Until recently, I was still running Windows XP (x86, MCE) and would get 50-60 FPS on WoW (Ultra with Low Shadows, 90-120 on Low). Now, after a reformat and an OS update, I'm running 15-20 FPS (25-30 on Low). I jump up maybe 5-10 FPS if I enable DX11 rather than DX9, but WoW crashes on me within 30 seconds of getting in-game. Comp specs: Windows 7 x64 Ultimate Asus P8P67 (Rev. P67 B3) Motherboard Intel core i5 2500k @ 3.3GHz 4 GB Corsair RAM @ 1600 MHz Galaxy nVidia 9500 GT (OC to 800 Core/1700 Shader/400 Mem) with 275.33 drivers Apevia Warlock 750W Power Supply (I'll be honest; I've never heard of the brand, but the PSU itself has never given me issues) Does my GPU just have compatibility issues with Win7 so much that I cut my FPS in half by switching from XP to Win7? Nothing else changed about my computer when I upgraded. Also, I do have an msi nVidia 560 GTX Fermi on the way, but I would like to get this GPU's issue fixed regardless.