I have recently reformed my PC, now, my video card is a Radeon HD6870, the processor is an Atlhon x4 640 (3GHz), and 4GB of DDR3 RAM. I haven't been having any issues when playing most of the games, but when i started Crysis, the game just runs very bad, even in the lowest configurations, the game has frequent slowdows, and it has already crashed my OS twice (had to reboot) I've already updated my video card drivers but the problem still persists! Is it a processor or RAM problem? (my motherboard is a ASUS m4a88t-v evo Thanks!!!