Hello,

Mining freshman here, first of all thank you Tytanick. Your software is phenomenal.

Second, I am having some trouble. Here is my setup. I have four rigs. All identical, all with the same problem.

MSI z170a pro gaming carbon
Intel Pentium Processor
Kingston 4gb Ram
1000 Corsair PSU
6 Sapphire Nitro RX480 4gb (Mixture of Elpida, Hynix and Samsung)
6 of Mintcells Blue Powered USB Risers.
Modified 4U server case

When I plug in 5 GPUs they work great on both windows and simplemining. However when I plug in the 6th GPU a random GPU will give a "WATCHDOG: GPU # hangs in OpenCL call, exit." And restart the rig. Sometimes the rig will last 60-72 hours and sometimes barely make it 30 seconds before rebooting. (-r 1 is set up)

To be clear. They are bone stock. No overclocking. Any 5 of the 6 will work perfectly as 5.

Here is what I have tried but to no avail.

Replaced the GPU. (Then a different one stopped working, did this with four working GPUs.)
Replaced the motherboard
Swapped out one, then two, then ALL the risers.
Changed the setup from a 1000w PSU to a Corsair 1200W PSU
Changed the processor from Pentium to i3
Updated to the latest Z170a bios from MSI
Downgraded from the latest bios to an earlier Z170a bios
Test -gesr 2 from Claymore and -eser.
Gave the errant GPUs a little higher power stage.
Lowered the Powerstage to ease off the PSU.

I assume that I am looking at the problem in the face but I'm too ignorant to notice it.

Any help would be greatly appreciated!

Thank you,