When I had to install World of Warcraft, it shows 30% speedup in World of Warcraft. I am using a GeForce gtx 580 with latest drivers. This happened when I run World of Warcraft in DX11 mode. I am Using a GTx 580 with latest drivers. DX11 card owners should enable DX11 support as it makes World of Warcraft faster. DX11 mode is actually making the graphics cards work and the game is becoming less CPU dependent and that is why 30% gains are noticed.