Need help picking graphics card!

i want to play games like call of duty, AVA, and combat arms pretty smoothly but also anything under $100 plz thx

here are my specs:
Manufacturer:
HP-Pavilion
Processor:
Pentium(R) Dual-Core CPU E5200 @ 2.50GHz (2 CPUs), ~2.5GHz
Memory:
4 GB RAM
Hard Drive:
304 GB
Video Card:
Intel(R) G33/G31 Express Chipset Family
Operating System:
Windows Vista™ Home Premium (6.0, Build 6002) Service Pack 2 (6002.lh_sp2rtm.090410-1830)

That would have been a good choice a few years ago, sadly, nowadays something like the older ATI 5670 rapes that thing

suggestions?

i suggest something like nivida 9800 so much graphics and moves smooth

As said, for <100 the ATI 5670

Get out if you have amnesia. The 9800 has even gotten multiple refreshes /fp

i have no clue what that means O_O but yea i still need a graphics card