i also experience gpu0 with 0 hashrate after few minutes of having like 600+ hash.
gpu 0 hangs in opencl call exit
then miner will restart again. only restarting pc will make the gpu0 mine again with 600+ hashrate and will repeat same error.
Try with -nofee 1, it's due to nicehash devfee mining, Hope it will be fixed soon...
After use -nofee 1, rig worked about 2 hours with no Incorrect shares. But sudenly Killed and Clamores restarted itself.
I also use option -h 0. My clocks for Gigabyte 480 8GB Samsung are 1145/2000.
XMR: 12/11/17-22:20:41 - SHARE FOUND - (GPU 2)
Share accepted (74 ms)!
XMR: 12/11/17-22:20:44 - New job from etn.crypto-coins.club:21020 (FAILOVER 2)
XMR - Total Speed: 4966 H/s, Total Shares: 473, Rejected: 0, Time: 02:05
XMR: GPU0 831 H/s, GPU1 805 H/s, GPU2 833 H/s, GPU3 833 H/s, GPU4 831 H/s, GPU5 833 H/s
XMR: Stale share found - skip
XMR: Stale share found - skip
XMR: 12/11/17-22:20:48 - SHARE FOUND - (GPU 4)
XMR: 12/11/17-22:20:48 - SHARE FOUND - (GPU 5)
Share accepted (2 ms)!
Share accepted (39 ms)!
XMR: 12/11/17-22:20:49 - SHARE FOUND - (GPU 3)
XMR: 12/11/17-22:20:49 - SHARE FOUND - (GPU 3)
Share accepted (73 ms)!
Share accepted (109 ms)!
XMR: 12/11/17-22:20:54 - SHARE FOUND - (GPU 3)
Share accepted (79 ms)!
Killed