Be Quiet! 650W Straight Power 11 PSU, Fully Modular, Fluid Dynamic Fan, SLI/XFire, 80 Gold World Class Quiet and Efficency     be quiet! Straight Power 11 650W raises the bar for systems that demand virtually inaudible operation without power quality compromises.     Virtually inaudible SilentWings® 3 135mm fan     Funnel-shaped fan opening of the PSU case for high airflow intake     Wire-free inside the PSU on the DC side for enhanced cooling and longevity      Full cable management for maximum build flexibility     80PLUS® Gold efficiency (up to 93 )     Powerful multi-GPU support with four PCI-Express connectors     Japanese 105°C-rated capacitors ensure stability and reliability     ErP and Energy Star 6.1 ready     5-year manufacturer’s warranty Silent Wings® 3 Fan   Provides virtually inaudible operation     The high-end SilentWings® 3 fan delivers best-of-class airflow yet produces very little noise. This is thanks to its unique, optimized fan blade design along with an advanced fluid-dynamic bearing and 6-pole fan motor that largely eliminates operational noise, has a super-long life and minimal power consumption. Funnel-Shaped Fan Opening   Higher cooling performance     The fan inlet of the Straight Power 11 650W is funnel-shaped. It causes an increased throughput of air which benefits to a higher cooling performance. Wire-Free Design Inside The PSU     Pushing the longevity of components to a maximum     An absolute innovation: The Straight Power 11 650W is wire-free on the DC side inside the PSU body. This results in improved cooling airflow and less signal disturbance, simply because of a lack of wiring, and ultimately pushes the lifetimes of the components to a maximum. Fully Modular Cable Management   Utmost convenience and compatibility     Thanks to the fully modular cable management, 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. 80PLUS® GOLD Certified   Impressively high efficiency     Straight Power 11 650W is certified with 80PLUS® Gold efficiency, reaching up to 93 . This gives less power consumption and a cooler and quieter operation. Truly a benefit for any system. High-Class Technologies   Compatibility for the systems of tomorrow     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. Japanese 105° Capacitors   A testament to high quality     Only the best components are used in Straight Power 11 650W. That is why we have built only high-quality Japanese capacitors into the PSU chassis. They are rated to 105°C, ensuring stability, reliability and a long operating life. Specification Form Factor: ATX Modular: Fully Modular Series: Be Quiet! Straight Power 11 Compatability: ATX 12V 2.4 & EPS 12V 2.92 Wattage: 650 W Connectors: \"1 x ATX-Motherboard (20 4-pin) 1 x P4 4 (CPU) 4 x PCI-E 6 2-pin (GPU) 3 x PATA 4 pin 9 x SATA 15-pin (HDD, Drives) 1 x FDD (Floppy) 3 x Mainboard connector (PATA 4-pin)\" Rail Design: Quad 12V AC Input: AC 100-240 V PFC: Active PFC Fan Type: SilentWings 3 fan (fluid-dynamic bearing) Fan Bearin Fluid / Hydraulic Bearing Noise: dB(A) at 20 load: 8.93 dB(A) at 50 load: 9.8 dB(A) at 100 load: 17.52 80 Certification: 80 Gold Efficiency: up to 93 MTBF: \"100,000 hours\" Protection: Over current Over voltage Under voltage Short circuit Over temperature Over power Weight/Dimensions: 1.54 kg 160 x 150 x 86 mm Package Weight: 3.2300 kg Warranty: 5 Years