I installed the card in today but now I have stuttering issues. Before I had a 6800 GS, and it ran great. But now with the GTS things get "laggy", say like when I listen to music in wmp, it will stutter. When I play games it will stutter. I installed nvidia's new driver and ntune but that didn't work. Can anybody help? Thanks in advance. My PC specs. AMD 3800 X2 (939 lol) 2 gigs of DDR an ASUS A8N SLI motherboard 450 power supply.