The guys from OC Workbench claim AMD has pulled the launch of the RV670 GPU forward to November 15th, 2007:
There will be two models initially, a Pro and a XT model. Both uses the RV670 which is 55nm based, has 320 stream processors and a 256-bit memory interface.
There will be 2 versions of RV670; Gladiator and Revival. Gladiator is clocked at 825MHz core and 1.2GHz memory while Revival is clocked at 750MHz core and 900MHz memory. Gladiator has 512MB of GDDR4 memory and Revival comes with either 256MB or 512MB of GDDR3 memory. These cards will be single slot and is fully DX10.1/SM4.1 compliant. It supports PCI Express 2.0, UVD as well as the next generation Crossfire technology.*
Early benchmark numbers using beta drivers shows that the HD 2900Pro with a Q6600 quad core processor scores around 10500 marks.