@irfs, I have the UD5H & 2 of those kits running at stock so I know they at least work ok on this board.

I'll have a quick play tonight & let you know if there's anything funky to be done to get them up to 2133 stable however I also have Ivy so maybe what I find won't be any help to you other than at least knowing 2 x 4GB of green run @2133.