. CX Series Modular power supply units are an ideal choice for basic system builds and desktop PC computer upgrades offering high reliability low noise and the flexibility of modular cabling.80 plus bronze certified efficiency and clever fan design allow for little or no detectable fan noise during regular operation. The matte black finish black-sleeved cables and black connectors help give your system a restrained high-tech look.Since the peripheral power cables aren't hard-wired to the power supply you can connect only the cables you need for your exact configuration of PCI-E cards and storage devices. Once you've installed a PSU you shouldn't have to think about it. Employing a thermally controlled fan makes the CX Series Modular quieter at idle and the large diameter reduces noise even when you're pushing your system hard..