So, I bought 2 eVGA GTX 580 Superclocked (015-P3-1582) cards, 1 from Newegg, 1 from Micro Center. Recently I upgraded to a GTX 690 and sold both 580s over eBay. One recipient gave me the all clear, everything as expected, etc... The OTHER guy, is claiming he received the regular, not superclocked version (015-P3-1580), that the DVI bracket is different from the superclocked version (?) and that there is a 01-P3-1580 sticker on the back of the card. I checked as many sources as I can find, and I've never seen a different DVI bracket and as far as I can tell the two versions are just about identical, externally. Unfortunately, I didn't think to take a picture of the BACK of the card, the only concrete evidence I've been able to find that I actually owned TWO Superclocked cards is the receipts for both cards, and benchmarks I submitted from 3DMark 11 which show the clock speeds as being at Superclocked levels for 2 GTX 580s (SLI automatically uses the clock speeds of the slower card). The guy who's saying the card he got isn't the one he ordered has 3 positive feedbacks, the oldest of which is June 13, 2012, even though he's been an ebay member since 2010. Since he says he just wants to return it and get a refund, my current thinking is that he's trying to take the Superclocked version I sent him and send me back either a standard card...more likely, a non-functional standard card. Hoping to get advice from Tom's members, and thanks for your help in advance!