Alright so I've been using 2 EVGA 9800GTX+'s for the past couple months in SLI mode and they've been working perfectly until a week ago when my FPS in my games started to decrease dramatically. COD4 went down from 150 to 33 fps and L4d went down to 30. I reinstalled the display drivers countless times, cleaned the display driver registry, made sure the cards are connected correctly, switched the SLI bridge, set up SLI correctly and reinstalled the games with the latest patches. I don't know what else to do besides maybe buying the next step up in the 200 series. I emailed NVIDIA for help and that didn't work at all. My system is Vista ultimate 64, 8GB RAM, Intel Core 2 Quad Core 3.15 OC, EVGA 780i FTW motherboard, 750W power supply. My case has excellent cooling (Coolermaster HAF). Any help would be awesome, and none of the cards are OC.