The X10DRi boots fine with either CPU in CPU slot 1, but fails to boot and gets stuck on post code 79 if a CPU is in CPU slot 2. I tried minimizing the ram for CPU slot 2 and swapping out different sticks but still had the same problem. Memory is CMK64GX4M8A2400C14.
Please use the memory under the X10DRi Tested Memory List. X10DRi does not support un-Buffered DIMM such as the CMK64GX4M8A2400C14.