ESXi tip : power management option greyed out? check your BIOS setup

Have seen this in the past with using HP’s in particular and using their inbuilt installation wizard when setting up the hosts, can set the performance option but afterwards is greyed out when checking the web / traditional client.

Go to Bios settings section and need to set OS control or OS Control Mode depending on whether your using a Dell / HP

http://www.vmware.com/files/pdf/techpaper/hpm-perf-vsphere55.pdf

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