To increase voltage just do it at the left where you see the lighting bolt, then just increase the clock speed offset.
K boost won't increase my voltage, and i don't have a dual bios so i won't risk bricking my card. it's irritating that i seem to have the only 1080 that can't use 1.093v
I have yet to see a 1080 or 1070 that will volt past 1.063 on any of the manufacturers stock bios. Most limit it at 1.063 and it will fall back to 1.050. My EVGA 1080 FTW Hybrid is the exact same way. Peaks at 1.063 falls back to 1.050.
Mine hits 1.093v with ease. I can show a screenshot if you like. I use MSI Afterburner and MSI's Curve posted here: http://thepcenthusiast.com/how-to-overclock-your-geforce-gtx-1070/
As witchy posted: no balls no glory