I have 3 similar rigs:
Asrock H81 PRO BTC
6x Sapphire RX 480 Nitro+ 4GB
2x PSU 830W
2x 4GB DDR3 1600Mhz
6x Powered Raisers
Ubuntu 16.04 with AMDGPU-Pro 16.40
Mining starts fine, without errors. But after some time(about 30minuts - 2h) Several GPU stops mining.
And I can't just stop & run miner, I have to reboot my system to bring them up.
I have tried to switch Risers, Mobo, different miners, tweaking fans and so one... But problem still persists. Maybe someone have faced similar problem and have solution to fix it? Or have clues of root cause?
Thanks in advance