I returned home from vacation to find my HP z800 powered off, and attempting to power on intermittently. Initial suspect was the PSU, and seems to be the case from reading other posts. Removing the PSU and plugging it directly to the wall causes the fans to spin for a second then fail.
The original PSU is 1100W (P/N 480794-003). There are currently six WD Red Pro HDDs in the system that I plan on moving to a SAN, along with the RAID card. Since only the NIC, CPUs, and RAM will be running in the system; is it alright to install the 850W PSU (P/N 468929-003)?
I don't know much about electricity. The connectors on the PSU look the same, and the two Xeons, NIC, and RAM shouldn't draw the full 850W.