What is AUXTIN in CPUID Hardware Monitor ?
It is northbridge temperature.
Why your AUXTIN temperature so high ?
According to me AUXTIN is called presumably Aux T (@) In. It stands for Auxiliary Temperature input as same as auxiliary entrance temperature. And with it not closer to specified sensor temperature’s is called in these program. And, however, often mistaken is given in selection. The temp reading you have is not that much in concern, may be you blow a fan on the motherboard, which make temp down. Hope this might fix your problem.