The Dual GPU, 4GB GDDR5 Pixel-Punching Beast is pretty much the official name. I think.
The reference card (pictured above by 4Gamer.net) has been shown off by AMD (ATI) at the Asia Pacific tech event. The 6990 4GB will fill the slot of 6xxx answer to AMD's older dual-GPU card; the 5970 2GB.
It will likely be based on the 6970's GPU, of the Cayman architecture, giving it a total of 3,072 stream processors. It could, however have slightly less and be based on the 6950 - a move I don't think AMD would pull unless they intend to have two dual-GPU cards occupying the top spot (perhaps a dual-6950 based 6980?).
Round back, we can see four mini DisplayPort outputs, along with a single DVI slot. That's no Eyefinity 6 - but then MSI, Asus, Evga, XFX etc. love to handle that themselves. Of course, some crazy folk will chain a couple of these bad-enough-as-it-is boys up in CrossFireX.
Here's awaiting more info.
