Cost me a few hours but Gigabyte H110-D3A mobo is working with 6x GPU (AMD RX570). using Ethos version 1.29. getting about 160Mh. You must disable onboard VGA and connect monitor to GPU0. Enable mining in bios. Then it works...
MOD your GPUs BIOS and at least use the following clock speeds: gpu 1150/ mem 2100.
You'll get around 175 mhs.