The be quiet! Pure Power 12 M 1200W (MPN BN346) is a high-performance internal power supply unit (PSU) designed for advanced desktop PCs. It offers ATX 3.1 compatibility, 80 PLUS Gold efficiency, and PCIe 5.1 support, making it ideal for modern high-end systems. With support for modern standby, quiet operation, and full protective features, it is backed by a 10-year warranty for long-term reliability.

Key Features
Continuous power: 1200W (peak up to 1250?W)
Efficiency: 80 PLUS Gold certified, up to 93.7% efficiency
Compliance: ATX 3.1 / EPS 12V v2.92
PCIe support: Native 12VHPWR for PCIe 5.1 GPUs + 4 x 6+2-pin PCIe connectors
Rail design: Dual 12V rails for stable power under load
Cooling: 120?mm temperature-controlled fan with rifle bearing
Topology: LLC + SR + DC/DC for high performance and voltage stability
Modular cabling: Fully modular sleeved and flat cables
Warranty: 10 years manufacturer warranty

Full Technical Specification

Model / MPN:
Pure Power 12 M 1200W (BN346)

Form Factor:
ATX

Compliance:
ATX 3.1, EPS 12V v2.92

Power Output:
1200W continuous / 1250W peak

Efficiency Rating:
80 PLUS Gold (up to 93.7%)

Input Voltage:
110–240VAC

Input Frequency:
50–60Hz

Input Current:
7.5 A / 15 A

Power Factor:
> 0.98 at full load

Standby Power:
< 0.12 W Operating Temperature:
0–40 °C

MTBF:
>100,000 hours at 25 °C

12V Rails:
2 (55 A + 50 A)

Protections:
OCP, OVP, UVP, OPP, OTP, SCP, inrush, surge

Hold-up Time:
~19 ms at 100% load

Fan:
120 mm rifle-bearing fan

Noise Levels:
As low as ~10 dB(A) under light load

Modularity:
Fully modular

Connectors:
1 x 24-pin ATX
2 x 4+4-pin CPU (EPS)
1 x 12VHPWR (600 W)
4 x 6+2-pin PCIe
6 x SATA
2 x Molex (PATA)

Cable Length:
Up to 95 cm

Dimensions:
150 mm (W) x 160 mm (D) x 86 mm (H)

Weight:
1.92 kg (PSU only)

Warranty:
10 years