Hello, this is my system e6600 asus P5B Deluxe Corsair XMS2 DDR-800 Thermaltake w0057 500watt modular PSU 2 sapphire x1650xt's First off I had to jump through hoops to get ccc to let me enable crossfire, once I finally got it enabled, problem after problem is being shot at me. Oblivion runs at 25fps with 1 card, with crossfire enabled? 3fps... thats right 3! and chops all over the place. Supreme commander demo now says I dont meet the minimum system requirements. Call of duty 2 crashes before it even gets started. Prey and quake 4 however I have actually seen nice improvements with them. FEAR doesnt even render hardly anything, I see some gunshots but mostly the screen is black. So what in the world is going on? I have uninstalled ccc crazy amount of times, reinstalled DX, flashed bios. The only thing I am uncertain of is the bios settings to allow the 2nd pciex to be active? I figured if I didnt have it right, it wouldnt even detect the 2nd in windows or allow x-fire to be turned on. or is my power supply causing this much chaos? Thanks!