The default vCore has "2 states" in a sense. What I've noticed is that sometimes it reads 1.475 (which is the vCore it'll use when it's automatically OCing the cores for single threaded tasks). The other one you'll see is when all cores are fairly equally loaded. To set both (at least with the F3L bios I'm using) I have to crash the OC so that motherboards crash free bios kicks in. It's kinda strange.