Upgrading my HP Pavilion p6787c graphics card

[Sausywaffles]

Hello,im going to upgrade my video card on my HP Pavilion p6787c and im going to use it for gaming so if any of you guys could tell me a descent card over a 1gb and a descent price i would be thankful.

 

[te100]

You will need to upgrade PSU The specs say you only have a 250w you will need at least a 400w