According to
VR-Zone, Nvidia is bringing out a new MCP89E chipset that will support DDR3 memories natively. It share some similarities with the MCP79 chipset supporting Intel mobile processors for Centrino 2 platform. While MCP79 supports 2Gb DDR2/3 devices, MPC89E is able to support 4 Gb DDR3 device. However, MCP89E supports only 8 PCIe lanes instead of 20 on MCP79.