I have stumped both Asus(7 calls) and SuperMicro(3 calls).
The current thought is this motherboard and case are incompatible.
My CPU fans power on as soon as power supplies(redundant) are plugged in.
It does not boot yet until I hit the power button.
It does function normally, created Raids, installed OS, runs nice, BUT won't totally power off either.
IF OS Start>shutdown OR if Power Button is pressed; result is a shutdown of the OS and then seems asleep or hibernated, the CPU fans are still going, as are the case fans, and the power button flashes green. Fans Never goes OFF.
This does happen no matter how much or how little accessories/components are installed.
Currently only 1CPU(opteron6328) 1 Stick Mem, and only the front panel power switch.
Vendor exchanged motherboard, so I have had two new identical KGPE-D16 with same problem.
A different Power supply (Antec 550) will NOT have this problem.
Today I tried it with a KFN5-D SLI I happen to have laying around, it works in this case just fine.
I really wanted this case and Motherboard to work with eachother, if I refund the case I'll have a hard time finding a dual PSU rackmount with 8 swappable drive bays under $700, and the freight is crazy expensive to ship back, with restock fee, ouch!
Choosing different motherboard is way too inconvenient, already have 32GB Ram and the Pike2208 HW Raid card.
I have the current bios, even tried downgrading four versions then upgrading one at a time they all act the same. This is not my first rodeo, been an Asus-only guy for 17 years. In the IT business for 14 years. Fan of the SuperMicro 3U line of cases for about 6 years.
I'd love to get this working, there is little enough margin in hardware.