I had my better half aka "The Dragon" Swap the GPU connections to the PCI-slots.  So I know in fact now that there is 1 of the GPU's that got trouble.
I used atiflash in ethOS to mod the BIOS.  The Bios is working great on all the other cards. Hashing 30+ mh/s.

Cards are Sapphire Nitro+ OC RX570 4gb elphida

Anyhow. The rig, while running on Windows, ran without any problems for 1,5 month. The trouble just happened out of nothing.  Thread stuck in device. Blue screen.. A pain in the A**. That is why I switched to ethOS.  Also I could not run more than 3 cards with modded BIOS without the bluescreens... On the best i ran 3 GPUs on 29 and 3 on 25..


The Windows "project" took so much time with the reebots, blue screens and everything.. Ethos was set up in "no time" compared to windows

So I have an Idea. The BIOS switch on the GPU, what do that do?  Does it use another memory on the GPU?   Can I install the modded BIOS on the switched side and remove the problem? Is this possible?

Or If i lower the mem from 2070 to lets say 1950, would this lower the hashrate?