These are what I'm going to buy to make my HP Pavillion a1640n a gaming computer.
Video Card
http://www.buy.com/retail/product.a...m=203444495&Type=PE&Category=Comp&dcaid=15890
Power Supply
http://www.buy.com/retail/product.asp?sku=203270716&loc=101
ATX Case
http://common.ziffdavisinternet.com/util_get_image/14/0,,i=148460&sz=1,00.jpg
Video Card
http://www.buy.com/retail/product.a...m=203444495&Type=PE&Category=Comp&dcaid=15890
Power Supply
http://www.buy.com/retail/product.asp?sku=203270716&loc=101
ATX Case
http://common.ziffdavisinternet.com/util_get_image/14/0,,i=148460&sz=1,00.jpg