The be quiet! Power Zone 2 850W is a fully modular power supply designed for high-performance systems requiring stable and efficient energy delivery. It provides a continuous power output of 850W, reaching up to 920W at peak, and adheres to the ATX 3.1 standard. With an 80 PLUS Platinum certification and Cybenetics ETA Platinum rating, it achieves efficiency levels up to 94.1%, which helps reduce energy waste and heat generation during operation. To keep noise to a minimum, the unit features a 140mm Pure Wings 3 fan with rifle bearings, operating in a semi-passive zero-RPM mode that keeps the system silent under light loads. Even at full capacity, the noise level remains low at 24.9 dB(A). The internal design utilizes an LLC + SR + DC/DC topology and a single 12V rail capable of delivering 70.8 A, ensuring consistent power for demanding components. Its black chassis measures 160 x 150 x 86 mm and houses a comprehensive set of protections including OTP, OCP, OPP, SCP, OVP, UVP, and SIP to safeguard your hardware. The fully modular system allows you to use only the necessary cables—available in both sleeved and flat varieties—including a dedicated 12V-2x6 connector for PCIe 5.1 GPUs, which comes with a 90° angled adapter to simplify cable management in tighter cases.