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, & the large diameter reduces noise even when youre pushing your system hard.