We finally managed to find out the commercial name behind cards based on a pair of ATI R600 chips. The top of the line card will be known as the Radeon X2800 XTX2 and will be the same concept as NVIDIA's GeForce 7950 GX2 card. So you can expect two R600 chips on a card. We don't know how DAAMIT plans to implement this, as we may be talking about two PCB's or maybe just one. NVIDIA went for two PCB's last year with its GeForce 7950 GX2 and our money is on ATI following a similar route. We also have the rest of the specifications, although final clocks may still change slightly. Which is not new, but as usual with any upcoming new product these days. - The Inquirer

ATI's Radeon X2800 XTX2, their dual-GPU R600 card

Both chips should end up clocked at 575MHz core and 2000MHz GDDR4 memory. This version has the 256-bit memory controller probably because of technical difficulties to make two chips work at 512-bit memory controller speed. The card is equipped with two times 512MB memory, a total of 1GB, and has two times 96 shader units. It is made using a 80 nanometre process. The best of all is that it will cost $600. This was ATI's best kept secret so far but NVIDIA is also doing some dual G80 card to compete this one, which will most likely follow the GeForce 7950 GX2 logic.

The single R600 called Radeon X2800 XTX will be clocked at higher speeds with better specifications. Stay tuned... Oh yes, this is how Quad CrossFire is actually going to work. Just plug two of these cards.