Actually, 70C is fine, let me explain why you're wrong

What low temp, 70C max CPUs are you finding? Modern CPUs rarely even start to throttle until they are well past that. 105C is usually when you know something is fucked, because it should have already throttled down to prevent that. 70C is a decent place for a modern CPU to sit with a decent cooler under normal circumstances, but it's nowhere near their max.