so recently within the past 2 weeks ive been having terrible fps problems in games where the fps would randomly drop down extremely low and then after a few minutes go back up. well now it starts at extremely low and doesn't go back up at all. for instance in places where i should be getting 100+ fps in tf2 i get 30 or less and it is extremely laggy. same thing for when i open wc3 for dota i get terrible fps and is very choppy. heres a rivatuner ss from a day or so ago : http://img26.imageshack.us/img26/9214/hardwaremonitoringn.png card is an eVGA 8800GTS and its been idling at about 68-71c and cpu temp and hdd temp seem to be fine and ive also defragged my hdd and ran multiple virus scans etc etc think its overheating and should I rma it?