be quiet! Pure Power 12 M 1200W PSU – ATX 3.1, Gold, Modular, 10 Yr Warranty
The be quiet! Pure Power 12 M 1200W power supply delivers exceptional performance, ultra-quiet operation, and next-generation connectivity for high-end gaming and professional workstations. With ATX 3.1 and PCIe 5.1 support, it is engineered to handle the most demanding modern GPUs and multi-core CPUs with outstanding efficiency and long-term reliability.
Designed for quiet operation even under heavy load, it features a 120 mm rifle-bearing fan, fully modular cabling, and advanced power-topology engineering to ensure stable, clean power delivery. Certified to 80 PLUS Gold with up to 93.7% efficiency, it provides excellent performance with lower heat output and reduced energy consumption.
Backed by a 10-year manufacturer warranty, the Pure Power 12 M 1200W is the ideal choice for builders who want dependable, silent, future-proof power for their system.
Key Features
✔ 1200W continuous output with 1250W peak support
✔ 80 PLUS Gold efficiency (up to 93.7%) for lower energy use
✔ ATX 3.1 & EPS 12V v2.92 compliant for next-gen systems
✔ Native 12VHPWR connector for PCIe 5.1 graphics cards
✔ Dual 12V rails for stable and reliable load distribution
✔ Exceptionally quiet 120 mm rifle-bearing fan
✔ Fully modular cabling for clean, optimised airflow
✔ High-performance LLC + SR + DC/DC topology
✔ Full suite of protective circuits: OCP, OVP, UVP, OPP, OTP, SCP and more
✔ Backed by a lengthy 10-year manufacturer warranty
Technical Specifications
Model / MPN: Pure Power 12 M 1200W (BN346)
Form Factor: ATX
Compliance: ATX 3.1, EPS 12V v2.92
Performance
Continuous Power: 1200W
Peak Power: 1250W
Efficiency: 80 PLUS Gold (up to 93.7%)
Power Factor: >0.98 at full load
Standby Power: <0.12 W
Hold-up Time: ~19 ms at 100% load
MTBF: >100,000 hours at 25°C
Electrical
Input Voltage: 110–240 VAC
Input Frequency: 50–60 Hz
Input Current: 7.5 A / 15 A
12V Rails: 2 rails (55 A + 50 A)
Protections: OCP, OVP, UVP, OPP, OTP, SCP, inrush, surge
Cooling & Acoustics
Fan: 120 mm rifle-bearing
Noise Levels: As low as ~10 dB(A) under light load
Connectors
1 × 24-pin ATX
2 × 4+4-pin EPS (CPU)
1 × 12VHPWR (600 W)
4 × 6+2-pin PCIe
6 × SATA
2 × Molex (PATA)
Cabling
Type: Fully modular
Cable Length: Up to 95 cm
Physical
Dimensions: 150 × 160 × 86 mm
Weight: 1.92 kg (PSU only)
Warranty
10-year manufacturer warranty
Why Choose the Pure Power 12 M 1200W?
The Pure Power 12 M is engineered for quiet, reliable, and efficient operation, making it perfect for high-performance gaming rigs, powerful workstations, and next-gen GPU builds. Its ATX 3.1 compatibility and native PCIe 5.1 support ensure you are ready for current and future hardware, while the fully modular design keeps your system neat and airflow optimised. Backed by a 10-year warranty, it provides both peace of mind and long-term value.