I found it really easy to clock, much easier than messing around with IO/SA on Intel.
Set Vdimm that your sticks like (test on other platform maybe), make sure the CPU stays cool (so don't set like 1.5V+ vcore), active cooling on the RAM. With just this I was able to get 4200 12-11-11-10 1T gear 1 stable ? Maybe a small bump for Vsoc is necessary but that's chip-dependent.