The heat dissipation problem of CPU fan is only one aspect, and there are other factors. First, the CPU voltage can be adjusted through the motherboard, especially the overclocked CPU voltage is generally higher than normal, so the temperature will be higher. If there is no overclocking, then the temperature of 55C may be that you ignored the silica gel. When cleaning the fan and radiator, if the fan is removed and reinstalled, it must be coated with a layer of silica gel. The function of silica gel is to conduct heat and let CPU and fan dissipate heat. Good contact. If silicone is also coated, it can only be said that the fan speed is not enough. AMD's CPU dissipates a lot of heat. I'm afraid it's not enough. Generally, it is around 2000 or even higher to meet the heat dissipation of COU. In addition, look at the power fan. If the heat dissipation there is not good, the internal temperature of the chassis will be high and the heat dissipation effect of CPU will become worse. Good luck.