Have been reading back in the threads a few weeks but haven't found anything that I haven't already tried or specifically related to my mb and gpus.

Asus Prime Z270-A
GeForce GTX 1070 Windforce OC 8G x6

Updated BIOS on the MB
Disabled Sound
Power ON after power loss selected
On board graphics - Enabled selected IGFX
All PCI speed to Gen 2
Above 4G Enabled
ASPM is Disabled
Plugged into the onboard graphics via the HDMI port

SMos boots from my 128G USB2 pen drive with the NV version but see's only 2 of the 6 GPU's.  I've unplugged all but three for now.  If I can get 3 going I'll move on to 4 and so on.

I've checked all my risers and cards and they all work in Windows 10 but also not at the same time.  Just fyi I also had an MSI Z170A SLI Plus and sent it back thinking it was a mobo issue.

Has anyone had any success with this board and gpu combo yet?  If so what am I missing or not setting correctly in the BIOS?  On the PCI speed I've tried all settings... Auto, Gen1, Gen2 and Gen 3.  The setting listed above are what I have set currently.

Thanks in advance for any and all help.

Actually hardware wise I've already change motherboards thinking it was the MSI Z170A SLI Plus that I started out with.  I sent it back to Amazon earlier this week and ordered the Asus.

The risers are directly powered by the SATA cable from the PSU.  These are the risers... https://www.amazon.com/Extender-Powered-Extension-Adapter-Card-Currency/dp/B072MFBYCM/ref=sr_1_10?s=electronics&ie=UTF8&qid=1499386958&sr=1-10&keywords=PCIe%2BPowered%2BRiser%2BAdapter%2BCard%2B-%2BUSB%2B3.0%2BPCIe%2B1x%2Bto%2B16x%2BExtender%2BCard%2B-%2B6-Pin%2BPCI-E%2Bto%2BSATA%2BPower%2BCable&th=1

Yes I have swapped them around many time, but when I was on win10, haven't yet with nvoc as I just got it going tonight.  All of them worked in that testing.

Just a side note here....  I shut down the rig after I posted the first post and just powered it back a few mins ago.  Getting this scrolling on the terminal now...

bash: /media/m1/1263-A96E/oneBash: Permission denied
dos2unix: /media/m1/1263-A96E/oneBash: No such file or directory
dos2unix: Skipping /media/m1/1263-A96E/oneBash, not a regular file.

I have to laugh at myself cause I've obviously dorked something up I guess.

First off thanks for all the work Fullzero!  

I've been fighting with Win10 on my rig for a month.  Can't get it to recognize any more than 3 of my 1070 cards, and one always is disabled with an error.  So I've decided to dump Win10.

I've just got nvoc 0017 running with my old USB 2.0 stick on my ASUS Prime Z270-A with 6 Geforce GTX 1070s rig and I am not sure now how to get the mining started.  

I guess I was under the impression that it would start automatically on boot but I must have missed something in the setup.  It's just sitting there with the terminal screen open.  

Also in the Nvidia X server settings it's also only recognizing 3 of the 1070 gpus.  I'm hoping this is something that can be easily worked out as I'd hate to think that 3 of the 6 1070's I have only had for a month are bad.

Thanks in advance for any help.