Dual GPUs on x570

I wanted to upgrade my cpu to a ryzen 3700x. I am using 2 gpus, one for my host and one for my win10 vm.
After some looking around if the immou groups are any good i found the following reddit thread:
https://www.reddit.com/r/AMDHelp/comments/cc7dpt/x570ryzen_3900_and_dual_gpus/ .

Does anyone else have this issue / Does anyone know if this only affects msi mainboards?