I tried installing with Corsair 8GB modules and kept getting Dr. Debug code 53. I checked the compatibility list and swapped the Corsair for Kingston KHX1600C9D3K2/8GX which is definitely on the compatibility list.
I've tried every combination of memory slots with multiple and single memory sticks. I get code 53 every time. Even with no RAM installed.
I've unplugged everything but PSU, CPU and fan and tried every memory configuration... still code 53.
I've tried six brand new memory sticks and none of them seem to work with the board.