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-   -   8800gtx overclock (http://www.nvnews.net/vbulletin/showthread.php?t=98568)

nekrosoft13 09-17-07 02:15 PM

8800gtx overclock
 
how high can 8800gtx be overlocked with normal cooler.

how high shader clocks are safe? also what is considered a safe temperature

nekrosoft13 09-17-07 02:19 PM

Re: 8800gtx overclock
 
one more question, comparing cards from the same manufacture.
one has standard clocks, second has 620mhz core, 2000mhz memory.

i know the core and memory could be of course better quality, how about the cooler? even when it looks the same, is it the same?

agentkay 09-17-07 02:57 PM

Re: 8800gtx overclock
 
Actually it really depends on the quality of the thermal paste and if it was properly applied. Mine was horribly applied and thats why I could barely get stable above 605/2000 on the stock cooler but obviously it got a lot better with the HR03+ and proper amount of AS5.

I think 620-630/2000-2020 are realistic with the stock heatsink and proper amount of AS5 on the core and a good quality silicone-based thermal paste on the ram/voltage regulators. IIRC Roadhog even managed 650 on the core with the stock heatsink but I have no idea how stable it was for him.

nekrosoft13 09-17-07 03:06 PM

Re: 8800gtx overclock
 
i wonder will the EVGA warranty be fine if i remove the heatsink and re-apply the paste

agentkay 09-17-07 03:40 PM

Re: 8800gtx overclock
 
The "color" of the paste on the core was grey but a really thick layer (2mm at least), and since AS5 is grey as well I bet they couldnīt tell a difference at all. The paste on the ram/voltage regulators was white mixed with some type of cloth, but I guess you could carefully pull that junk off and store it somewhere and put it back in case you had to do a RMA.

Save temperature seems to be the one that doesnīt cause any artifacts. I heard from guys that were running 90C at load (and stock clocks) and didnīt see any artifacts in games or benchmarks but on hot days I was getting artifacts at 70C (and 660/2050) in some benchmarks but thats with the HR03+. Iīm pretty sure my voltage is holding me back and not really the heatsink. ;)

As long as your card doesnīt cause artifacts or BSODs and goes above 90-100C, Iīm sure you are not doing any damage to it. I believe the same rule applies for the shader clock as well.

nekrosoft13 09-17-07 07:18 PM

Re: 8800gtx overclock
 
i have AS5, just need to buy something for vram

SOAD 09-19-07 11:25 AM

Re: 8800gtx overclock
 
not sure about eVGA, but warrenty is voided with BFG :thumbsdown:

Eliminator 09-19-07 10:18 PM

Re: 8800gtx overclock
 
Quote:

Originally Posted by nekrosoft13
i have AS5, just need to buy something for vram

i dont think putting AS5 will help much as the card already has some sort of silver paste on it... also i believe you wont ruin the warranty if you install a 3rd part heatsink on an EVGA card... not sure though... maybe ask jackup?

DRen72 09-20-07 07:26 AM

Re: 8800gtx overclock
 
Quote:

Originally Posted by nekrosoft13
how high can 8800gtx be overlocked with normal cooler.

how high shader clocks are safe? also what is considered a safe temperature

For some crazy reason, COD2 and FEAR would heat up my GTX to well over 90 degrees and I'd start getting random but infrequent lockups. After going to the Thermalright HR03 Plus the thing never goes over 78 degrees no matter what and I've never had a video lockup since. I also started pushing the O/C higher. I'm running it at 620/2000 all the time. I see others are doing the same.

crazycheetah 09-24-07 10:50 AM

Re: 8800gtx overclock
 
Well i have HR-03 on my gfx and i have the crazyest fan Delta - FFB 1212 EHE witch gives 200 CFM!. i have reached 702/1084 isnt it amazing... at 702/1084 the max load temp is only 56 and idles at 49.. at normal oc2 clock 626/1000 the max load temp there is 50!!! and idles temp is 42!!!!!! COOLER THAN WATER COOLING OMFG!!!!!!!!!! sorry for my english....

you know css video stress test.... this score i got with LOW oc 650/1033.
LOOK PLEASE 438.17 fps!!!!!! OMG

http://www.4shared.com/file/24916794...l_highest.html

Libertysyclone 09-24-07 12:06 PM

Re: 8800gtx overclock
 
Quote:

Originally Posted by nekrosoft13
i wonder will the EVGA warranty be fine if i remove the heatsink and re-apply the paste

Your warranty is fine. The only thing that you have to make sure of is that if there is a problem and you have to RMA it that you ship it back with the original cooler installed.

jcossin 09-24-07 06:38 PM

Re: 8800gtx overclock
 
Well I just took the step this weekend of using nibitor and nvflash to overclock at the BIOS level to 620/1000 on my Pny 8800 Gtx. I've been doing that overclock through software ever since I got the card but now that coolbits is gone, ntune sucks on Vista and RivaTuner causes Windows Defender to freak out at every boot I decided to clock the bios. I also upped my shader clock to 1450. I ran 3dmark06 and got just under 12200 so I'm happy for now and I don't have to load any more software to overclock!


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