I bought a couple of Dell R720xd servers a while back. One for Proxmox and one for TrueNAS. They work great for my needs and I’d like to upgrade them for some basic local LLM and other GPU workloads.

I’ve seen a number of folks post on YouTube with working Tesla P40s in their 720xd servers. So I buy a couple along with the wiring one of the posters linked.

I also picked up 1100W PSUs and threw those in there. iDRAC and the BIOS are updated to latest.

However, when I try to boot with the GPU installed the server won’t boot, the PSU blinks orange, and there are zero logs in iDRAC as to what the issue might be. This happens even on a dedicated 20A circuit with no other load.

Anyone out there have any ideas?

ETA I got them working. I’d tried two different cables and neither worked for me, but this cable from Amazon did: GinTai 8(pin) to 8(pin) Power Cable Replacement for DELL R730 and Nvidia K80/M40/M60/P40/P100 PCIE GPU