I've been using a Gigabyte GA-Z170MX-Gaming 5 since January, set the multiplier to 45 right out of the box with no voltage increase, and haven't had any issues (using a Arctic Liquid Freezer 120 for cooling). 31C idle, 58C under load. Been curious about pushing it further, but I'm enjoying the stability/performance I've gotten so far. I second Swndlr, try small increments on the voltage, and keep an eye on those temps. Good luck with yours.