> My X5000 setup is as follows
> 16X Slot I have a Radeon Rx 570 that I use for OS 4.1
> 1X slot with 16x adapter I use a Radeon 1950 with MorphOS
> 1X slot with 16x adapter I use a Radeon HD 6870 for linux

According to the first link in comment #3, "using 3 graphics cards in the X5000 won't work with MorphOS".