I'm not positive. The Asus uses the nvidia sli x16 chipset, as does the MSI, but MSI lists nForce4 SLI x16 MCP(nForce4 SLI) / nForce4 SLI x16 SPP(C51D) in the board specs. Asus does list the chipset as nForce SPP 100 / nForce4 SLI, but I haven't heard mention of C51D with the Asus board. It seems close enough to me that I wouldn't be worried, except that the nvraid disc that came with the MSI (for xp32) specifically mentions the C51D chipset.
well, I'm going to leave all of that babble so this will make sense: I did some more research and the C51D was code named SPP 100. That answers my question. Thanks TG2 🙂