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Artifacts, Temps & OC

post #1 of 15
Thread Starter 
My two 8800GTS' are running at 48c and 55c when idle in Windows (Fan at 80%). Does this seem too hot? I don't know what the load temps are at the moment.

I had them running at 765/1885/1000 for a good while, stable in all the games I played. Then today, I was playing Hell's Highway and I got a load of Green Artifacts, which only appeared occasionally and would then disappear. When they came back, I lowered the OC on the cards and they went.

I dropped them down to 700/1800/1000...

Do you think the artifacts were caused by the heat, or the OC? Keeping in mind the OC had been stable for weeks now.

Also, would I see much of a difference in FPS from the reduced clocks I have on them?

Thanks for your time!
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post #2 of 15
Quote:
Originally Posted by Kornowski View Post
My two 8800GTS' are running at 48c and 55c when idle in Windows (Fan at 80%). Does this seem too hot? I don't know what the load temps are at the moment.

I had them running at 765/1885/1000 for a good while, stable in all the games I played. Then today, I was playing Hell's Highway and I got a load of Green Artifacts, which only appeared occasionally and would then disappear. When they came back, I lowered the OC on the cards and they went.

I dropped them down to 700/1800/1000...

Do you think the artifacts were caused by the heat, or the OC? Keeping in mind the OC had been stable for weeks now.

Also, would I see much of a difference in FPS from the reduced clocks I have on them?

Thanks for your time!


You could try reinstalling drivers with driver cleaner. Just a tip. Do this in safe mode
Overclocking will cause artifacts not because of just the fact that you overclocked it is because of a rise in heat. Tell me if you experience any artifacts now with your reduced overclock. If so Your idle temperatures look pretty solid. What you can try to do is take out the gpus and dust them off. Take the front plating off and get all that grime in the metal fins in most gpus. Afterwards hit me up in a pm or on this post with your results!
    
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post #3 of 15
My two 8800GT in SLI run at between 52-55C Idle and around 66-71C at Load stable with overclocks (check what your temps are using GPUZ). Overclocking will get you extra frame rates and could get a game that is closing down on 30fps get over that hump for smooth play. With games in 60+ frame rates adding more frame rates won't make much of a difference.

1. You can get aftermarket GPU fans like the Thermaltake DuOrb

2. Use RivaTuner and create fan profiles to cool the GPUs as they increases in temp while gaming (all the way to 100% fan usage after hitting 65C).

3. Mod your case and insert a 120mm fan to exhaust the GPU heat directy out of the case. Refer to my Sig for the Mod instructions.

4. All of the above.
Edited by Gunderman456 - 12/17/08 at 5:42pm
 
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post #4 of 15
Thread Starter 
Yeah, I'll have to test some games with these settings. I shouldn't imagine the heat was too bad, 80% fan should be enough.

It may just have been the game, because the OC has been stable for a few weeks now. I guess I could always live with this OC if it comes down to it, like you mentioned Gunderman456, there won't be that much of a difference.

Thanks! + Rep!
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post #5 of 15
Temps do play a role in overclocking the shaders. The lower my load temps are, the higher i can overclock my shader before i run into artifacts. I can run anything under 1512 MHz without worrying about artifacts. But 1512 MHz artifacts at 85C, and 1566 MHz artifacts at 65C. I haven't been able to get my temps cool enough for 1620MHz to stop artifacting...if i can at all.
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post #6 of 15
Thread Starter 
Quote:
Originally Posted by ljason8eg View Post
Temps do play a role in overclocking the shaders. The lower my load temps are, the higher i can overclock my shader before i run into artifacts. I can run anything under 1512 MHz without worrying about artifacts. But 1512 MHz artifacts at 85C, and 1566 MHz artifacts at 65C. I haven't been able to get my temps cool enough for 1620MHz to stop artifacting...if i can at all.
I get what you're saying, but I don't get what it'll help me do. Should I lower a certain OC?

I was able to hit 2000Mhz on the Shader with my PNY card, but only 1885 with the XFX.

Thanks man!
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post #7 of 15
Quote:
Originally Posted by Kornowski View Post
I get what you're saying, but I don't get what it'll help me do. Should I lower a certain OC?

I was able to hit 2000Mhz on the Shader with my PNY card, but only 1885 with the XFX.

Thanks man!
Well if you've singled out the shader as the problem, try raising the fan speed or making the room cooler and see if the artifacts go away.

Of course all cards will be different. And some will just not go as high as others.
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post #8 of 15
Thread Starter 
I've not singled out the shader, I was just saying what clocks I've been able to get on it.

I'm going to test a few things today.
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post #9 of 15
Thread Starter 
I raised the clocks a little and tested and it appears to be fine, not bad temps either!

If it's stable in ATI Tool, does that generally mean it'll be stable when gaming?

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post #10 of 15
Yeah it should be fine. The best 3 games I've found for testing instability are Mass Effect, Crysis, and GRID in that order.

Mass Effect was what I used to test the shaders. I figured out the cooler i kept the card, the higher i could OC the shaders before I got artifacts.
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