Read my second post....from a governed 91fps to randomly dropping to 26fps in COD4 (CALL OF DUTY MODERN WAREFARE)
This is kinda a recent development.
It started happening with my GTX480 so I got a GTX580 to replace it because I thought maybe the 480 was going to diE.
Unfortunately the fps drops with the gtx580 too.
26fps in COD4 is pathetic for a GTX480 and GTX580.
These cards should slaughter the game.