"nVidia wasn’t kidding when they said that their 7800GTX card will be available from most of the leading manufacturers at launch. We’ve already received samples from Gigabyte, MSI, Leadtek and Albatron, however, the Albatron card had to be returned before we could evaluate it so we didn’t get a chance to test that one out. The remaining three cards are IDENTICAL to the reference card that nVidia sent us- take a look at this picure of the back of the card and tell us if you can tell if that's a reference card or one by MSI, Gigabyte or Leadtek."
Great article by t-break,
read it here.