Here's some more information about the NVIDIA Nforce 4 chipset. As you may already know this chipset supports Socket 754/939/940 and will have multiprocessing capabilities. You will be able to use it as a single CPU platform, but also as a two way, four way and even up to eight way as a multiprocessing platform.
This chipset will support a maximum of 32 PCI-E lanes says Theo, has suggested 1x16 X PCI-E slot, one 1 x 8X for SLI card and four times one lane for peripheral devices. This definitely confirms our previous claim that Nforce 4 will be a platform which will let you plug two Geforce 6 series PCI-E cards into a machine and end up with a much cheaper MP machine than those based on Intel's "Tumwater" chipset.
The chipset will support five PCI slots, two times Nvidia Gbit Ethernet and Nvidia RAID, similar in function to Intel's "Matrix Array", says Theo.
It will support eight Serial ATA drives and six P-ATA drives, and also 10 USB 2.0 ports. On the sound side this chipset will feature SP-10, Soundstorm 2 audio that will be Dolby Digital 5.1 compliant and it will be able to do EX effects at 20 Gflops processing power. Soundstorm 2 supports 5.1, 6.1 and 7.1 speaker configurations.