I'm having the same problem. It first appeared on my new 7950x homelab-server with an AsrockRack Board.
Board was swapped by the distributor, problem persisted.
Yesterday i had to move an entire rack at a customer site and updated the proxmox-server at this point. This morning the system had rebootet without any further notice. Same behavior as with my 7950x.
It seems that on systems without watchdog, the host freezes. With watchdog, it just reboots.
Customer EPYC was working with 6.5 perfectly, now 6.8 had the reboot issue. Will switch back to 6.5 this evening and see what happens...
On the other hand, my 5950x system is stable as a rock with 6.8...
Board was swapped by the distributor, problem persisted.
Yesterday i had to move an entire rack at a customer site and updated the proxmox-server at this point. This morning the system had rebootet without any further notice. Same behavior as with my 7950x.
It seems that on systems without watchdog, the host freezes. With watchdog, it just reboots.
Customer EPYC was working with 6.5 perfectly, now 6.8 had the reboot issue. Will switch back to 6.5 this evening and see what happens...
On the other hand, my 5950x system is stable as a rock with 6.8...