I wonder how the Voltage Regulation is actually made, and, especially how the A, V, P is actually measured (in detail) with those CPUs..
The bloggers shoot tons of information on those CPU's power consumption in Ampers (like 1-350A range), voltages (like 0.03 to 1.6V range), and powers (like 1-300W range).
Imagine, say, a 50-100mVpp noise ripple, an 8bit ADCs perhaps - how they know what is the actual voltage, current and power the CPU is getting?? Especially when the CPUs changes their power consumption in microseconds??
Would be great to know more on how the stuff works there..
PS: the latest Intel message is there is a bug in their gen13 and gen14 CPU's microcode doing the power regulation (the set voltage is higher than actually required and measured), they prepare a fix (in coop with the mobo vendors).
My current understanding is the CPUs (the latest) do include the complete X-phase voltage regulation control circuitry on their chip(s), like they PWM the power mosfets (off the chip) and they measure the voltage and perhaps current by themself (integrated ADCs?)..