I'm having a very weird issue with my system and I have no idea what the cause could be. Problem is that my fps drop regularly (and this seems to go hand in hand with hdd access) to 1fps-ish, although it works fine when it's not dropping that low. My system: Ati 4870 (9.2 drivers/ Vista Ultimae) E6600 @ 3ghz (also same at default speeds) 2x2gb OCZ ram Asus P5B-E motherboard 3 harddrive CORSAIR HX Series 520W It SEEMS (not sure) that I mostly get these drastic drops in performance when accessing the drive. All drives have been defragged and I also tried with different OS on different boot drives. I'm really at a loss here. Anyone got any idea what might be causing this?