Hardware vendors have settings in BIOS/UEFI to regulate how much power each processor core can use. By default, the settings usually allow the server to reduce core speed to save power. The settings that control this behavior vary from manufacturer to manufacturer. For example, this setting is sometimes referred to as a C-State, while others may call it something different. Note that sometimes to ensure full power, multiple related settings may need to be configured. Vendors may also have recommended profiles for virtualization.
Refer to the hardware vendor’s documentation for the server’s particular CPU configuration to determine the appropriate CPU power profile configuration.