What RAM And OS?

i am Running With 1gb crappy ram and need more i was looking at 3-4gb

rig 2.6 ghz duel amd athlon X2 64

ATI HD4670.

RUNNING XP 32BIT

570WATT PSU

lookin to spen 40 tops

IF I Get More RAM I WILL Upgrade To X64 Vista Or XP

XP pro and cheapest DDR2 on sale.

DX10 is only available on Vista, but Vista is still a piece of garbage.

No, get Vista 64- xp pro has even worse driver support than vista, plus, vista 64 runs fine(at least on my system)Lightbulb9

Vista 64 bit and this: