Initially, I am impressed. I see dramatic performance increases at 2560x1600 in Age of Conan, even with 4x AA enabled. =)
I recommend putting a high-speed Yate Loon on the side of your case, and/or, multiple Yate Loon fans. They move a lot of air and will allow you to maintain stability.
They don't get too hot, I suppose it's due to the high-speed fan blowing directly on it.
I will post more soon.