Usually vdimm will be overvolted .5 - 7 volts for a given setting, so for example 3.1 = 3.17 real (go search for the dfi volt readout points so you can measure yours w/ dmm and know what it is for sure).
The new biosi allow the '+.3vdimm below 3.2' option below vdimm selection.
So if you're set @ 3.1 and enable the +.3, you usually end up w/ about 3.2 Vdimm. Turning that off and going to 3.2 will get the 3.27 probably.

I've been upping mine slowly (I limit myself to 3.3 Vdimm on general principle ) but I am up to 247 or 248 x 1.49vcore 3.2vdimm(?)(I fergit ).

Next time I reboot (over teh weekend) I will post my current settings here. (These gotta run OCCT w/ 900+ meg selected to test for 12+ hrs b4 I move on).

I got some wicked memtest results w/ TCCD and a venice on another machine so I GOTTA try on here and see if I can do it again!