atm ive got the very old nvadia geforce 6800 gt AGP X8

its piss poor now to play games on the pc

it runs battlefield 2 fine and dandy.but i want to upgrade it to play farcry 2

i just want a card i can plug and play.if thats possible

pc specs are

CPU Type Intel Pentium 4, 3215 MHz (16 x 201)

Audio Adapter Creative Audigy 4 (SB0610) Sound Card

ram is 2 gig corsair

TruePower Trio 650W PSU

ive lost touch with the bloke that built the pc.and ive never built a pc .but if anymore info is needed...

ive got the full everest ulimate edition software program..the things that software finds on your pc is unreal