Completely correct. I can of course remove my primary card and try this card in the x16 slot just as a test but it doesn't really help much as I'd have to put it back again and it's not trivial to do what with the x4 to x16 riser cable and the bracket bodges to then make the card physically fit in the case.

Something I noticed is that OS4 incorrectly reports the card as a 5430. That is not correct and if MOS is doing the same then a 5430 is not on the supported hardware list. But maybe it's just a quirk of the various IDs of different AMD cards vs GPU chip used.

Here is the actual card. I primarily bought it as something low cost and silent for when I was testing Qemu GPU passthrough. Just a happy coincidence it was on the MOS supported list.

https://www.ebay.co.uk/itm/256055151868

[ Edited by MartinW 27.09.2023 - 12:31 ]