Playing stressful games will have frame drops, stutter & freezing which in the end results in having lower performance. I installed the drivers and after 4-5 hours of BF3 it began to stutter and frames dropped to 30-40 fps which was fixed by going back to the earlier drivers. What I noticed was that my games didn't feel smooth anymore, frames dropped by 6 FPS in heaven benchmark. I got another 780 to see if the problem persisted with the 320.49 drivers, no, everything was smooth and frames was higher than my old 780.. Thinking perhaps I got an unstable card I tried the 326.80 drivers and over time my game began stuttering and frames dropped considerable.. I ended up RMA'ing both cards and wont ever touch a Nvidia driver without reading about their issues, not to talk about the card killer 320.18 driver that fried thousand of cards. 326.80 produces overheating, stuttering, frame drops, crashes, glitches, BSOD, not to talk about the Splinter Cell & Metro Last Light still not working properly on 780 cards.