I see where is your problem
if the cards are modded you have to use the blockchain driver, not the last one
That's just a total BS - stop trolling the guy. Don't use blockchain driver - it's buggy. Use one of the recent drivers (it's never a good idea to use THE most recent one).
But that's really funny that @Hoemas has RX570 and gpu-z shows RX 580. Was it the same before modding bios and patching? I wonder if it's the driver patcher glitch Two things I could think of regarding low hash rate (given that compute mode is "on"): 1. Not enough power, 2. you screwed up during bios mod. Flash the original bios back and start from there.... see if the cards behave as they should
I'm not trolling here anyone...
is how I am setting up my GPUs - AMD ofcourse
If they are bios modded (pached and so on) I am using the blockchain driver
If they are stock bios, than through the AMD global settings I put them one by one in the "compute mode" and use the last stable driver
and have no problem at all
maybe can be a virtual memory issue, this could be also a questionmark