You should be fine with 2gigs of memory. I run the game with a fairly high resolution, and fairly high graphics with only 1gig, and my X1650pro. The key is to turn off all background applications that aren't needed so you could free up memory. Also, be sure your rig is in top notch shape, meaning defrag regularly and use an application such as Ccleaner to keep your HD in order. Works for me
