The best practices for ESXi host BIOS settings

The BIOS settings will vary, depending on the hardware manufacturer and the BIOS version. Supported BIOS versions should be verified on the VMware HCL for the hardware selected. The following screenshot shows the HCL details of a Dell PowerEdge R620, with the supported BIOS versions:

HCL details with supported BIOS versions

If the hardware is supported but the running BIOS version is not supported, the BIOS should be upgraded to a supported version.