Uh oh - my X99 Deluxe is refusing to boot. Was running XTU's inbuilt stress test at 4.5 core, 4.2 uncore, 1.3V CPU 1.3V cache and machine suddenly shut down. RAM not yet touched. Tried rebooting and machine flicks on for a microsecond before the an audible OCP 'click' from the PSU.

Tried pulling the PSU cable and letting caps discharge for about 15min, tried booting again and machine will power on and stay on but noone's home - none of the POST debug LEDs are lighting and the board is stuck on POST code '00'. Have tried clearing CMOS several times and removing everything but CPU, RAM and one GPU with no change.

Any ideas folks?