Comment by tuvan

600W from a tiny connector is questionable but the issue isn't caused by the 12VHPWR connector. Fault happens on the part that converts 4x older PCIe into the new headers. So this is an adapter issue and not something related to the PCI SIG design. According to Igor's labs investigation what happens is one or two of the welds in the adapter crack and adapter turns into 2x PCIe to 12VHPRW which is not what it's specced out for.