@DustinB Thanks for your reply! Yes, all of these Lenovo ThinkSystem ST250 V2 servers were delivered preassembled from the manufacturer with identical hardware configurations. The only customization done was the installation of XCP-ng 8.3, and the deployment of the same two VMs on each host. We didn't modify BIOS settings manually after delivery. The worrying thing here is that we do not have this problem on the same Lenovo ThinkSystem ST250 V2 hardware where we have installed Windows server. If you have any suggestions on how to verify or normalize power management behavior across identical units, that would be really helpful!