I am using your 2U Twin2 6016TT-BIBQF Super Server. If I boot up one node at a time, it is Ok. If I boot up 4 nodes at the sam time, then there is always one node that cannot power on. The system has 8x 5570 CPU, 24x DDR3-1333 and 6x SATA 80G HDD. What could be the issue?
Not enough power for your configuration.
CPU 8 x 95W = 760W
HDD 6 x 25W = 150W
MB 4 x 40W = 160 W
DIMM 24 x 10W = 240 W
Higher rated power supplies like 1.4K and 1.65K will be available later.