According to the leaked specifications, the HD 7990 will feature two Tahiti-XT 7970 graphics cores using the 28nm architecture, with 8.6-billion transistors and 4,096 processors combined, a total of 256 texture units, 64 ROPs, and a massive 6GB of GDDR5 memory shared across both of the GPUs using two 384-bit channels.
As with the previous dual-GPU release, each GPU-core will be clocked slightly lower than their respective HD 7970 models, at 850MHz (HD 7970 has 925MHz) with the frame buffer set at an effective 5,000MHz, which again is 500MHz lower per GPU-core than the HD 7970 is clocked at.
There is currently no word on the TDP wattage, or the number of power connections, though it is very likely it will employ two 8-pin sockets. There is also no news on crossfire support either, but it is safe to assume that you’ll be able to at least pair them up in crossfire, as with the previous generation HD 6990.
This new dual-GPU model will pack a monstrous punch and you can bet a monstrous price.
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