Just like the PCIe 5.0 specification, Intel’s ATX 3.0 spec introduces a number of new measures intended to support upcoming graphics cards with extremely high power draw. Among those are some stringent tests that products have to pass before the manufacturers can call them “ATX 3.0”-compliant. Unfortunately, vague language in Intel’s documentation

Source: Hot Hardware – PSU Manufacturers Can Skirt ATX 3.0 Tolerance Testing By Skipping This Feature