Exceptional Quiet, Superior Features Pure Power 11 FM 550W offers peerless dependability and best-in-class features such as modular cable management. Whether you are assembling a very quiet system, upgrading your PC, or building a gaming system with a powerful high-end GPU: Pure Power 11 FM 550W offers the best combination of features at a very popular price. 80 PLUS® Gold efficiency (up to 93.5 ) Modular cables for maximum build flexibility Two strong 12V-rails Silence-optimized 120mm be quiet! fan Advanced stability and voltage regulation thanks to LLC, SR and DC-to-DC Full suite of top safety features Five-year manufacturer’s warranty 80 Plus® Gold Certification Pure Power 11 FM 550W is certified 80 PLUS Gold with an efficiency rating of up to 93.5 – a truly outstanding level for this class of PSU. The most compelling benefit: lower power consumption and consequently lower costs, and cooler, quieter operation.     Modular Cables Thanks to the modular cables, all cables that serve no purpose in the system are left out. For this reason, systems always appear very tidy. At the same time installation is performed much more conveniently. A smoother airflow results from the uncluttered layout of the system, which means lower noise and temperatures prevail inside the case.   Power And Compatibility for your system Pure Power 11 FM offers 550W of continuous power with two independent 12V rails for signal stability and two PCI express connectors to support powerful graphics cards. Whether you are building a very quiet system or gaming system: Pure Power 11 FM 550W is always the correct choice!   Exceptionally Silent Operation   The silence-optimized 120mm be quiet! fan is thermally governed to strike the best balance between effective cooling and quietness. Airflow-optimized fan blades reduce turbulence, enabling best-in-class quiet functionality and the almost inaudible operation that be quiet! is famous for. High-Class Technologies   The use of LLC and Synchronous Rectifier (SR) provides very stable operation and enhanced voltage regulation. The PSU is equipped with DC-to-DC conversion for tight voltage regulation even under heavy cross-loading conditions. This ensures reliable operation with the next generation of processors and graphics cards. Specification Form Factor: ATX Modular: Fully Modular Series: Be Quiet! Pure Power 11 Compatability: ATX 12V 2.4 & EPS 12V 2.92 Wattage: 550 W Connectors: 1 x ATX-Motherboard (20 4-pin) 1 x P4 4 (CPU) 2 x PCI-e 6 2-pin (GPU) 2 x PATA 9 x SATA 1 x FDD (Floppy) Rail Design: Dual 12V AC Input: AC 100-240 V PFC: Active PFC Fan Type: 120mm Silence-optimized be quiet! fan Fan Bearin Rifle Bearing Noise: dB(A) at 20 load: 8.8 dB(A) at 50 load: 9 dB(A) at 100 load: 18.1 80 Certification: 80 Gold Efficiency: \"230V, 20 load: 89.8 230V, 50 load: 93.5 230V, 100 load: 92 \" MTBF: \"100,000 hours\" Protection: Over current Over voltage Under voltage Short circuit Over temperature Over power Features: See Overview Package Contents: PSU Screws Cable ties Manual Weight/Dimensions: 1.45 kg 160 x 150 x 86 mm Package Weight: 1.4500 kg Warranty: 5 Years