be quiet! System Power 11 450W is ATX 3.1 compliant and PCIe 5.1 compatible, 5-year manufacturer's warranty

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)

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