The be quiet! System Power 11 450W (MPN BP009EU) is a reliable, entry-level internal power supply unit (PSU) ideal for mid-range desktop PCs. Certified 80 PLUS Bronze, it delivers stable 450?W output with ATX 3.1 compatibility and support for PCIe 5.1 GPUs via two 6+2-pin connectors. Its non-modular design with flat cables provides hassle-free installation and dependable performance.

Key Features
Power Output: 450?W continuous
Certification: 80 PLUS Bronze (up to 89% efficiency at 230?V)
Compliance: ATX 3.1, EPS 12V v2.92
PCIe Support: Supports PCIe 5.1 GPUs via 2 x 6+2-pin connectors
Cooling: Temperature-controlled 120?mm rifle-bearing fan
Protection Features: OCP, OVP, UVP, OPP, OTP, SCP, surge and inrush protection
Cabling: Fully wired (non-modular) flat black cables
Warranty: 5-year manufacturer’s warranty

Full Technical Specification

Model / MPN:
System Power 11 450?W (BP009EU)

Form Factor:
ATX

Compliance:
ATX 3.1, EPS 12V v2.92

Power Output:
450?W continuous

Efficiency Certification:
80 PLUS Bronze (up to 89% at 50% load)

Input Voltage:
200–240?VAC

Input Frequency:
50?Hz

Input Current:
Up to 4 A

Power Factor:
= 0.98 at full load

Standby Power:
< 0.15?W

Operating Temperature:
0–40 °C

MTBF:

100,000 hours at 25 °C

12V Rail:
Single 12 V rail at 37.5 A

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

Fan:
120 mm rifle-bearing, temperature-controlled

Noise Level:
~10.5 dB(A) at light load, up to ~19.1 dB(A) at full load

Modularity:
Non-modular

Connectors:
1 x 20+4-pin ATX
1 x 4+4-pin CPU (EPS)
2 x 6+2-pin PCIe
5 x SATA
1 x Molex (4-pin PATA)

Cable Type:
Flat black cables

Cable Length:
Up to 90 cm

Dimensions:
150 mm (W) x 140 mm (D) x 86 mm (H)

Weight:
~1.7 kg

Certifications:
CE, CB, TUV, RoHS, UKCA, WEEE, ErP, Energy Star

Warranty:
5 years