Can you help me please. I have 4x Rx580 and 1x Rx5700, and amd driver randomly crashed. In log i can see hashrate of rx5700 jump high 469mh, and drop to 0mh.
The same thing happens on 20.9.1 and 20.11.2 version driver. I revert default clock for rx5700 and problem it happens again.
Do you have advice how to solve this problem.
i use 5.4c Phoenix miner.
I had the same problem and it looked to me that as times passes the number of crashes went up. Up to a point where it would crash 2-4 times per day. I updated to driver 20.12.1 and phoenixminer 5.4.c and now its been running for 10 days without any crash (i hope i didnt jinx it now).
Maybe updating to 5.5.b will help you as it uses new kernels. Definately worth a try to update everything

I hope it helps you too!