I have a i5 6600k CPU. This morning when I woke up, I turn on my computer and then notice my fan is very loud. So I open my Corsair Link and saw that CPU temperature is high around 80 Celsius with a low load at around 15%. I cleaned any visible dust but the temperature is still high. So i went to buy thermal paste to replace. When I came home, I turned on my computer, and strangely, CPU was at 30 Celsius and my fan run quietly. Just when I thought everything is fine, 3 hours later, CPU temperature suddenly went up to 80 Celsius again. Although right now it is around 70 Celsius, one thing is the same, fan speed constantly within at 2586 - 2606RPM. It is the same as when I play FF15.