Best gpu on a 300W psu

[hhahaahyea]

an older computer my friend has has a 300W power supply in it. he'd rather not upgrade his power supply. what's the best pci-e card he could get that'd run on a 300W psu?

he'd like to play cod4 at relatively high settings, and i told him to get a new psu. if he had to, what psu/gpu combo would be cheap and perform well?

 

[jennyh]

if he doesn't, a 4670.

if he does and wants really good cheap, a 4770 + some reasonable 400w psu.

 

[hunter315]

How old of an older computer are we talking? power supplies arent as efficient as they get older so he may need to upgrade just to get upto a 4670. Whats the rest of the system look like because if its got a power hungry processor he might be pushing it. If he is willing to do a PSU upgrade corsair has a 450 cheap right now.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139003