OCWorkBench reveals AMD's upcoming 890GX chipset will feature Radeon HD 4290 integrated graphics, which will deliver about the same performance as the 790GX. This new chipset will not feature USB 3.0 support, but some motherboard makers plan to make motherboards with NEC's USB 3.0 controller.
The upcoming AMD 890GX integrated graphics is AMD Radeon HD 4290. It supports DX10.1, UVD2 and has its GPU core running at 700MHz. Basically the GPU performance would be similar to the AMD 790GX.
The release of new boards based on this chipset is to support the upcoming hex core or 6 core processor Thuban. In addition, the upgraded south bridge SB850 will support native SATA3.