This card is pretty long! It even has one of those PCI card guides to keep the card in place.
Both cores’ frequency are 777MHz, the same as HD 3870’s. And R680 is using 1GB GDDR3 memory. Source indicate that the retail version’s frequency is still unidentified.
We guess the two big fin sets are still using HD 3870’s old one. So it is a copper-based-aluminum-fin design. So the two fin set and a bigger fan powerful enough to handle two RV670XT GPU?