Next gen ATI chipset specs, possibly

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North Bridges for Intel Pentium 4 Platform
RS250: An updated version of the current RADEON IGP340 with PC2700 DDR SDRAM support that is due in the first quarter 2003. Will also offer 533MHz Quad Pumped Bus, AGP4x and the same I/O capabilities as the predecessor.

RS300: Definitely a more interesting product for hardware enthusiasts than the previous one. It will support the Pentium 4 Northwood and Prescott processors with the Hyper-Threading technology and 800MHz Quad Pumped Bus. Besides, it will allow dual-channel memory configurations using PC2700 or DDR400 modules. What is very important, ATI will incorporate the RV250 (namely RADEON 9000) graphics core in this chip, hence, expect relatively high performance and DirectX 8.1 support from the part. As all the latest core-logic devices, this one will provide AGP 8x. The unit will appear in late Spring with mass-production to start a bit later.

I wonder about the performance of integrated graphics core: 6.4GB/s provided by dual-channel DDR400 is just enough for the CPU, but may not be enough for a powerful graphics core and a CPU; I remind that the original RADEON 9000-based graphics card requires 6.4GB/s peak bandwidth.

RS300VE: Simplified version of the RS300 with only one memory channel.

North Bridges for AMD Athlon 64 Platform
RS380: AGP 8x-supporting tunnel with integrated RV250 (RADEON 9000) DirectX 8.1 compliant graphics core. ATI will integrate additional 64-bit memory controller in the tunnel and will allow end-users to install a memory module as a frame-buffer.

RX380: An ordinary AGP-8x tunnel without integrated graphics capabilities.