4 pin fan splitter cable connects 3 computer case fans to a single motherboard fan header; PWM splitter cable connects an additional fan to increase airflow in your computer case; Fan speed label on the 4 pin fan master connector of the fan header splitter is wired to receive the PWM control signal and share it to the slave fans
Black sleeved nylon braided cable, more concise and durable
CPU fan extension:This cost-effective of 4 pin fan splitter cables provide the more spare cable for adding fans to increase cooling in your computer case to ensure the operational speed of CPU.
CPU fan splitter has a 4 pin fan connector a wire that sends the RPM signal to the motherboard connector for synchronizing the fan speed with the other 2 fans; 3 pin fan splitter omits the RPM signal pin for tandem fan speeds with all 3 fans when supported by your computer and fans