I have an Nvidia DP Sledgehammer CRB which turns out if a reference board and finding anything out about it is impossible outside of its a reference board. It's AGP so Nforce3, Retroweb Discord says maybe Nforce3 150/Pro

If anyone has any more information on it, please let me know, it seems I have a piece of history, I've got some ECC Registered Ram on the way to test it