Originally Posted by LydianKnight
Your case is extremely weird... unless you tried to run the game at 2560x1600 with everything maxed and those are your numbers... it's weird. Take a look at the test run I did with Borderlands, and that's with a 905e (2.5GHz) and a GTX 260 (576MHz, 216 cores)!
52 Minimal and 62 MAX (capped) with an average of 57.2 FPS
Your 5870 looks like better than a GTX 260 and you're not running a modest CPU but a superb one, so... like I said... extremely weird.
i posted above how it was fixed...it was the flash videos using enable hardware acceleration, it was causing the gpu to lock at 400/800...even if u fire up a game.
i get 62fps regardless now..just some areas it drops and i think its just more to do with the actual game having issues.