Kit contents: 4 custom fans (built-in SSC smart chip), 2 fan link cables, fan fixing assembly and screws. 1.Noise reduction ability: The original machine has 10 small high-speed fans, the noise is 80 decibels+, the sound is harsh, and it is not suitable for running at home. 2. Reduced power consumption: The original machine 10 small high-speed fan * 12 volts * 0.48 amp = 57.6w, modified 4 large airflow fan a total of 28.8w, theoretical minimum energy saving 28.8w, equivalent to the power consumption of a x4 chip. 3. Installation: This kit is very easy to install, just remove the top cover and place the system fan to install, no need to make the rest of the adjustment, the kit is plug and play. At the same time, the removal of this kit can also Simply restore the original state of the machine. 4. Please note that after installing this kit, the top cover of the machine cannot be put back on during use.