I’m now attempting this, and not having any luck. Here’s my history: I was mining on a pair of Radeon R9 390 flawlessly, and am now trying to add a couple 6800XTs. I was running the latest stable version of HiveOS (before I had seen this post). When I booted up the rig, the new cards were visible on startup, but the temperature, fan speed, and wattage readouts were not there - the R9 390 was there and did show the data. Phoenix miner only showed one GPU (the R9 390), and if I ran the amd-info command, only one GPU was listed.
Since seeing this post, I did an in-place ‘upgrade’ to the suggested alpha version here and rebooted the rig. I immediately noticed a difference: on startup, the 6800XTs showed the temperature, fan speed and wattage, so I thought I had success. Upon checking Phoenix miner, it did now detect the three GPUs, but the hash rates for the 6800XTs are zero, and Phoenix miner keeps restarting to try to get them going.
So, I wiped the drive and used Etcher to re-flash the drive with the alpha image. I booted that image with the same result - 6800XTs are detected, but hash-rate is zero.
Here’s my setup: Asus B550-Plus motherboard, Ryzen 5 2400G processor, 8GB DDR4 (I tried upgrading to 16GB once per the previous post, but that didn’t help).