PassMark offers a legitimate free evaluation version. This allows users to run short tests (usually 15 minutes) to verify their hardware.
Most hardware fails either very early or very late in its life (the "Bathtub Curve"). Burn-in testing catches these "infant mortalities" before a customer receives the PC. BurnInTest Professional 2021 Free Download
Support for specialized plugs to test physical port reliability. PassMark offers a legitimate free evaluation version