For those waiting on the info for the MSI Z170A M5 Gaming board and 7x GPU support I finally have it working on both of my boards.
1) Make sure you're running the latest BIOS!
2) Enable 4G
3) Set PCIe support to "Auto" - DO NOT MANUALLY SET TO GEN1. THIS CAUSES MAJOR ISSUES
4) Enable onboard graphics startup as first! I believe this is changing "PEG" to "IGD" or something in the Advanced BIOS
5) Plug your monitor into the ONBOARD graphics
6) Use either simpleminer-RX-v1093-4.11.rc8-16.60-enableexe0ANDips0.imgc or simpleminer-RX-v1093-4.11.rc8-16.60-enablerc60.imgc (sorry, I don't remember which I used!)
My 14x GPUs have been stable all night long!
How did you manage to reduce power from the wall? I bring up 10 video cards but the power is nearly 1700watts. I have try with moded bios but no difference. On W10 i have managed for 6 v. cards to consume less than 800watts.
SM is a great thing but without voltage control is not acceptable.
Thanks to Soothaa continuing after I gave up. I can now run 7 570s on my 170a boards!
Anyhow, I've been carefully watching my power usage due to having to make sure I'm balancing the load of my machines across circuits. I'm not doing anything with the bios tuning to try and lower my power but I do set all them to power stage 4. With that, a 7 gpu rig runs under 1000w at the wall or just under 9 amps.