8800GT Overclocking Thread (Official?)

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11-09-2007, 10:24 AM
GAR

i wish they put in better ram, i would pay 50 bucks extra for better memory....this GAYmonda sucks.
11-09-2007, 10:37 AM
giorgos th.

Yeah.....in the other hand its a mid-range 230E card...
11-09-2007, 02:29 PM
yonton228

These cards look so tempting considering I am still using a 7900GT LOL.

-yonton228/timmy
11-09-2007, 03:02 PM
ziddey

yo I agree too. I'm on a 7900gs on steroids and it's way more than I need as it is. Really would like to upgrade but only playing cs and cs:s, there's just no need. 700/800/60 on a 7900gs and it still kicks hard :)
11-10-2007, 11:11 AM
heikis

why is it that the shader clock above 1700MHz results in a freeze during 3dmark05? my GPU and MEM clocks were ok. for example 700/1750/1800 is not 3dmark05-stable.
11-10-2007, 11:50 AM
Decami

I am at 700/1750/1000(2000) right now. I could easily go further but the fan right now is at 70% duty cycle, anything over that is too loud to bear with and I like to keep temps under 85.
11-10-2007, 03:56 PM
skullfcuk

Has anyone tried one of these cards with an aftermarket cooler on it yet?
11-10-2007, 05:03 PM
ziddey

yeah it keeps reallllll cool. people run with mcw60's and get the same temps i get with my 7900. real beneficial to overclocking a lot more.

i haven't seen anyone voltmod yet but i bet it'd take to it extreeeemely well especially given the low temps with water cooling
11-10-2007, 08:05 PM
Sentential

Quote:

Originally Posted by skullfcuk

Has anyone tried one of these cards with an aftermarket cooler on it yet?

Im using a Zalman VF900 on it right now, its not a whole lot better than the stock cooler on idle but a hell of alot better on load:

~~Stock Fan @ 90%~~
Idle: 52c*
Load: 73c*

~~VF900 Default~~
Idle: 44c*
Load: 59c*
11-11-2007, 01:13 AM
yenclas

Hello, I'm Spanish, sorry by my bad English.

I recently bought a XFX GeForce 8800 GT normal, with a Zalman VF1000. With Zalman and without it when I overclock up to 950MHz (memory) in Pro evolution soccer 2008 when I am playing a bit, I get strange red fog and the systems stop. Temps never ups 55ºC.

I can do 710/1775/1900 and its not a bad overclock but I think I have a problem with memory overlock above 1900

It's strange that in other games like Crysis, this issue not exist for example in memory at 1950.

Can you help me ?
11-11-2007, 04:57 AM
heikis

Quote:

Originally Posted by yenclas

Hello, I'm Spanish, sorry by my bad English.

I recently bought a XFX GeForce 8800 GT normal, with a Zalman VF1000. With Zalman and without it when I overclock up to 950MHz (memory) in Pro evolution soccer 2008 when I am playing a bit, I get strange red fog and the systems stop. Temps never ups 55ºC.

I can do 710/1775/1900 and its not a bad overclock but I think I have a problem with memory overlock above 1900

It's strange that in other games like Crysis, this issue not exist for example in memory at 1950.

Can you help me ?

what drivers are you using? 169.04 should be the current best
11-11-2007, 07:34 AM
yenclas

Quote:

Originally Posted by heikis

what drivers are you using? 169.04 should be the current best

Hello,

I'm using 169.04.

Thanks
11-11-2007, 11:17 AM
Hicksetto

Hi,

Gigabyte 8800GT OC Results:

756/1836/2100 fully stable (couple of hours: TDU, COD4, Crysis Demo, MoH Airborne) max. 67 degrees on load with ZALMAN Fatal1ty FC-ZV9 VGA Cooler and BIOS moded to 1.1v. with nibitor.

Thanks,

Hicksetto
11-11-2007, 01:33 PM
Mysterfix

Card Maker: eVGA
Core speed: 880
Memory Speed: 950
Shader Clock: 2214

Cooling:MCW60 & ramsinks, Idles at room temp, Load 40ºc
11-11-2007, 01:46 PM
giorgos th.

