tired_gamer

HI im having a problem with my motherboard recently and i am not able to solve it on my im sure its the same one with plx 1 its going over 70 degrees C and plx 2 and 3 or normal under 30 to 40 degrees and plx 1 is in red colour and 2 n 3 are in white so its plx1 1 that i know and its causing unexpected shutdown and its out of warrenty so its not going to get replaced i dont know what to do here this is what i have asus maximus vi formula 16 gb corsair vengeance intel i7 4770k nzxt kraken x60 help me