Heh, I'm on my tablet (Nexus - you haven't reduced me to drugs).
Yes, you can just uncheck - but what i think we'll do is drop the clock to 4.2GHz and set the core voltage to 1.25v and have a play...
Your chip will easily do 4.3Ghz - but i think we should pay with 4.2 first as that will usually run on low vCore. I'm looking at your temps on stock and comparing the voltages you gave me...