pc ram - 4gb
7 x rx480 8gb
I dont know what exactly helped to run 7 gpu, but here what I changed:
above 4g decoding - enabled
pcie switch to gen 1
dmi max link speed switch to gen1
disable all sata, which is not used
disable all usb, with is not used
Ok, I have replicated Andrews experience.
Here's what I found:
-- Had to flash the BIOS. Board shipped with 5.0.0 and I updated it to the latest (7.0.0 I think)-- this is necessary to get the "Above 4g decoding" option. Which appears on the boot menu in the bios.
-- PCIe switched to Gen2
-- Didn't make the other changes.
WARNING WARNING WARNING
When I flashed the BIOS the onboard network hardware stopped working with linux. this caused a bunch of problems.
I had to run this utility to refresh the network drivers ROM to make things work:
https://downloadcenter.intel.com/download/19186Current setup for this board-
-- Ubuntu 16.04 server
-- 7x NVIDIA 1070 8GB Cards
Working fine. (And about %10 more hash under linux than under Windows.)