RVN Mining breaks

Hey

I mine exclusively Ravencoin and I'm curious on how much of a break you guys give your GPU's?

I mine on 5 different gaming computers so I give each one a break for 1hr each from 2-7PM, curious if anyone else does or I'm just being too cautious.

I chose this time as it's "peak" power usage (though my power company does NOT have a time of day rate plan for the foreseeable future I may save on fuel adj?)