Never said full speed because I'm running 192 GB at 5200 MT/s :p. Just the ASUS Z790 creator, like I said though I'd look into W680 and some ECC instead had I not had a steal of a deal on the memory at the time. 5600 MT/s booted but wouldn't pass memory tests. I've heard others with the same setup needed to go to 4800. That just happens to still be faster than the max memory bandwidth of the quad channel platform that was referenced anyways. Part of it might be that the early 48 GB kits (mine included) were themselves only rated for 5600. I'd be willing to bet mine would work at 5600 with one of these new better rated ~6800 kits helping things a little.

I will say my experience with the memory controllers on modern Intel systems has been SIGNIFICANTLY better than my experience with them memory controllers on modern AMD systems. I could barely get my 7950X to do 64 GB at 6000, and that was one of the better experiences have had with the Zen memory controllers, but the Intel builds easily blow past that.