Some more info about the RS690 chipset was unveiled today:
The upcoming AMD 690G is expected to feature a Radeon X700 derived graphics core that’s been renamed ATI Radeon X1250. Features of the integrated ATI Radeon X1250 include full support for DirectX9, shader model 2.0 support and AVIVO. The AVIVO video engine of the Radeon X1250 supports hardware accelerated H.264 and VC1 video processing for Blu-ray and HD DVD playback.
In addition to the standard RS690 there are four other variants including the RS690C, RS690T, RS690M and RS690MC.The RS690C will be the base chipset and lacks an integrated TMDS transmitter while the RS690T is the high-end variant with support for external video memory which is referred to as Sideport Memory. The RS690M and RS690MC will be targeted towards AMD Turion powered notebooks.