I have an R730 with up to date firmware for the BIOS and iDrac - it's also set to UEFI. It's running ESX and I need to have some Win11 VMs on there, so I need to add a TPM module to the server. I bought the proper modules from our account rep and went to install them this past weekend starting with a test R730.
I powered it down, removed the power cables, waited a few minutes, then opened it up, installed the module, closed it up, powered it up, and POST failure. It hangs at Initializing Intel Quick Path. After a couple of minutes, it reboots itself and hangs at the same place. I powered down, removed power, yanked the module, powered up, and it boots without issue. I even tried a second module to see if something was wonky with that one, but no joy.

Kind of at a loss here. Is there a step I'm missing? This seems pretty straightforward, and I've been slinging cards and building PC/server systems since the mid-90s, so this isn't my first go-round... any ideas?