The Radeon X2800 XTX. The OEM version of this card measures 12.4-inch and has 1024MB memory. This card uses 270W.
The retail Radeon X2800 XTX is about 9.5 inches long and consumes 240W, it has the same clockspeeds and also 1024MB memory.
The third card is the lower-clocked Radeon X2800. It has 512MB GDDR3 memory and will be 9.5-inches long. This card also consumes 240W and it needs two motherboard slots. Availability is expected in April.
A lower-clocked R600 codenamed UFO. This one has 512MB GDDR3 memory, dual DVI and TV out but no Vivo. It's 9-inches long and uses two PCI slots. The power consumption of this card is 180W and it's expected in April.
A fifth version with higher clockspeeds and watercooling may also follow.