Proven Reliability and Good Efficiency be quiet! System Power 9 400W offers renowned be quiet! reliability and quietness for price-conscious PC builders. Rock-solid stability with two strong 12V-rails DC-to-DC technology for tight voltage regulation Multi-GPU support with two PCIe connectors Temperature-controlled 120mm fan reduces system noise Stand-by drain of less than 0.15 watts 80PLUS® Bronze efficiency (up to 89 ) Attractive black sleeved cables Complete suite of top safety features Meets latest Intel® C6/C7, ErP and Energy Star 6.1 guidelines 3-year manufacturer’s warranty Product conception, design and quality control in Germany Very Quiet Operation    Attained by using a high-quality fan System Power 9 400W is equipped with a temperature-controlled 120mm fan. It provides you with the low noise operation that be quiet! is famous for, built into an entry-level system   80 Bronze Certification   High operating efficiency The 80PLUS® Bronze certification is convincing evidence of this PSU’s efficient and power saving operation. It is a remarkable achievement for this class of PSU, realizing an efficiency rating of up to 89 .    High Performance for Your System   Proven reliability for CPU and GPU System Power 9 400W provides stable and dependable power for CPU and GPU. It is equipped with two independent 12V-rails and supports several graphics cards with two PCI express connectors for multi-GPU systems.   Innovative DC-to-DC Conversion   Equipped with a wealth of advanced technology The PSU is equipped with DC-to-DC conversion for tight voltage regulation, even under heavy cross-loading conditions. This ensures reliable operation and makes it ready for the next generation of processors and graphics cards.   High-Quality Cable Design   Attractive design for high performance, cost-effective systems System Power 9 400W comes with full high-quality black sleeved cables that add a touch of class to any PC system.   Comprehensive Protection    A complete range of safety features Top component protection with a full suite of safety functions, including OCP, OVP, OPP, OTP UVP and SCP, which provide the ultimate in secure operation. Specification Form Factor: ATX Modular: Fully Wired Series: Be Quiet! System Power 9 Compatability: ATX 12V v2.4 Wattage: 400 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 4-pin 5 x SATA 15-pin (HDD, Drives)\" Rail Design: Dual 12V AC Input: AC200-240 V PFC: Active PFC Fan Type: High-quality 120mm fan Sleeve Bearing Fan Bearin Sleeve Bearing Noise: dB(A) at 20 load: 9.5 dB(A) at 50 load: 10.4 dB(A) at 100 load: 18.6 80 Certification: 80 Bronze Efficiency: Up to 89 MTBF: \"100,000 hours\" Protection: Over current Over voltage Under voltage Short circuit Over temperature Over power Features: See Overview Weight/Dimensions: 1.82 kg 140 x 150 x 86 mm Package Weight: 2.2500 kg Warranty: 3 Years