Same issue here, they blame the PSU company for poor quality yet they're pushing well above the power spec with a single pci-e auxiliary power port.
I've had 3 Modules catch on fire so far and 2 PSU's burn up all the while KNC acts like nothing is wrong and won't pay me for the burned PSU's or down time due to their failed engineering. BTW they use Standard Terminals....

Here's the spec:

Connector	No. Pins	Std Terminals	HCS Terminals	Plus HCS Terminals
Six Pin	2	192	264	288
Eight Pin	3	288	396	432

Only two +12 V pins are used in the six-pin connector, even though most power supplies include three.
Standard terminals are rated eight amps.
HCS terminals are rated 11 amps.
Plus HCS terminals are rated 12 amps.
All ratings assume Mini-Fit Jr. connectors using 18-gauge wire under standard temperature conditions.

https://imgur.com/a/1mDek#0