I have to say i'm quite disappointed in the wow performance, I was recomended about half high half good. I can run it on high at 1920 x 1080 with 45min fps mostly 60 though.
I was kind of expecting ultra
My build is
i5 760 at 3.0ghz
8gb ddr3 1600mhz
750w modular thx PS
asus p7p55d-e pro mobo
People always underestimate what WoW demands.
However, you should be able to use mostly Ultra settings, you just have to turn down the shadows a notch or 2. That's what really hurts the performance. But don't expect more than low to mid 30's in Dalaran.