I've got a GTX470 with the latest drivers (285.62), and whenever I try to play a video while GPU folding it ALWAYS lags. It didn't use to be this way with the older drivers (275.33, 260.xx), but lately the drivers seem to be causing problems with GPU folding.
I play videos with Media Player Classic Home Cinema, and no matter what I choose - hardware decoding or software decoder, EVR or Overlay or VMR9 or madVR, it causes the entire system to feel laggy. As long as MPC is on with the video, everything lags - the GUI, other programs, even the mouse cursor sometimes. I click on the video to pause, and the frames just keep coming! This happens no matter the resolution of the video. This doesn't happen while playing Youtube videos without having MPC playing a video.
Anybody have experience fixing this? Or are drivers supposed to break GPU folding every now and then?
EDIT: just downgraded to 275.33, the video itself doesn't lag now, but everything else still does to a lesser degree. UAC dialogs (the ones that darken your screen and ask you for a yes/no) are still very laggy. I thought drivers were supposed to fix stuff.
Mothership: Thuban 1055T@3.7GHz, 12GB DDR3, M5A99X EVO, GTX470+Icy Vision Rev.2@840/3800, Vertex 2E 60GB
Supply ship: Sargas@2.8GHz, 12GB DDR3, M4A88TD-V EVO/USB3
Corsair: Macbook Air Ivy Bridge