[vfio-users] Deciding whether to stick with X399

[Taiidan at gmx.com]

FYI the X58 is very old and Intel didn't really make a proper IOMMU for 
that generation of CPU's - no Interrupt Remapping and most boards lack 
IOMMU-GFX support so you can't attach a video card. Don't let it color 
your experience and future endeavors.

I would RMA your X399 board, assuming it has proper IOMMU groups and 
enough slots you can easily do multi seat.

While I do not have a Ryzen (I didn't want a system with ME/PSP) I play 
games in a VM on my KGPE-D16 and AMD Opteron 6274 "Bulldozer" setup so 
it does work with AMD stuff - for the end user the intel/v/amd IOMMU 
technical details don't really matter they both work fine.

They've solved the Ryzen IOMMU bugs just *make sure* you get a board 
where the vendor releases BIOS updates, properly implements IOMMU (most 
don't, which is why I bought my coreboot board) and doesn't make five 
different revisions of the same board with slightly different features 
and issues.