Will this power supply work?

I have a HP a4327c-b Desktop, and I need to changed the power supply from 250w to anything above so I can buy a good graphics card. I would like to buy this power supply! Will it work with my computer? http://www.bestbuy.com/site/Thermaltake+-+500W+TR2+ATX+Power+Supply/9827259.p?id=1218179698118&skuId=9827259