yep socket 939 will be more than enough for you.

Its what my pc has got(Athlon 64 x2 4200), you got your 4 ram slots, pci-express slots, and normal ones for sound card, modem or whatever.

Mines fast as fck though(above processor with 2gigs of ram) im flying

Xr4 what graphics card you got then? because i know you play battlefield on it and 2142 is a very demanding game graphically unless of course your playing it with half arsed graphics/frame rates