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GTX 660 Ti Core speed dropping?

post #1 of 9
Thread Starter 
When folding, the core speed often drops below the set 1280MHz down to 1202 MHz after some time, often when the WU changes. It stays at that speed until I reset the speed in PrecisionX.
It's running perfectly fine WU for WU (in most cases 8057's these days), then all of a sudden it drops the speed. This happens maybe once or twice a day.
The GPU is running at 1280MHz at 89-90% power, 1212mV and 69-70°C.

Does anyone else have this problem?
post #2 of 9
I noticed on my GTX 670 it would seem to down clock after a while, I never paid attention to if it was after a WU, or not. I thought it was related to temperature, because it would seem to down clock on me once I got past 70C. I found Kepler to be annoying, so I sold it, and went back to Fermi cards.
post #3 of 9
Thread Starter 
Hah! It just happened again! Mid-8057, 69% and back down to 1201-1202 MHz
I had to boost the clock, then immediately lower it again so it doesn't crash the WU... But it did anyway rolleyes.gifmad.gif

Do you really think it has something to do with the temperature? I can't wait to buckle up the H70 next week then...
post #4 of 9
Its possible, that's what it seemed like on my old card.

Did it down clock to around 1200mhz as you approached around 70C? Or was the temperature consistent, then just randomly down clocked?
post #5 of 9
Thread Starter 
Quote:
Originally Posted by anubis1127 View Post

Its possible, that's what it seemed like on my old card.
Did it down clock to around 1200mhz as you approached around 70C? Or was the temperature consistent, then just randomly down clocked?
its consistent on 69-70 degrees, folding for a few days now. It just down clocked randomly.

Would it help anything to set the power target lower (while folding it never exceeds 90%)? Would that decrease the boost clock? So I could increase the core clock?
Edited by Rayce185 - 12/1/12 at 9:58am
post #6 of 9
Maybe its software glitch, For instance mine says it has a boost clock of 1059 but when in game its a constant 1159MHz Using EVGA precision.


WHat I would do is watch it and see when it down clocks if it affects your PPD, if so then it not a glitch, that or GPUz I suppose.
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post #7 of 9
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post #8 of 9
Thread Starter 
I think I found out the issue. Here's an extended graph of PrecisionX:



As soon as there is a power drop (from the average 90% down to 84-85%) then the core drops it's speed as well.

I guess I'll have to decrease the power target to 95% then...?
post #9 of 9
from what i read kepler cards automatically down clock at a certain temperature. you have to adjust your fan profiles to keep the card under a certain temperature to keep the card at the boosted OC clocks whatever.

there is a guide that explains how to OC new nvidia gpu's thumb.gif
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