EDIT:
I've visited several different o/c threads about this topic, some with pics. My setting options are different. I have [disabled]/follow Intel spec, [enabled]/load-line voltage increased, and [Auto]/no explanation.
I've noticed this setting in the latest F6 BIOS but there is nothing in the original manual to explain its usage or settings. I believe this is new to the F6 BIOS or I'm looking in the wrong part of the manual. Could someone please explain? I am currently running stable at 4.5 GHz with 16 GB of G-Skill Sniper RAM at 1866 MHz X.M.P. profile. Thank you.