Okay guys so my video card is a Ati Hd series 4350 pci express video card. and it was working fine for a while. but now when i play a game like crossfire, after like 5 minutes of playing in low settings. it just slows everything down and i start moving slow and shooting slow and lagging like hell. i checked my status and my ping is 40, and my fps starts in the beginning at 60. but when it happens it goes down to 5-12. and it stays around there. its instant. some one recommended me to use Furmark stress test. what do you think.