The be quiet! Pure Power 13 M 850W is a fully modular power supply designed to provide stable energy for modern PC builds. It delivers a continuous power output of 850 W and reaches peak levels of 900 W, utilizing an ATX 3.1 form factor and an 80 PLUS Gold efficiency rating that can reach up to 94.4%. This efficiency helps reduce energy waste and heat during operation. To keep the system quiet, it features a 120 mm silence-optimized fan with a rifle bearing and a 4-pole motor, which supports semi-passive zero-RPM cooling to eliminate noise during low-load tasks. Even at full capacity, the noise level stays around 17.6 dBA. Inside its black chassis measuring 160 x 150 x 86 mm, the unit employs an LLC + SR + DC/DC topology to ensure clean power delivery. It is equipped with a wide range of protections, including OTP, OCP, and SCP, to keep your components safe. The fully modular design allows you to use only the cables you need, including a dedicated 12V-2x6 connector for PCIe 5.1 and four 8-pin PCIe connectors, which makes cable management much easier in your case. With a lifespan exceeding 100,000 hours at 25°C, this unit is a reliable choice for gamers and professionals who need a dependable power source for high-performance hardware.