The be quiet! System Power 11 550W PSU delivers reliable performance with 80 Plus Bronze efficiency, ensuring optimal power delivery for your system. Featuring ATX 3.1 and PCIe 5.1 compatibility, this power supply is ideal for gaming and high-performance builds. Enjoy stable voltage and low noise levels, enhancing your overall computing experience. Proven Reliability. Quiet Operation System Power 11 550W has been built with value-oriented users in mind that do not want to pass on reliability and quietness. Elaborated features such as ATX 3.1 compatibility and a temperature-controlled fan underline the value System Power 11 550W offers even at entry-level. FUTURE-PROOF YOUR SYSTEM Fulfills all ATX 3.1 specifications System Power 11 550W is an ATX 3.1 PSU and comes with both native integration of the 12V-2x6 connector for next-generation PCIe 5.1 graphics cards, and PCIe 6+2-pin connectors for support of current-gen GPUs. It handles power excursions up to double its rated power with ease. This makes the PSU versatile and the perfect choice for systems of today and the ones to come. VERY QUIET OPERATION High-quality fan for low noise System Power 11 550W is equipped with a temperature-controlled 120mm quality fan. It provides the low noise operation that be quiet! is famous for, offering remarkable quietness at this price-level. HIGH PERFORMANCE FOR YOUR SYSTEM Proven reliability for CPU and GPU System Power 11 550W provides stable and dependable power for CPU and GPU. This ensures a steady and reliable operation even when your PC meets an unexpectedly heavy load. 80 PLUS® BRONZE CERTIFICATION Efficient operation The 80 PLUS® Bronze certification of System Power 11 550W Bronze with an efficiency rating of up to 89.7% is convincing evidence of this PSU’s power saving operation. STRONG 12V RAIL For a stable PCIe graphics support System Power 11 550W provides enough power for demanding graphics cards. Safety protections defend against overcurrents, over- and undervoltages, overtemperature, short circuits and overloads, thus keeping your valuable components safe.