. CX Series™ Modular power supply units are an excellent choice for basic system builds & desktop PC computer upgrades offering high reliability low noise & easy installation. The flexible modular cabling system lets you use only the cables you need & 80 PLUS Bronze certified efficiency means less excess heat lower noise & lower power bills. The large-diameter thermally controlled fan makes the CX Series Modular quieter at idle & reduces noise even when youre pushing your system hard. The matte black finish black-sleeved cables & black connectors help give your system a restrained high-tech look..