What, exactly, do additional BIOS on the card do for you (or performance)? From what I see, the 980SC is very slightly slower than the classified specs, but the classifieds have the triple BIOS; given that they are always in heavy demand, I assume the performance blows away most of the other cards.
E: what I gather is that multiple BIOS allow for multiple settings for OC purposes. Other than that, is there any benefit to getting the classified over the 980SC?