I wouldn't get the 512 kit (2x256) if I were you. I'd get either one stick of 512, one stick of 1 GB, or two sticks of 512. Why not? There is some good GEIL ram out there that is pretty cheap right now. I found some GEIL value RAM that will follow an overclock of the FSB all the way up to 255 MHz for a total of 510 MHz. That is pretty darn good for only $90 for a gig stick... but I think it is a sale or something, because just a week or so ago it was like $190? I don't know... at least check into stuff like that.