I have a rig running 4 x RX6800XT under PM 5.7b and it is ok but not yet perfect but acceptable for now much better than the week of downtime i had getting there. See my recent posts for the way to go to mine RX6000 series under Linux it doesnt appear to be a PM problem but but rather an opencl driver issue related to ROCM? and correct kernels to consider.

I am using Manjero at present but currently building a ubuntu image in the hopes of resolving stale share issue with better ROCM opencl drivers, but so far below is an example of performance under linux for these cards and I will say i like the RX6000 even if the prices are jacked up they run quiet with there massive heatsinks and even without fans on for periods very nice for primary indoor heating source so thats a massive saving on not having to turn the heating on thru winter and all is considered in the Return of investment calculation although i do mourn for my RVII as they where special.
Right now I put £35 a week electric in and get out £70 plus free heating. Bring on the depths of winter I am ready.



Eth: Mining ETH on eth-eu1.nanopool.org:9999 for 0:21
Eth speed: 254.515 MH/s, shares: 29/0/0, time: 0:21
GPUs: 1: 64.684 MH/s (5) 2: 64.597 MH/s (10) 3: 60.582 MH/s (7) 4: 64.652 MH/s (7)
Eth: Accepted shares 29 (10 stales), rejected shares 0 (0 stales)
Eth: Incorrect shares 0 (0.00%), est. stales percentage 34.48%
Eth: Maximum difficulty of found share: 2225.9 GH (!)
Eth: Average speed (5 min): 249.120 MH/s
Eth: Effective speed: 221.71 MH/s; at pool: 221.71 MH/s