http://wccftech.com/amd-radeon-hd-7990-images-details-surface/
This would be quite the monster performer!
The card, in terms of specifications will come with a 1 GHz core clock speed with the memory clocked to 1250 MHz.
The card will come with 6GB of DDR5 memory that is allocated as 3GB per GPU. The GPUs will both have 2048 stream processors each and the card being powered up by two 8 pin connectors. In terms of display, there will be one dual-link DVI port, with the additional four mini DisplayPort connectors.
The card is slated for a proper hard launch by AMD on the 17th of April and the price has been set at US $849.
This would be quite the monster performer!