I have my 10900k at 1.4v LLC4 on a Z490 godlike for daily use. 1.4v is nothing at idle for 14nm Intel chips if you allow enough VDroop—by the time a heavy load hits, you’ll be under 1.2v. Remember—high droop and high idle voltage is safer then low droop at lower idle voltage because you won’t see 1.5-1.6v spikes that may be undetectable but will quickly degrade your chip (a flat load line curve is rarely a good idea, especially for daily use!). Also, Max out your VRM switching frequency so the VRM can respond quicker to changes in load.
Buildzoid has used an oscilloscope to measure transients on a number of different boards across brands to find sweet spots for LLC values (balance of spike/droop, load/idle voltages, and stability), worth watching some to get an idea of these trends.