The entire lineup features Avivo HD technology, so the firm decided to replace the X-prefix with a HD-prefix. So the R600 will be launched as the ATI Radeon HD 2900 XT. The cheaper RV630 will be launched as the ATI Radeon HD 2600 and the RV610 will be known as the ATI Radeon HD 2400.
They also uncovered some other details:
The AMD ATI Radeon HD 2900-series features 320 stream processors, over twice as many as NVIDIA’s GeForce 8800 GTX. AMD couples the 320 stream processors with a 512-bit memory interface with eight channels. CrossFire support is now natively supported by the AMD ATI Radeon HD 2900-series; the external CrossFire dongle is a thing of the past.Here's a photo from a R600 card:
The R600-based ATI Radeon HD 2900-series products also support 128-bit HDR rendering. AMD has also upped the ante on anti-aliasing support. The ATI Radeon HD 2900-series supports up to 24x anti-aliasing. NVIDIA’s GeForce 8800-series only supports up to 16x anti-aliasing. AMD’s ATI Radeon HD 2900-series also possesses physics processing.
New to the ATI Radeon HD 2900-series are integrated HDMI output capabilities with 5.1 surround sound. However, early images of AMD’s OEM R600 reveal dual dual-link DVI outputs, rendering the audio functions useless.