be quiet! System Power 11 550W is ATX 3.1 compliant and PCIe 5.1

be quiet! System Power 11 550W Proven reliability, quiet operation. The be quiet! System Power 11 550W is built for users who need dependable power delivery, modern compatibility, and low-noise performance at an accessible price point. It follows the ATX 3.1 standard and includes native support for PCIe 5.1 graphics cards through a 12V-2×6 connector, making it ready for current and next-generation PC builds. Key features ATX 3.1 compliant Native PCIe 5.1 support One 12V-2×6 connector rated up to 300 W Two PCIe 6 2-pin connectors for additional GPU support 80 PLUS Bronze efficiency Temperature-controlled 120 mm quality fan DC-to-DC technology for tight voltage regulation Strong single 12 V rail for stable system performance Low standby power consumption 5-year manufacturer warranty Technical specifications Model: System Power 11 550 W Continuous power: 550 W Form factor: ATX 3.1 Topology: Double forward DC-to-DC Efficiency certification: 80 PLUS Bronze Maximum efficiency: Up to 89.7% Fan size: 120 mm Fan control: Temperature-controlled 12 V rail: Single rail Max. combined power on 12 V: 550 W PCIe 5.1 / 12V-2×6: 1 connector, up to 300 W PCIe 6 2-pin: 2 connectors SATA: 5 connectors PATA: 1 connector Motherboard connector: 1 x 20 4-pin CPU connectors: 1 x P4 4, 1 x P4 Dimensions: 150 x 140 x 86 mm Color: Black Warranty: 5 years Why choose it? The System Power 11 550W combines quiet cooling, modern power delivery standards, and solid protection features to create a reliable foundation for a gaming or productivity PC. It is a practical choice for users who want a trustworthy PSU with future-ready connectivity and no unnecessary extras.