Umm first of all, they're all the same chipset, 7800gtx. The question you're asking is really which brand is the best, well the answer is the <A HREF="http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1497498&Sku=P450-7803" target="_new">XFX</A> overclocked card, stock at 490+40mhz, rather than Nvidia's refrence which is at 430+40mhz, and memory is defaulted on the card at 1300mhz, instead of Nvidia refrence of 1200mhz.