ATI/AMD R600 Details Emerged
 

R600 in different sizes:

"ATi briefly mentioned to their partners a 2nd generation Unified Shader Structure and a new hardware Crossfire for R600 family which can be bridgeless yet faster. The retail card is half an inch longer at 9.5 inch and the OEM/SI version remains the same at 12 inch. It comes with 512-bit memory bus and 1GB DDR4 at more than 2GHz frequency. Core clock remains a mystery as yet.

http://www.vr-zone.com/?i=4595