Although the company claimed that it had already begun shipping the products in late September, volume shipments of the two PCIe-enabled chips are expected to start in mid-November, the sources added.More info at DigiTimes
The Radeon Xpress 200-series chipsets are ATI’s first chipsets to support the Advanced Micro Devices (AMD) K8 platform. They will compete with the Nvidia nForce 4 series and the K8T890 K8 chipsets from VIA Technologies.
ATI to start volume shipments of Radeon Xpress 200 chipsets

The RX480 North-bridge chip from ATI will be marketed as Radeon Xpress 200 and the RS480 with integrated graphics core will be launched as Radeon Xpress 200G.