Interesting thing about the vDimm. The UP4 is okay but I already killed one of them and the memory OC is a pain in the ass. On both boards I could not manage to get 2600 stable. ~2500 is maximum here. Tested with BBSE, PSC, Samsung and of course different CPUs but no change so I'm quite sure it's board related. I just have no clue at all what is limiting.