main ne ye games chalini hain

1) NFS most wanted 2
2) NFS RUN
3) SHIFT 2 UNLEASHED
4) CALL OF DUTY BLAK OPS 2
5) FARCRY 3

is k liye nvdiai ka kon sa card lagye ga kiya 512MB pe chali gi ya 1GB card leyna ho ga

mera pc

WINDOWS 8 PRO
CORE 2 DUO CPU 3.00GHZ (Dell Optiplex 760 )
RAM : 2GB