Hello MartinW,

I am an owner of An AmigaOne X5000/20. It was sold with a graphic card radeon rx 240. I was not able to boot morphos due to the lack of drivers and support for this graphic card. So I have bought a graphic card radeon hd5450, then I have removed the other graphic card frome the pci-e 16x slot and I have plugged the new one in it. And that works. So I would suggest you to do the same thing, removing the radeon rx550 from the pcie 16x slot and plugging your radeon hd5450 in it.

Tell us if that works.

Brumiga