Windows Errors with 6th GPU. Help.

[Vanila]

  Hello everybody. Finaly i recieved my 6-th gpu for full rig and i encountered very strange problem that i never saw before anywehere. I have z170 gaming aura, i7 6700k, 16gb ram, ssd samsun Evo and HDD Sata. 4 gpus are 1070 and 2 are 1080. System and 2 1080 are connected to 1 750Watt Corsair and other 4(3) cards to 850watt Corsair. 1 of gpus (msi 1080) is on the motherboard slot (for work stuff and games).

When i try to run the system with all 6 cards ,at the end of the loading of my desktop - 1080 is like disconnecting and i have a black screen.
I tried to reset it couple times and after that i have a windows Error 0xc0000225.

When i unplug 6th card back to 5. Its working as it was...

Also after these "hard tryings" my zec miner 0.3.4b stoped to run. It just dont start at all. At the moment im using nicehash but i woud be glad to fix my zec miner too...

If you have any other questions about the problem i will respond you immediately!

Thanks to everyone who can give some advice to fix this problem! I really apreciate any kind of help!

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[papampi]

Have you updated the bios to latest ?
Enabled above 4g/minig mode in bios ?
Disabled HD audio in bios ?
Does the windows installed with uefi and not legacy ?

[Vanila]

1) The version of bios is the last one
2) I updated bios exactly for 4g function and yes- it is on
3) No, never tried it before. I use 1 gpu for personal things like movies games and work so i also use headphones. Will this funciont take off all the sound or it doesnt matter?
4)I have UEFI bios by standard. Didnt reinstalled windows yet. Its official windows 10 (updated couple days ago).

[coinnoob_za]

That error relates to your Boot device missing, so the 6th Card somehow interferes with your Boot Device.
Are you using a SSD to boot or an M.2 Drive? On some boards an M.2 Drive can disable a PCI-e lane!
Sounds like a hardware conflict.

Disable whatever unecessary devices not used in BIOS. Com ports/Sound/Onboard Graphics etc.

[Vanila]

Yes, im using SSD as a boot device.

Can you give me some instructions about disabling ports? Im not so good at using BIOS but if you tell  which ones to desable i can  try. (As i written before i use headphones, will it be desabled if i disable sound port? or it is only for sound dedicated cards? (I use only motherboards standard green input for sound).

[brownfly]

I also use z170 and had to switch PCIe config in BIOS before using all 6 GPUs to "Gen1" mode, otherwise it did not work at all.

[Vanila]

Can you explain me please what does that Gen 1 mode?