CPU won't be any problem at all. Nvidia drivers can sometimes be buggy. I have a FreeBSD system with a 1080, and it took some fiddling to get the right combination of Nvidia drivers and DRM for it to work. Not a lot, but it wasn't just install...
What GPU is being used? Which version of GhostBSD is being used? Which CPU?
GhostBSD won't have any problems with the B550 chipset, but there are too many other variables at play to give any other direction.