6 GPU rig AsRock Z97 Extreme 6 Windows 10

[Miner1eb]

So here is my current set up:
Windows 10 64bit
AsRock Z97 Extreme6
Intel Celeron G1840 2.8GHZ
6x XFX Radeon RX 480 8GB (however I can only get 5 to work at this time)
Kingston 120GB SSD
Hyperx Fury 8GB DDR3
HP 1200W PSU dedicated for GPUs
Evga 1000W PSU dedicated to mobo,etc.

Has anybody successfully gotten all 6 GPUs to be recognized? I have all 5 PCIe slots working flawlessly. My issue is with the mini PCIe slot that I have a Mini PCIe to PCIe 1x adapter to 16x USB 3.0 riser. During the build and testing, this setup(Mini PCIe) worked fine and produced video through HDMI so I KNOW it works. Do I have a power problem or is this a Windows 10 issue? Any help or advice would be much appreciated. Thanks for your time and suggestions in advance!

[Miner1eb]

Surely someone here has to have some advice!?!

[Miner1eb]

****BUMP****

I still have the same issue. Anyone?!?!?

[evakka]

Most of the times it's the risers fault

I guess the risers are powered, correct?
Try changing risers/GPUs to check them,
Also remove all of the GPUs and boot with one at a time

[Miner1eb]

Most of the times it's the risers fault

I guess the risers are powered, correct?
Try changing risers/GPUs to check them,
Also remove all of the GPUs and boot with one at a time

Thank you evakka for the reply! Finally someone is willing to engage in the solution! I am grateful for your troubleshoot at the solution but, I have already sequenced all GPUS through all risers and in turn through all 1x, 16x & mini PCIe slots. They all work perfectly solo, as one would expect. The issue I believe is that my mini PCIe shares the same lane with my PCIe 1x lane 3. Any ideas on that? The only other thread I could find on this was from 2013-2014 here:https://bitcointalk.org/index.php?topic=391411.0 I truly believe this can and should work but I am overlooking a piece of the puzzle here!?!?!

[evakka]

Try booting your system with some other OS instead of windows to check if the same situation occurs.

You can use ETHOS or a very easy to use OS, simplemining.net
Do a search in the forum and u will find details on how to operate them

[fanatic26]

I had an issue on my H97 anniversary boards where I had to use a 16x to 16x riser to get the card in the 16x slot to show up. Powered or unpowered I couldnt get it working with the 1x adapter.

[Amph]

do you need to change something in the bios to get the gpu recognized? i can't get them to work with my extreme 4