I have a very strange issue with the motherboard ASROCK H110 BTC PRO + and AMD GPU's


They basically appear red in the PCIE discovery part of the BIOS, 
I have tried RX580's and VEGA 56 and VEGA 64,  yet Nvidia cards work fine.

I have tried 3 different motherboards and ram and CPU and PSu's and risers,  all have the same result.


anybody know whats going on? is this a known issue?

The cards work on a different PC i have .