Originally Posted by Padinn
If I'm running AC and DC loadlines at 1, do I risk high transient overshoots? I have a -.05 offset
If VRM loadline calibration is left at standard/Normal (1.6 mOhms) or Low (I'm going to guess that Gigabyte's Low is 1.3 mOhms and medium is 1.0 mOhms), then I'm guessing no, but I'm talking out of my butthole here.
Transient risks come from VRM loadline being at low mOhms, not AC loadline. But I still don't know precisely how AC loadline works, except the more mOhms on it (default is 1.6 for 8 cores, 2.1 mohms for 4 and 6 core CFL, 1.8 mOhms for Kaby Lake), the higher the VID will be boosted from a base VID, then that VID is sent to the VRM (before DC loadline changes the VID from there). AC loadline does not control "Vcore" vdroop--VRM loadline does.
However, Padinn, this is still a very good question--whether HIGHER values for AC loadline have any risks of spikes compared to lower values (as long as VRM loadline is left at standard)...It would take an oscilloscope to answer this question. And of course, no one here seems to have access to one.
It will just lower the base VID from the defaults. But you would usually need a positive voltage offset to compensate.
Note that I have currently seen NO benefit (yet) of lowering DC loadline to 1, versus leaving it at 160 (1.6 mOhms).
If you do lower AC loadline to 1 (0.01 mOhms, for those with Asus boards), try keeping DC loadline at 1.6 mOhms and see if VID and VR VOUT (Vcore on Maximus XI boards) still lines up if not using any offsets (this won't work at all on manual vcore of course).