@Glanza : that's one specific monoblock with one specific board. Doesn't even say
which monoblock, but since 8 Pack got involved I'd say it was the EK one since OcUK do a bundle.
There is no way VRMs left under their heatsink with ambient air could perform better than having a water-cooled coldplate directly attached to them IF the monoblock was working properly. Do we see the same issue when using Bitspower's Rampage VI Extreme monoblock? 8 Pack knows his stuff, but he's not infallible.
Did he test every RVIE in stock with every EK monoblock in stock? Did he see the same issues? Why then have EK not made a revision if their monoblock is evidently sub-par? What about other top-tier X299 motherboards and their monoblocks? Do they also have the same issue?
I'd pass this off as a specific case, not remotely representative of the board, the chipset or the monoblock.