So I've got 2 Gainward 780's in SLI and in some games I get massive FPS drops (so far its LoL and Bf3). The FPS will be sitting at whatever e.g. 100 fps then drop suddenly to 1-20 FPS and then come back up again. In Bf3 it isn't as bad, but in league of legends my entire screen freezes. I've tried it with SLI on and off, doesn't fix it. Overclocking doesn't seem to be the issue as I've had it at default clock and it still happens. Driver : 320.49 System specs are as is my profile. It happens every game. It isn't isolated incidents.