I'm running the linux version on Ubuntu 16.04 with latest AMD drivers and 10x RX580 cards. Motherboard is ASROCK H110 ProBTC+ and I've got 4gb of RAM.
Dial back your memory clocks. Cryptonote is more memory sensitive than Ethereum, it’s more memory dependent and less on the core - that’s where I’d start anyway. 10 cards in one rig seems like asking for trouble anyway! Failing that can you not mine Ethereum (if that works) and exchange it to whatever it was you do want?
There's nothing troublesome about 10 cards in one rig, I normally stick 12. My 12gpus mixed rigs on dual eth are all fine. AMD + Nvidia are a tiny bit less stable (may do occasional reboot in a few days)
I’m not criticising you, just most rigs are 6 cards and there obviously is trouble as you’ve just said there was! If it’s fine in Ethereum but not in Cryptonote, I would still look at the memory clocks or possibly the risers if a problem occurs.