One of my customer brought sent this this to me and I thought I should share this. Start----------------- After the installation of vSphere5.1 and the setup of vCenter, we started migrating machines onto this new ESX Cluster (we have a 12 node 4.1 Cluster) What we noticed was that when vMotion the VMs from one host to another, we got inconsistent CPU values. These VMs have clean windows install. The spike in CPU is after it has migrated to ESX hosts 3,4,5 or 6 and when we moved it back to 1 and 2 it went back down. We were thinking it was doing some work but after one hour, the CPU stays at a constant 20-30% with these processes. Also the Hosts had only 1 machine running on it so it could not be a lack of resources. Automatically we assumed that it was VMware Tools but the issue still persisted after we uninstalled VMware tools. After much troubleshooting, we found out the cause and it is the power settings of the HP server which has to be set in...