I've been getting this issue from games that don't push the video card (Guild Wars 2, all CPU and very little GPU since its in Beta and it still isnt optimized). Finally, after reading this thread and taking some suggestions I think a couple of the workarounds
paid off.
-Changed the Power Settings to High Performance
-Changed the GPU (Nvidia 470 GTX) settings to Best Quality, instead of "Let The 3D Application Decide."
Basically, as was mentioned in this thread, the GPU was going asleep if the game didnt push it. The work around is to keep the GPU busy, even if its artificially.
Thanks to the people who found a solution and posted it here. By keeping this thread going maybe others can finally work around this frustrating error.