Vgpu?
11-11-2007, 06:35 PM
Mysterfix

1.3v vgpu

http://img204.imageshack.us/img204/2...tbench2on2.png
By mysterfix
11-11-2007, 10:52 PM
shaolin95

Can you run the GPU test from Crysis at 725/1757/975 and then at your top OC speed. I want to see what kind of difference this is making....impressive speeds btw.
11-12-2007, 02:50 PM
Matkun

Stock eVGA vanilla version, though stock clocks were 650/1625/950 for some reason.

ATITool stable at 738/1728/972 so far.. if I raise Shader up one more step, it jumps up to 1782 and has huge yellow artifacts in ATITool, even though ATITool doesn't actually detect them. Same with Core, if I bump it up to 740, I see ocassionally a tiny yellow dot appear, but ATITool again does not detect them as artifacts.

Temp maxes out at ~91 degrees celsius, with Fan again at stock speeds and not noticeable over my system's normal noise (in a P182 case). Nice and quiet compared to my previous 2900 Pro.

Not bad overall considering I paid $199 CAD due to Future Shop's price error.
11-13-2007, 03:05 AM
giorgos th.

your fan is working at 29%.....increase the speed a bit cause 91C are too much....and possibly your core will go higher with better temps..
11-13-2007, 06:45 AM
f4lcon

Any of you guys heard something that nVidia might recall 8800GT-s due some mysterious (yet unrevieled, maybe heat-) issues?
Asus and Leadtek might admitted it unofficially to distributors.
Any info will be appreciated.
11-13-2007, 08:55 AM
Matkun

Quote:

Originally Posted by giorgos th.

your fan is working at 29%.....increase the speed a bit cause 91C are too much....and possibly your core will go higher with better temps..

I increased the automatic cycle a bit in RivaTuner, it cuts in more aggressively lowering it down to 85C, though it's starting to get audible at that point.

I think I'd rather have sacrifice the 1-2% more FPS I might squeeze out of the overclock for not hearing the whine of the fan.

BTW, tested Crysis GPU Bench at stock 650/1625/950:
Avg. FPS: 35

OCed at 738/1728/972:
Avg. FPS: 38

This is at 1280x1024, High settings for everything, no AA/AF. So about an ~8% improvement from a 13% Core OC and a 6% Shader OC. I think I might just leave ram at stock to maximize timings.
11-13-2007, 09:08 AM
skullfcuk

That 877/1000/2214 clock is incredible!! Is that a hardwired volt-mod or a BIOS tweak?? My car will arrive tommorrow, so im keen to find out how to maximise any unockable potential it may have.
11-13-2007, 12:56 PM
shaolin95

Quote:

Originally Posted by Matkun

I increased the automatic cycle a bit in RivaTuner, it cuts in more aggressively lowering it down to 85C, though it's starting to get audible at that point.

I think I'd rather have sacrifice the 1-2% more FPS I might squeeze out of the overclock for not hearing the whine of the fan.

BTW, tested Crysis GPU Bench at stock 650/1625/950:
Avg. FPS: 35

OCed at 738/1728/972:
Avg. FPS: 38

This is at 1280x1024, High settings for everything, no AA/AF. So about an ~8% improvement from a 13% Core OC and a 6% Shader OC. I think I might just leave ram at stock to maximize timings.

Are you running XP or vista? I run at the same resolution but using Very High for everything except shadows and Post (both at High) and I get the same almpst 39fps.
My speeds are close to your at 725/1757/975
11-13-2007, 02:01 PM
Matkun

Quote:

Originally Posted by shaolin95

Are you running XP or vista? I run at the same resolution but using Very High for everything except shadows and Post (both at High) and I get the same almpst 39fps.
My speeds are close to your at 725/1757/975

Vista. My system is pretty much same as yours except I run my Opteron 165 at 2.7 Ghz. I'm guessing your on XP?
11-13-2007, 02:44 PM
shaolin95

Yes I am running XP.

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