Restart the computer
Enter BIOS/UEFI setup during startup
Look for BIOS Version, BIOS Revision, or Firmware Version on the Main, System Information, or Information screen
In Windows, press Win + R, type msinfo32, and check BIOS Version/Date
In Windows, open Command Prompt and run wmic bios get smbiosbiosversion
In Windows, open PowerShell and run Get-CimInstance Win32_BIOS | Select-Object SMBIOSBIOSVersion
On macOS, click the Apple menu, choose About This Mac, then System Report, and check Boot ROM Version
On Linux, run sudo dmidecode -s bios-version
On Linux, check /sys/class/dmi/id/bios_version
Check the motherboard or system manufacturer support app or utility
Check the label or documentation on the motherboard or device if available