Well I found this a interesting question so I just tried it here. It has been a LONG time since I ran SR2.
Checked SR3 first. It seems to be using 4 cores here (Intel i7 on win 7 64 bit).
So then I fired up SR2.
Well, at the moment I can't get it to 'continue' the old game. It errors out on me with crash. However according to what I can see
in the graph on resource monitor it APPEARS to be trying to use 4 cores of the i7 just as SR3 is.
Okay, I just tried again. I could not load a old save game. Made a new game and got past character creation. According to
the monitor it is mostly using 2 cores with a bit of spillover on the other 2. Mostly on 2 cores it seems. Without havin access to real numbers,
it appears twice the load about more or less on 2 cores than on the other 2.
I don't know if that is the right way to judge this or not, just using the graphical display in the Windows 7 resource monitor.
Damn, gotta say, SR2 sure had some interesting character creation bits they dropped from SR3.
Can't wait for the new SDK we should get for SR3 maybe some of that bling SR2 had will make it to SR3!
(I see I only have six hours played in SR2, haha) See I discovered SR via SR3 so I'm ...... sick like that.