Want to buy a new graphic card pls suggest

[intrinsic]

I own a compaq presario cq3210IX bizsupport1.austin.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=120&prodSeriesId=4075997&prodTypeId=12454&objectID=c02063033 dis is the detail about my pc n m also upgrading my cpu to AMD Phenom II X4 840.. I want to have a graphic card more den 1gb want it for gaming plz recommend

 

[mfarrukh]

Radeon 6670/5670 will do