Can I just buy this one?

[FuturePCGamer]

Could I buy this pc from best buy and replaces the graphics card with an asus or visionteck hd6850?
http://www.bestbuy.com/site/HP+-+Pavilion+Desktop+/+AMD+Athlon%26%23153%3B+II+Processor+/+4GB+Memory+/+750GB+Hard+Drive/1243488.p?id=1218240379197&skuId=1243488

 

[lilcinw]

Typically OEMs come with under-powered power supplies. That card requires at least 450 watts and a six pin connector. Do some digging on HP's website before you shell out the cash.

 

[Deleted member 362816]

I have worked on quite a few hp's I would reccomend to grab a decent cheap 500 watt psu, corsair,antec,kingwin etc about 50$ or so.