Test setup:
Octominer motherboard
* Crucial 4GB DDR4 SODIMM
* No storage. Using PXE netboot.
1x HD 7950 Monica BIOS 1
HP 656364-B21 1200W Common Slot Platinum Plus
PSU breakout board
VGA-plus-USB Ethernet KVM
Ubuntu Server 14.04.5 LTS - Kernel 4.4.0-78
Radeon 15.12 Linux drivers
Results:
Hooking up the PSU was fairly straightforward. I simply connected every 6-pin plug on the motherboard to be sure it was getting enough power. I'm certain all of them were not necessary for this test, so I can try fewer connections to see where the limits are.
I enabled PXE boot, and configured my PXE/DHCP server with its MAC address.
Switched on power. Got 5 beeps. Did not stop it from posting, though.
Linux started, and everything appears to work the first time. I am reusing a disk image from an AM3+ build.
Power draw with no GPUs.
* 20 Watts @ idle from the wall.
* 6 Watts when the motherboard is powered down. The PSU does not turn itself off. I will experiment with this later.
I will try fitting some more cards this weekend. There is roughly 50 mm between slots (PCB to PCB).
So far, good stuff.
https://i.imgur.com/LG7EjBQ.pnghttps://i.imgur.com/ilTWmLP.pnghttps://i.imgur.com/kVknbvq.pnghttps://i.imgur.com/B7yOGVP.png
