An update for what it's worth. The motherboard we're using is a Supermicro H8DME (but the POST screen says H8DM8, oddly enough). Either way, we flashed it with the newest BIOS from 9/7/07 and now it works. Old BIOS was 11/28/06, so there's a clue to why it wouldn't even turn on before. Got a set of 2347s with 16GB of PC5300 ECC in there, and they're now building out the server to install an OS on it and start testing it. As far as working properly, we'll have to see but the BIOS is counting 8 cores. I took pics, but they're on the phone, so I'll have to get them off when I get home tonight if I can figure out how.

Just letting s7 and Dave know in case they want to know of another board that works. If the machine gets setup and I have access to it, I'll run what tests I can, but we'll see what they're doing with it first.