ok, you're dragging your heels and wondering if you can drag them just a little bit more?
yes, you can run it single core.
but you need to make sure you vid card has some umph left in it, even for low settings.
my test system..
AMD Athlon XP 2800 M
2 gig ram
Radeon HD 4650 1 Gig Video Ram
that's a state of the art system (for 2003, cough) and it will run it. Now will it run it on high settings looking awesome? No. But can you limp along until you put a crowbar in your wallet and pony up some cash once you're sure you like the game? Yes.
Frame rates hover around 40s - 50s in space and a little lower on the ground / bridge. So it's playable but you'll be thinking the whole time. 'gee, i think it's time.'
but fear not. you CAN run it. despite what that site by that name might tell you, you just wont RUN it very well, playable, but just barely.