There actually is a difference in hardware, not the gpu itself but the cards they are on. Some have custom pcbs, better vrm, caps, chokes, etc. As the others have said the asus directcu or msi twin frozr are the top ones. But you also can't count out evga for their lifetime warranty and sometimes found at a lower price if it's the reference design/cooler. Unless you want to run really cool and oc, the lowest price should be fine. Just make sure it's the ti version and not the non ti.