how much is his budget?
Telling budget is useless cos we live in a different country.
But he got enough budget for HD5770 and VX550W.
If your friend can Overclock that CPU(Its a very good chip for OC) then tell him to get a HD5770http://www.newegg.com/Product/Product.aspx?Item=N82E16814102858
Otherwise tell him to get a HD4850 for $95(This is a very good card for awesome price).http://www.newegg.com/Product/Product.aspx?Item=N82E16814102824&cm_re=HD_4850-_-14-102-824-_-Product
A 450VX will run all these cards without a sweat.
450VX isn't too low for these cards.
Go for it wit your eyes closed.
Nope,he is unable to overclock.
He is worried about CPU,if that will be a bottleneck.
If prices are same then which is better HD4850 or GTS250 ?
HD5750 and HD5770 are costly compared to above cards.
Price as follows: