Microstutter ( Evga Precision )

[Neil79]

http://www.evga.com/forums/tm.aspx?high=&m=384534&mpage=1#385033

Problem:

evga precision 1.9.1 works (1.9.4 doesnt) but has a problem with BFBC2 -causes a frame skip directly proportional to the interval polling rate set in evga precision.

Microstutter in L4D and TrackMania WHEN EVGA PRECISION is running and monitoring. Hardware polling every second = big stuttering, polling every 15secs = good play...so I'll see if it's fps or freq/temp causing this. Got data displayed to G15 LCD and onscreen. Fraps and RivaTuner might do the same, don't have them installed.

Thread makes for interesting reading!

 

[Neil79]

More news on stuttering on GTX 200 series:

I've just returned to home and installed old goog GTX 275 in one of my home PCs to analyze the issue and profile the bottleneck. The sensor giving stuttering on GTX 200 series is fan speed sensor, it is now eating about 20ms instead of approximately 5ms before. Which makes monitoring more than two fan speeds at once via NVIDIA API on GTX 200 series with 257.17 driver close to unusable because it eats up to 50ms total (which means approximately 5 frames loss if framerate is 100fps (and 1 frame time is 10ms) for example, this is a noticable delay causing stuttering effect).

So the verdict is: fan speed reporting API in NVIDIA release 256 drivers is currenlty working abnormally slow on GTX 200 cards. It is strongly recommended to disable fan speed graph in both Precision and Afterburner if you're experiencing stuttering. And details are passed to NV so I hope that fan speed reading routines will be optimized back to release 195 state soon.

UPDATE from guru3d