I also have the same issue but after reapplied few times the overclock setting it works..keep trying setting each card with individual clock setting
Thanks for answering, I can try but i don't think that's a proper solution since it happens with multiple GPUs in same rig. Usualy clocks are set bad after reboot, next I have to reload miner, clocks are fine but after a while they are starting to lower clock settings.Look at those examples:
ETH - Total Speed: 360.276 Mh/s, Total Shares: 20, Rejected: 0, Time: 00:09
ETH: GPU0
26.656 Mh/s, GPU1
26.666 Mh/s, GPU2 30.689 Mh/s, GPU3 30.672 Mh/s, GPU4 30.594 Mh/s, GPU5 30.826 Mh/s, GPU6 30.629 Mh/s, GPU7 30.442 Mh/s, GPU8 30.745 Mh/s, GPU9 30.802 Mh/s, GPU10 30.754 Mh/s, GPU11 30.802 Mh/s
ETH - Total Speed: 363.554 Mh/s, Total Shares: 1280, Rejected: 0, Time: 09:52
ETH: GPU0
26.617 Mh/s, GPU1
26.635 Mh/s, GPU2 30.792 Mh/s, GPU3 31.130 Mh/s, GPU4 30.638 Mh/s, GPU5 31.160 Mh/s, GPU6 31.118 Mh/s, GPU7 30.946 Mh/s, GPU8 31.180 Mh/s, GPU9 31.155 Mh/s, GPU10 31.000 Mh/s, GPU11 31.184 Mh/s
Sometimes almost all of them are in default setting or lower than I desire.
If you attached a monitor on GPU0, will that fix the problem?
I have a few older rigs with RX480 Reference, with first 2 GPUs (6xRX480) always acting up.
Solution was to use a dummy HDMI adapter, and problem went away.