Best gpu for dc7800 SMALL FORM FACTOR

[xheraz]

hi
I have hpdc 7800 small form factor core 2 quad Q6600 2.4ghz and 2 GB ram intalled in it, along with windows 7 home edition,

I want ot upgrade my PC into a Hi tech gaming machine, plz recommend a suitable/cheap gra[phic card which can run Resident evil 5, Call Of Duty 6 Modern Warfare 2 and bettlefeild 3 etc

kindly recommend a GPU that must be cheap and efficient

 

[auntarie]

HD 6670

http://www.newegg.com/Product/Product.aspx?Item=N82E16814102958

 

[RiverOfSparta]

It says that card requires a 400 watt psu. The dc7800 sff has a 240 psu. Don't listen to his advice.