hi guys,
asrock Z370 pro 4 here.

I want to undervolt my i7 8700k until i upgrade to beefier cooler:
I set CPU Vcore Voltage to offset with a -90mV.
however, when i run cinebench, the used vcore voltage is the same as without -90 offset. while i do notice the vcore min drops by -90mV, less so for max vcore and vcore value when doing cinebench.

is this the proper way to undervolt by offset?
I read on forum that need to set IA AC/DC loadline to 0.01, but cant seems to find that option in asrock bios (?)