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My core clock is throttling and I can't figure out why. Suggestions?

post #1 of 3
Thread Starter 
I have a 780 Ti Classified and I usually run it at 1346Mhz core in games with 1.375v and 400khz PWM. When doing stability testing in Valley/Heaven, the clock always stayed pinned at 1346Mhz and never throttled, and in games like Crysis 3 and Thief I never noticed any throttling (although I wasn't watching the clock speed very closely while playing because I was more focused on the game). Today I was playing some Far Cry 3 and noticed the clock would start at 1346Mhz and stay there for the first few minutes of the game running, and then it would start throttling in more graphically demanding areas like detailed villages. It would throttle all the way down to the 1019 base clock and bounce around at random values between 1000Mhz and 1300Mhz until I either looked up at the sky or went to a less demanding area with a lighter rendering load, at which point the clock would return to 1346Mhz. It's frustrating because the clock is dropping by over 300Mhz in the areas where I need the power the most, resulting in dips below 60 fps.

Temps never exceed 45C (water cooling) so I know it's not temperature throttling. I'm using the FTW2002 bios with the power target set to the maximum 115%, which is supposedly a 690w limit on this BIOS. Temp target is 95C and it doesn't matter which one I prioritize, I still get the same throttling. Monitoring the Power % usage graph, it never gets anywhere close to 100%. I do not have v-sync on or any type of frame rate limiter. Running in full-screen mode. I tried BF4 afterwards and it was a steady 1346Mhz clock the whole time.

Could I possibly be running into a hardware TDP limit, or is this more of a Far Cry 3 + drivers problem? Using the latest 337.50 drivers btw, not sure if the same problem occurred with the previous driver because I didn't try FC3 on those drivers.
post #2 of 3
Thread Starter 
bump
post #3 of 3
My only suggestion would be that in certain games there are cap limits at 99fps, and if your card exceeds this it will throttle down. Assuming you have V-sync on in some games, you can still expect some dips below 60 such as 55 or 57fps especially in sudden intense scenes where the card simply fails to quickly respond to it and dump more juice into it to perform better.

Another thing, it depends on the game! BF4 is the most well optimised game using CPU and GPU, in other games such as Arma 3 for example, my GTX 780 boosts to 1215 normally, yet it runs at 954Mhz.

I'd say your card is perfectly fine..
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