ATI keeps it coming. Not only do they currently have the most powerful GPU on the market today, now they are putting 2 of those GPUs on a single card.  Introducing the ATI Radeon HD 5870 x2 and the HD 5850 x2.  Images of these huge graphics cards have been leaked through Hardware Canucks.

Sources [Hardware Canucks, CrunchGear]

ATI has introduced two new players to the GPU market.  Powered by the latest Radeon 5800 Series GPU: the Radeon 5850 and Radeon 5870.  Compared to the Radeon HD 4890, it has twice the number of stream processors, twice the transistors, twice the texture and pixel blending power and is worth twice as much. The 5870 is very competitive at a price of $379 and being as fast as the GeForce GTX 295 with 2 GPUs.

ATI Claims:

ATI Radeon™ HD 5800 Series graphics processors are the most technologically advanced and feature rich GPUs AMD has ever created.

Sources [Ubergizmo, Engadget, HardOCP, ]