Originally Posted by goncalossilva
As requested before, please do this for all LLC levels
There's no need to go through all of them. Not from my perspective, anyway.
If you're wondering what happens at level 5, here's a very crude (non-ideal) capture:
With an LLC of 5, if VID is set to 1.40V in UEFI (manual), you'll see load voltages in the ballpark of 1.45V. When releasing the load, the voltage will momentarily peak around 1.47V, before it returns to idle state. The overshoot duration is sub 50uS, but the CPU frequently sees 50~70mv more than what you've set. With "Voffset removed" the VRM has to substantially ramp the voltage when the load hits (will vary somewhat depending upon current), which puts more strain on the FETs. It's just more strenuous on the system to have to ramp voltage by ~50mv while dealing with a transient. How that may impact things down the road is always up in the air. You're playing with percentages/potential for failure, and what that means to you. Whether or not it will
happen is difficult to quantify.
If you have sympathy for electronics, you'd likely opt for LLC 1 or 2. At those levels, peak overshoot is constrained 10-20mV over the user-applied VID at durations that likely fall within the tolerance guidelines. Those levels are complimentary to the associated devices. From levels 3 and above, the actual voltage is ramped above the user-defined value, and we start seeing excursions of 30mV+ past the user-set value.