Gaming graphics card for hp pavilion slimline s5623w?

I need help finding a video graphics gaming card that is compatible to hp pavilion slimline s5623w.. cuz i want to upgrade my graphics card to play games like call of duty black ops and some games.. so can someone help me find a graphics card for my hp pavilion slimline s5623w.. thankyou.|||I'm sorry, but your pc will bottleneck a good graphics card. Your pc has a 220W PSU and for gaming you need at least ~350W/400W to game efficiently (as in, have good pc components). Your processor just isn't fast enough either to run games like Black Ops fluently. Your pc is built for storage/browsing and maybe games that do not require that much juice. It ain't gonna work, sorry mate.