Think I'm tapped out at 1.4v
1.2v is default
https://www.raspberrypi.org/wp-conte...sue2.2_027.pdf
I didn't really plan on going subzero today. Just threw a little eraser around the arm cpu and went for it. 3 hours later started to get condensation issues. Next time I'll do a proper insulation job so hopefully it won't be an issue.