Resolve this yet?
all pcie slots set to "Gen1"? (including the 16x)?
I to run an Asrock board with Sapphire 8GB SE Micron and have odd issues. (even stock)
With the asrock h110 pro btc+ and Windows 10 (1703 or 1709), I can only mine if I have the Integrated GPU on. When I set to disabled, my RX580's lose "OpenCL" which is required to mine.
Currently have 8 of these identical GPU in the rig on Silent mode, and can only mine for approx 6 hours before the AMD driver crashes.
This might help your situation? See latest Beta Bios revision as of Feb 27
http://www.asrock.com/mb/Intel/H81%20Pro%20BTC%20R2.0/#BIOSno its not resolved, ive tried setting the slots to gen1 and I tried gen 2 which made no difference on the asrock h81 pro btc R2.0 mobo, also tried with and without the intergrated gpu still no difference, pretty sure why I cant run 6 is because of not enough juice for the 6th gpu. 5 run just fine no problems what so ever, even runs for months no issues
I believe I have the feb bios from asrock on the mobo already, about 95% sure lol and didn't make any difference lol