Do not go with any MSI motherboard, I unfortunately learned the hard way and after spending a couple days trying to troubleshoot what was wrong with my machine (PSU, risers, GPUs, etc...), slowly learned that there are LOTS of people in the mining community who have issues with majority of MSI boards, which was unfortunate because I was originally recommended this board..

Anyways, I'm trying out these 2 now.. Both were recommend to me from several miners.. ASRock tends to be a very popular brand, but these are what I went with


This one holds 6 GPUs using risers of course and
https://www.newegg.com/Product/Product.aspx?Item=N82E16813157748

This one holds 13 but I wouldn't recommend going over 6 per rig just out of stability and maintaining it to stay online...
https://www.newegg.com/Product/Product.aspx?Item=N82E16813157781&cm_re=h110-_-13-157-781-_-Product


I haven't used the ASRock mobos yet but they are being delivered today, I can report back later tonight after I have everything setup if you'd like.. or send me a message