"This dual chipsets will replace the AMD 790GX+SB750 in the upcoming months.
The 890GX is basically an upgrade of the AMD 790GX north bridge. The internal graphics core remains at 700MHz but has DX10.1 and UVD 2.0 support. It can be setup to run Dual 8x crossfire.
The south bridge SB850 is an upgrade from SB750. THe major difference is that it supports SATA3 or SATA 6Gbps.
The chipset will start sampling in November 2009. It is expected to be launched in early 2010."