I'm not sure but I do feel bad for everyone who went out and got some $500 Intel CPU and sli 1GB video cards JUST for this game which seems to be running fine on my secondary machine (Core 2 Duo @ 3.4/3GB DDR2/9800 GT 512MB - the system I upgraded from)
In other words, to answer your question yugimon, get a mid-range AMD system that will run Skyrim and Crysis 2 at full settings, and save your money for another upgrade later. You'll have two systems for basically the same price that you'll spend building ONE super-quality system now
It's like the argument I had with this Ford dealer. He was convinced that I should get a brand new Mustang GT, but it's simply not cost effective when you can get a 2006 for a third of the money, and just wait a few years for the 2011 model to come down. Phenom II chips were an arm and a leg last year, now you can get them for next to nothing - and they will run ANYTHING.