My first build failed. Here's what happened:
Install two E5-2670v2's in each socket (inadvertently bent two pins in CPU socket 1 but those are easy enough to fix)
Install the RAM (Kingston EEC DDR3 1600 MHz)
Install the mobo to the case
Install Corsair AX1200i PSU
Install two Cooler Master 120M's (fans setup to pull)
Install AMD 5760? Radeon (cannibalized from a Mac Pro
Wire everything up like a champ with some 4TB HDDs
Turn the PSU on and...more lights than there should be...
The power and reset switch LEDs were ON, as was a third LED nearby the bottom right corner and the BMC LED near the bottom leftish edge. Now that I know better, that was the first sign of trouble. Hitting the power button activated everything (from case fans to GPU) but alas, the little workstation was a vegetable. The status LEDs stayed at 00 and would occasionally flicker. I sequentially removed everything (including the mobo) until the only things left were a CPU and a lonely stick of RAM. Still nothing. The board was dead, and my research group's wallet got a bit lighter...
Yesterday the second board arrived. This time it was bench tested while sequentially inserting every component. Success. Turning on the PSU only illuminated the power LED, and the status LEDs happily blither on while POSTing. The first problem? Probably something annoyingly minor. I've learned that the simple answer is often the correct one; and sometimes a dead board is simply a dead board. There may be one innocuous component that has failed, but it's enough. Hooray for engineering standards, but I digress.
I'm happy to answer whatever questions I can.