I have windows 7 32 bit and 4 gigs of ram, but i will soon upgrade to windows 7 64bit and 6gb if ram, now i have 8gb but i dont have any more slots lol. So will i see some performance difference in having 2 more gb of ram and 64 bit OS?
yes, you will see some extra performance. in my opinion, 6 gigs is the perfect amount, as 4 gigs is sometimes stretched, and 8 is overkill. probably 3-10% increase in fps.
I would not expect to see any substantial gains. There may be some technical differences, but overall I wouldn't expect to see anything huge unless you tend to multitask quite a bit.