Overview

The be quiet! Pure Power 12 M 850W is a fully modular 80 PLUS Gold certified power supply from the renowned German manufacturer. Compliant with the ATX 3.1 standard and equipped with a native 12VHPWR connector, it provides reliable power for modern high-end GPUs and CPUs. The 135mm silent fan ensures near-inaudible operation under normal loads, making it an excellent choice for a quiet gaming or workstation PC.

Key Features

  • 80 PLUS Gold certification delivers up to 92% efficiency, reducing electricity costs and heat output
  • ATX 3.1 compliant with native 12VHPWR cable (supports RTX 40/50 series directly)
  • Fully modular design allows you to use only the cables you need, simplifying cable management
  • 135mm silent fan with fluid-dynamic bearing provides long life and quiet operation
  • Wide input voltage (100–240V AC) works flawlessly with Japanese 100V household outlets
  • 5-year manufacturer warranty (may be extended with product registration)

Compatibility Guide

  • Form factor: Standard ATX PS/2, fits most ATX and E-ATX cases
  • Connectors:
    • 24-pin ATX main
    • CPU 8-pin (4+4) x2
    • PCIe 5.0 12VHPWR (12+4 pin) x1
    • PCIe 6+2 pin x4
    • SATA x9, peripheral 4-pin x3
  • Depth of 160mm fits comfortably in mid-tower cases even with large cable compartments
  • Recommended for single-GPU gaming systems up to high-end configurations

Ideal System Configurations

  • Modern gaming PC: Pairs well with RTX 5080/5090 or RX 9070 XT and Ryzen 7/9 or Core i7/i9 CPUs
  • Silent-focused build: Noise levels of 17–25 dBA (under full load ~28 dBA) make it perfect for quiet home offices or late-night gaming
  • DIY builder intermediate: Fully modular cabling eases installation and cable routing, great for first-time ATX 3.1 builders

Upgrade Notes

  • The 850W capacity comfortably handles a 150W CPU + 350W GPU combo. For RTX 5090 (450W+) combined with a high-clocked CPU, consider a 1000W unit
  • ATX 3.1 transient response ensures stability during sudden power spikes from modern GPUs
  • Not suitable for dual-GPU configurations or extreme overclocking on both CPU and GPU simultaneously