ETH Mining 6 GPU Problem

[tomduk]

Hi,

I have just set up my first rig... However I have a problem.

My Setup:
   - MSI Z170A SLI Plus motherboard
   - Intel Pentium Skylake 3.3Ghz G4400 CPU
   - 4x EVGA GeForce Nvidia GTX 1070 FTW
   - EVGA 1600w Platinum PSU
   - Windows 10 Home 64 Bit
   - 120G OCZ Vertex SSD
   - 2x 4Gb Corsair Vengeance LPX DDR4 2666MHz Memory
   - Claymore Dual Miner (Single Mode)

This produces 114 MH/s on ETH using Claymore.

My problem is that I can only get 4 GPU running, if I add more, I simply get a Code 12 in windows. I have tried Ubuntu, Centos, Win 7 and Win 10 with the same issues basically.

What I would like to know is, which Motherboard and processor combination will allow me to run 6 GPU as will replace what  I have just built.

I have tried G4 enabled and set to Gen 1, 2 and 3 and auto, I've disabled absolutely everything possible inc USB ports, lpt and parallel etc etc, seriously I am having a big a melt down here.
I've tried increasing the latency all the way in stages to 248 and still no joy.

I understand the processor is probably ok, its the motherboard which is causing the issue, and some people have said use the MSI Z170 Gaming M5 motherboard.

Can anyone help me please. I really want to replace the motherboard, reinstall and run 6, if I can, then I will go out and buy a load more.

Thank you for any help.

[tomduk]

Has anyone got any ideas on this? Still looking for a resolution to this issue.

[rthrz]

Im using  the Z170A M5 without problems 7 GPU.
Your motherboard shouldnt have any probem, did you install windows in UEFI mode?, did you disable Windows 7 instalation and enabled Windows 8 + in the BIOS?

[tomduk]

Yes it's in UEFI, tried everything and getting knowere.

People with the M5 claim to not have issues so maybe that's what I need, do you know if it's actually any different?

[tomduk]

Ive just checked the bios and yes UEFI and windows 8 enabled, 7 disabled.