The voltages explained/discussed in many places, including
here and
here and
here (and that's just the top three google hits which looked relevant).
Motherboard VRM implementation (detailed
here and
here and
here) on CH6/X370 mobos uses exactly the same component hardware as on M8/Z170 mobos. The power phases should be able to handle ~320A on CPU and ~160A on SOC (plus main chipset) and ~34A on DDR4 MCU, at >90% power efficiency up to 125C. With very high (several hundred KHz) PWM/switching frequencies and overrated bulk filter reservoirs, it looks like it should be able to respond to (mV resolution) load line transients within a couple of milliseconds.
Ryzen processor voltage monitoring is briefly outlined
here:
AMD's opting out of FIVR, the fully-integrated voltage regulator that Intel has recently used. Instead, AMD is option for a more traditional linear voltage regulator and LDO (low-dropout regulator), and is localizing voltage regulations across the core. Continuing its newfound obsession with sensors (for the record, we think this is a good thing), AMD has 9 vDroop detectors alongside 48 power supply monitors that help ensure stable and fine-tuned voltage regulation. When asked the benefit of LDOs, we were told that an LDO allows for faster cores to operated with lower voltage, thus saving power (and heat).
(etc)
So I'm not seeing much real value in firmware-level LLC controls. They wouldn't be as responsive as motherboard VRM hardware or processor power regulation sensors/cutouts ... firmware is fast and powerful, but it just seems too sluggish and laggy for useful realtime voltage regulation on a GHz processor, I'd think it's mainly useful only as another redundancy to fall back onto during fault conditions or for truly extreme out of spec operation (like crazy LN2 OC record attempts, because CH6 mobos are already overengineered for "normal" overclock/overspec operation).
Of course I might be wrong. Do (reasonable values for) these LLC BIOS settings really appear to make measurable differences in performance or stability?
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[/Korth]