-R universal Rev. 2 (42€) + little Ram an VRM coolers (where to buy?) - or shoud i buy the Heatkiller Watercool HK GPU-X2 Ati 4850 LT for 59€?
http://www.aquatuning.de/images/prod...140/4437_0.jpg
Is the cooling performace of the HK good enough to clock the card towards 850-900 Mhz? Mem + VRM cool too? Don't know if the reference design HD4850 can do this. Especially the VRM, what can i do to hold them on low temps? Will the Swiftech the better solution for me? May i able to use the Siftech on comming GPUs again?
Perhaps somebody have the time to list what i've to buy for ideal cooled OC HD4850.
Thanks a lot ;) - sry for my bad english
Greedz from Germany
Edit:
Bought a Swiftech MCW60-R + 2 Zalman ZM NB47J and 2 Zalman ZM-NB32K witch I will cut into pieces and fix onto the phases and VR
Edit2:
Card is here, goes for 700/1100 without problems in renamed Furmark (~4900 points on standard settings). Fan at 90% für benching. No Mods done so far, standardcooler. Watercooler an resitors will come on friday. =)
I'm needing some assistance here,I was trying to discovery an alternative point of soldering for my non reference sapphire card(it does not have that "big" pad like the reference one),so I followed the trace and discovered one resistor that with my multimeter was measuring exactly 0,so what I did was to remove it,make a bridge between the points and solder a wire to it,after that the card doesn't boot anymore,which doesn't seems to make any sense,any idea what might happened?:shrug:Also I lose the resistor so I can't put it back anymore,can anyone please measure the resistance of R656 so if it's not zero I can solder a trimpot to the points and set the original resistance?It doesn't need to be from the same card,any reference card will almost for sure have exactly the same resistance I'm looking for.
Thinking better,the problem might not be that,I tried to use "conductive" glue on the leg of the chip(it does not conduct very well,about 1000 ohms),after seeing that I would not be able to use it I cleaned as much as I could(apparently there is no glue left),but some of the glue might have flow underneath the chip,can anyone please measure the resistance between these two points to see if that is my problem(the last leg and the one left to it)?Again,it does not need to be from the same card,any reference one should have the same resistance.
http://img296.imageshack.us/img296/2...8zb5dq9.th.jpghttp://img296.imageshack.us/images/thpix.gif
my unmoded reference card with standard voltages and only fan mod does 730/1100 , more not tested yet. Furmark gives me about 103 °C without errors, tested crysis for about 2 hours stable with about 95°. MEMIO is always the highest temperature. Idle 75° fan @ 20% load fan @ 95%
@GamerBR : i can measure this resistor, but can u please mark it on the picure, cant find R656 atm.
If possible contact me, via ICQ #46700077 cause i am only here from time to time, and i think your request is urgent?
I added you on ICQ,but I don't have it installed here anymore,so I entered on ICQ2Go,apparently you are not online now.I suppose you have the same card as mine right?I marked on the picture which resistor it's.Could you also please measure the resistance between the other two points marked?Now I think it's more likely that this is the problem,it doesn't make much sense that removing a resistor with no resistance at all and linking the points with solder could make the card stop working.Quote:
Originally Posted by Gangsta73
http://img122.imageshack.us/img122/6...8zb5kj3.th.jpghttp://img122.imageshack.us/images/thpix.gif
Thanks for the help:up:
http://ceemic.pri.ee/hardware/hd4850_2/hd4850_01v.JPG
I just tested it and IT DOES NOT WORKQuote:
Originally Posted by NBF
That's not FB. Also I moded pin #1. No go :(
Sad news :(Quote:
Originally Posted by ceemic
I was hopping that I had done something wrong.
Back to starting point, unmoddable card :shakes:
NBF, that's pretty bad yeah :(
But I will do what I promised: I'll solder VR to every pin and start to look which works ;) 2 down, 14 to go :D
I hope you find the right one :DQuote:
Originally Posted by ceemic
Seems like you are pretty shure the AP-AG controls VGPU, otherwise we would have extra 24 pins to check on the BD-AF :ROTF: