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GTX 480 throttling down to half speed

post #1 of 8
Thread Starter 
Anyone have any experience with this? I'm running the latest driver's 275.33 and have been since I got the card last week. It has been running fine up to today when I noticed the core clock will only go to 400mhz as opposed to 800mhz.

Any idea's? I have tried restarting the computer, that didn't work.
post #2 of 8
If that happens under load usually means the clocks are unstable. If you are overclocked then put it back to stock or you can try more volts in afterburner.
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Frank
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post #3 of 8
Quote:
Originally Posted by eggs2see;13831410 
Anyone have any experience with this? I'm running the latest driver's 275.33 and have been since I got the card last week. It has been running fine up to today when I noticed the core clock will only go to 400mhz as opposed to 800mhz.

Any idea's? I have tried restarting the computer, that didn't work.

Well since 270 drivers and later that happens if your card is unstable (OC)..

Driver crashes and when it recovers then GPU is stuck to 2D clocks = 405Mhz..

Test your card's stability with 30 loops of Crysis bench (or Warhead/Crysis 2)..

If it fails then upp GPU voltage and test again or lower the clocks..

Also you can use 20 minutes of 3Dmark 11 loop or Ungine Heaven benchmark loop..


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post #4 of 8
Thread Starter 
Thanks guys! found a post on EVGA boards about the same thing, and confirms what you have both said. Will give the card a few more volts.
post #5 of 8
Along w/downclocking due to instability, in the converse, having your card fail to upclock to full 3d can also be caused by a *lack* of load ... in which case, it's actually quite normal, and typically desirable.

So ... What game(s) have the issue, and what settings are you playing it/them at? Are you seeing the issue when playing the same game(s) as before, or is it a new game you're seeing the problem in?

Also, are you using v-sync, or does the game(s) w/the problem have a framerate cap?
Edited by brettjv - 6/11/11 at 1:15am
    
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post #6 of 8
Thread Starter 
Quote:
Originally Posted by brettjv;13831653 
Along w/downclocking due to instability, in the converse, having your card fail to upclock to full 3d can also be caused by a *lack* of load ... in which case, it's actually quite normal, and typically desirable.

So ... What game(s) have the issue, and what settings are you playing it/them at? Are you seeing the issue when playing the same game(s) as before, or is it a new game you're seeing the problem in?

Also, are you using v-sync, or does the game(s) w/the problem have a framerate cap?

Hmm.. good questions, i'll keep an eye on it actually. I play a number of games, I honestly can't at the moment pinpoint if it's any single game or what it was that caused it. I first noticed it when I was folding. I noticed my PPD was half what it usually was, but I can't guarantee that is when it happened as the game I play most CS:S would probably run just as well with my card clocked at 400mhz as I use a frame rate cap of 180 on that game.
post #7 of 8
i have this happen with my SLI setup all the time...

it is normally... have a look at your GPU usage...

you will see it below 50% when it drops down the GPU clock...

it will ramp back up if needed
post #8 of 8
Thread Starter 
Ok so I think I have found the root of the problem. Heaven benchmark.

After I increased voltages, the card appeared completely stable. I ran 20 passes of crysis benchmark, I played some TW2, BC2 and ran 40mins of OCCT and some CS:S. No problems with the card. I run one pass of heaven, check my clocks and it's down to 405mhz.
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