pwm: ISL69138 6+1 phase “digital pwm” this is intersils first fully digital pwm.
6 phases are being doubled to 12 for Vcore using ISL6617 doublers.
The +1 phase is used for Vccsa or Vccio for the Kabylake-X cpu´s only!
This is because Kabylake-X cpu´s dont have a FIVR,
so they need external voltage input rails for vccsa (system agent) and vccio (qpi/vtt) from the motherboard.
The Skylake-X cpu´s have a FIVR which means that all the additional,
input voltages are on the cpu itself.
I hope this makes it a bit more understandable @wendell .
powerstages: ISL99227B 60A Smart powerstage.
chokes: 60A probablly.
caps: 12K
Memory vrm:
pwm: 2x ISL69138 providing 2 phases each for each set of 4 dimm slots.
mosfets: Sinopower SM7341EH Dual-N fets.
This particular vrm is pretty special, because its the first all ISL implementation,
that i have seen used on a motherboard.
And spec wise it looks very nice sofar.