I just finished cleaning my PC and i unpluged then pluged back in my GPU (Asus GTX760DCII OC 2Gb) i got strange performance boost that i noticed in FC4. Before it did stuter little bit on all ultra (SMAA and very high textures) now all of that is gone, it runs very smoothly. How is that possible? I didnt unplug the power cable (6pin) from the GPU i just removed it from the slot and did some cleaning on fans.