I have a Dual core 1.6ghz processor with 2Gbs or ram (I think it's DDR2)
Ive run a lot of computer tune-up and registery cleaners though so I can defragment hy hard drive in 1-6 minutes (last time was 3.7) and cleaning my registry takes about the same time
I could get but it requires you to (every time you start up your computer) be connected to the internet to "Authenticate" the game so you can play the single player missons, this would be annoying as hell if i was at a place without net for a while and wanted to play it on my laptop