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CL3P20's Winter VMod Sale !! GPU's and Mobo's - Page 7  

post #61 of 282
Quote:
Originally Posted by CL3P20 View Post


9800GTX + mods = 800-900+mhz on water for core speeds...shaders are dependent on what overall load temps will be like...it is very common to see bench runs on vmod'd GTX's with shaders in the 2200mhz range...for folding use on water though you should be perfectly stable around the 1998-2052mhz range.

IMO, my GTX is water-cooled running below stock voltage at 800c/1998s/1175m for gaming use daily...folding at 790/2052/1150. pulls ~6.4k on the 700 point WU's and just over 7k on the 353's.





If you have a mobo you would like to mod..please, let me know. My solder station does not discriminate against PCB
HOLY . . .
You are pulling more than a stock GTX 285 in some situations!
post #62 of 282
Quote:
Originally Posted by CL3P20 View Post
I believe OCP hits at 1.4v...but I would not run more than ~1.25-1.28v on air. Shader clock speeds might be limited still depending on temps though...those GPU's are jam packed with shaders..and the funky core straps can make it difficult to 'nail' the clocks you want sometimes if your cooling is not up to keeping the shaders cool.







Since shaders are locked with the core speed...you might be at a cooling limit and not a voltage limit..same happened with my 4850's...regardless of voltage, they would not clock beyond 865mhz....with load temps @ 41c
I believe I was on the 756 MHz strap (743 requested) with linked shaders, I would not see over 34c in heavy use. (1200 memory). I still need to Furmark it etc. But the other Hydro on here, after he reapplied TIM like me, he has run Furmark, and he gets the same 34c max. Does that not bode well?

Edit: I will wait until I have more screen captures, to solicit your opinion, with regards to my specific situation (I can imagine you would not want to say other than generally, without more specific info).

People were complaining that the HydroCoppers were only OC'd to 600 MHz from the factory, but mine seems destined for a big OC.
Edited by Clockadile Dundee - 10/27/09 at 9:28am
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post #63 of 282
Quote:
Originally Posted by CL3P20 View Post
Shaders need to be cold...and with soooo many of them packed together..they build internal heat quickly. Its just like CPU cache...if you look at a E7xxx @ whatever speed, with X-vcore, compared to an E8xxx at the same speed and vcore, typically the CPU with more cache has the higher internal temp...and can hit temp walls sooner as well when OC'ing.

Same can be said for GPU's... the more shaders, the more internal heat is build-up. This is why a GTX285 will not hit 2100mhz shaders on water cooling...there is just to much heat build-up going on for them to be stable there.

IMO- If you provide more voltage and cannot get the GPU stable...and temps are great..you may be at the clock limit of the GPU's core...or simply a temp limit for the shaders.
soo...... couple of intel fans on the back side should help
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post #64 of 282
Thread Starter 
Quote:
Originally Posted by firestormcomputers View Post
HOLY . . .
You are pulling more than a stock GTX 285 in some situations!
...thats stock GPUv with water cooling...I have not adjusted GPUv over the stock voltage of 1.2v so far.



Quote:
Originally Posted by Clockadile Dundee View Post
I believe I was on the 756 MHz strap (743 requested) with linked shaders, I would not see over 34c in heavy use. (1200 memory). I still need to Furmark it etc. But the other Hydro on here, after he reapplied TIM like me, he has run Furmark, and he gets the same 34c max. Does that not bode well?

Edit: I will wait until I have more screen captures, to solicit your opinion, with regards to my specific situation (I can imagine you would not want to say other than generally, without more specific info).

People were complaining that the HydroCoppers were only OC'd to 600 MHz from the factory, but mine seems destined for a big OC.
Maybe there are other voltages here that need to be adjusted for stability @ higher clocks.. I have been reading some threads over on XS, specifically on the vDDQ mem voltage and its relation to the memory IO..which is basically the integrated MCH of the GPU core...... Any info you have on clock speeds, and voltages would be appreciated though.



Quote:
Originally Posted by mattliston View Post
soo...... couple of intel fans on the back side should help
..Might...even lowering PCB temps can reduce core temps.
post #65 of 282
hey,a few C*'s might equal to a few more %. its worth a shot if you are going for the max clock
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post #66 of 282
Thread Starter 
Some fresh meat today...the victim is pictured next to its already frankendstein'd kin *insert menacing, evil laugh here* :



Closeup of GPUv/vMEM and 3x 2ndary output caps on XFX8800GT 'AlphaDog' edition
post #67 of 282
I hear ohh's and ahh's.
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post #68 of 282
Thread Starter 
pics as we go here folks...

XFX themed 8800GT: GPUv, vmeasure for core and memory + 3x secondary caps [remote located] for GPUv output phases.



...still waiting for the caps to dry in place before they get soldered in-line.
post #69 of 282
Those relocated caps look nice! Much harder to brake off like that.
    
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post #70 of 282
Quote:
Originally Posted by CL3P20 View Post
pics as we go here folks...

XFX themed 8800GT: GPUv, vmeasure for core and memory + 3x secondary caps [remote located] for GPUv output phases.



...still waiting for the caps to dry in place before they get soldered in-line.
And I thought my card was purty beforehand
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