Question CPUID hardware monitor ----- voltages ?

Depends on the system in question.

It was typical for Intel 14nm chips to have a Voltage Input of about 2 volts, yes. Then the internal VRMs of the CPU itself handle the rapid switching from .8-1.4 volts for C-States. Not sure on FX, Ryzen, or 10nm Intel chips what is typical.

Without knowing what Vin4 represents, can't say.