I’m running an NVidia GTX680 on Windows 7 64-bit at 2560x1440 at maximum settings. When I first start playing I am getting a consistent frame rate of 59 to 60. After some length of time 30-60 minutes… the screen will go black for about 10 seconds and then when the picture returns I am getting a frame rate of 8 or 9. I can bump my rate by dropping the graphics settings to “laptop standard” for around 30fps, but obviously I would prefer not to do this. If I log out and get back in, back to max settings and 60fps.

Anyone else run into this? I am updating my NVidia drivers later today, but not sure if that will fix the issue. Just throwing this out in case someone else has already solved it.

Many thanks!