VMware ESXi includes a full range of host power management capabilities in the software that can save power when a host is not fully utilized. Make sure your BIOS version supports AES-NI (in some cases a BIOS upgrade might be required for AES-NI support) If your hardware supports AES-NI and your deployment will be able to make use of the feature “VMware vMotion Recommendations” and “VMware vSAN” : If the BIOS allows the memory scrubbing rate to be configured, we recommend leaving it at the manufacturer’s default setting.ĩ. See “ESXi General Considerations” on page 19 for further details.Ĩ. This might include, for example, unneeded serial, USB, or network ports. Disable from within the BIOS any devices you won’t be using. NOTE: After changes are made to these hardware-assisted virtualization features, some systems might need a complete power down before the changes take effect.ħ. Make sure any hardware-assisted virtualization features (VT-x, AMD-V, EPT, RVI, and so on) are enabled in the BIOS.In most cases you will get the best performance by disabling node interleaving (in other words, leaving NUMA enabled). Some NUMA-capable systems provide an option in the BIOS to disable NUMA by enabling node interleaving.Make sure hyper-threading is enabled in the BIOS for processors that support it.Enable “Turbo Boost” in the BIOS if your processors support it.Make sure the BIOS is set to enable all populated processor sockets and to enable all cores in each socket.Make sure you are running the latest version of the BIOS available for your system.This section lists some of the BIOS settings you might want to check, particularly when first configuring a new server. The default hardware BIOS settings on servers might not always be the best choice for optimal performance.

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