Originally Posted by wingman99
With ASUS you can use IA AC/DC load line= 0.01 or negative offset to lower the core voltage. Best to use IA AC/DC load line so the off idle voltage will not be reduced with offset.
Just did some testing with this actually.
Not with AC=0.01 mOhms, but with 1.6 mOhms (intel max specification)
With full auto voltages (no offsets) and AC 160, DC 160 (1.6 mOhms), 5 ghz core and 4.7. ghz cache, and Loadline Calibration set to Standard (default/Normal), the CPU's default idle VID was 1.404v in bios and windows. The VR VOUT matched the VID by 5mv.
Running small FFT AVX prime95 dropped both the VID and VR VOUT down to 1.245v, pulling a nice uncoolable 185 (!) amps, and temps reached 100C in 25 seconds (no crash) so I ended the test. Looks like the AC loadline handled "vdroop countering" by boosting the VID, to keep enough voltage to run 5 ghz in "Intel's hot specs", without dealing with the transient response/spikes/voltage regulation issues from using Loadline Calibration.
(protip: never, ever use auto voltages without offsets, with ACLL=1.6 mOhms and Turbo loadline calibration, ever. Do that and you will be looking at 1.5v+ in windows. A high AC loadline and a high LLC should never be used simultaneously (except on manual vcore, which ignores the AC loadline value).
Nice experiment, but went back to 1.285v manual, LLC Turbo. Something rubs me the wrong way about seeing 1.4v VR VOUT at idle.