Coincidentally, one of my PSU's failed last night, but in a way that assisted analysis: it went flashbangsmoke, as would be expected of any cartoon PSU. Swapped it out with an ATX 2.2-spec unit rather than the 2.0-spec (and incidentally noted a 750W/820W unit was the most efficient at the power this box normally consumes). Took me a while to realise the 8-pin ATX-12V connector slides apart to form two 4-pin units. Also looked longingly at the two spare PCI-e 6+2 feeds: my video card doesn't need one, but now I've got these connectors mocking me. This could be an expensive PSU by the time I've fnished. I've got to open the case anyway, to locate and destroy the bright blue light in the PSU.