Ok i recently got a 9800 pro and before that I was running a geforce 5500. Ever since i installed the ati card my system seems to lag on everything. Ive tried newest driver and am currently running a older driver but , same problem. So I thought maybe it my psu because it's a cheapo one. So I hook another one up just dedicated to the graphics card and same thing. My question is do you guys think I have to reformat to fix the problem? Oh yea by the way before I installed the ati driver I did run driver cleaner and all that good stuff.