6th GPU Keeps restarting RIG - Need Help

[dylan33]

Hi All!
Need you desperate help..

when plugging the 6th GPU to the RIG, windows keeps restarting when trying to detect the 6th GPU..
5 GPU is working with no problem.

All raisers seem to work.
i have 2 PSU - 850W-> Connected to 4 GPU + Mobo + 550W -> connected to 2 GPU.
windows 10 updated + GPU drivers are updated.
Virtual memory set to 20gb.
Bios Setting -> changed all PCIE to Gen1 + 4G Decoding
Audio disabled
Tried with 2 Mobo - Happens both on ASUS Z270-A Prime + Gigabype Z270 - D3.

GPU - 6 X AMD RX480 Shapphire Radeon 8gb ddr5

When unplugging the 6th GPU power -> let windows loads -> then connect the 6th GPU power -> I see in device manager : "This device cannot find enough free resources that it can use. (Code 12)" on the new connected GPU.

Any ideas ?? i tried everything and cannot find a solution.. need your desperate help guys 
Thanks! appreciate your thoughts..

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[savs]

1. Dont unplug and plug cards while the system is on
2. Remove some other card and connect the 6th card. Run the miner and if it last no more then 2 hours then the riser of your 6th card is broken.

[dylan33]

any combination of 5 GPU is working perfect..

whenever i plug the 6th.. windows is restarting on startup..

[dylan33]

i have downgraded the driver to 16.11.5 and now windows does not crash and all GPU's are working.

however when lunching claymore miner , windows crash and restarts..

any ideas ?

[savs]

Did you try to disconnect one of the GPUs witch is connected to 850 PSU and to try with 3 GPU on 850 PSU and 2 on 550 PSU. If it continue to restart the problem is in the small PSU

[soulmachine]

What's the wattage of you PSU? I think the reason is that your PSU has insufficient power because I had the same issue 3 weeks ago.

[Yenihan]

Try with driver version 17.6.2