Put in mind though, Crysis isn't out yet, so there is no way you can know if what is enough to run it smoothly. From I see though, I'm guessing it should run good. I would get a Core 2 Duo system though, since you can overclock it greatly and should give you better performance. (E6600 should be around X2 6000 price by April 22)
on the inside i want to go intel.but its weird.I'm an ati and amd person.you guys know how it is right.
do i need an sli power supply if i'm going to use the 5.25 bay one.which in theory should do the job.
oh yeah.I've been fearing that parts won't be compatible with vista should i fear this.
I'd use two 8800GTXs as a reference for the amount of power needed for 2900XTs in Crossfire.