Hot on the heels of the rest (okay a little late to the party) Gigabyte releases their RadeoN HD 7990. The product has SKU name GV-R799D5-6GD-B and is a reference product with a 1000 MHz core, and 6.00 GHz and 6 GB of graphics memory. 4.6 Billion transistors per GPU, 4096 Stream processors, 8.2 TFlops and 6 GB of memory.

Impressive eh? AMD bakes GPU's on the 28nm node, in very simple wording that means they can put more transistors on a smaller silicon die area.Memory volume wise the R7990 cards will pack a massive 3 Gigabyte of DDR5 memory per GPU, so that's 6GB in total. This is not done for bragging rights, but AMD simply takes Eyefinity and multiple monitor usage more serious, it is there where the extra memory makes sense. The memory bus of course is still 384-bit (x2) as well. Packing so many transistors on a product is staggering, but if you can't apply a fast enough clock frequency it would become a problem. Well, that's not an issue for AMD either, the Radeon HD 7990 is clocked at a very fast 950 MHz with a boost capability of 1000 MHz.