This cable adapter allows simultaneous connection of up to four 3-pin fans to single PSU connector and gives a choice of fan operating speed by providing two standard (+12V) and two (+5V) connectors for reduced speed and noise level. A simple way of increasing the number of fan connections and providing control over fan speed, which can make hi-speed noisy fans significantly quieter. Attach the fans to the connector with yellow/black wires for +12V supply or with red /black wires for reduced speed +5V supply.