I'm running a Phenom II x4 @ 3.6ghz with a gtx 460 @860 core clock. Running Windows 7 and a fresh install of WoW with up to date drivers. Enabling Dx11 gives me worse performance than Dx9. I'd read about other people getting nice performance boosts so this kind of surprised me.
Dx9: http://img96.imageshack.us/img96/196...1111173309.jpg
Dx11: http://img707.imageshack.us/img707/3...1111173125.jpg
Any ideas why? I thought Dx11 was a performance boost on Dx11 compatible cards.