be quiet! logo MPN: BN327

be quiet! System Power B10 power supply unit 550 W 20+4 pin ATX ATX Black

Released: Not on record
$228.10 from US · Amazon.com Updated 2 weeks ago Last updated Sep 3, 2026 03:14 UTC
4.8 204 ratings

Ratings & price sourced from Amazon.com (United States).

Wattage
550 W
Efficiency rating
80 PLUS Bronze
Depth
86 mm
Width
140 mm
Height
150 mm
Manual included
Y
Weight
1830 g
Purpose
PC
Fan speed
0 - 1800
View 73 specifications
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Overview

PROVEN RELIABILITY, QUIET OPERATION
System Power 10 550W has been built with price-conscious users in mind that do not want to dispense on reliability and quietness. Elaborated features such as a temperature-controlled fan and a remarkably low stand-by-drain underline the value System Power 10 550W offers even at entry-level.

VERY QUIET OPERATION
High-quality fan for low noise
System Power 10 550W is equipped with a temperature-controlled 120mm quality fan. It provides the low noise operation that be quiet! is famous for, offering remarkable quietness at this price-level.

HIGH PERFORMANCE FOR YOUR SYSTEM
Proven reliability for CPU and GPU
System Power 10 550W provides stable and dependable power for CPU and GPU. This ensures a steady and reliable operation even when your PC meets an unexpectedly heavy load.

80 PLUS® BRONZE CERTIFICATION
Efficient operation
The 80 PLUS Bronze certification of System Power 10 550W Bronze with an efficiency rating of up to 89.1% is convincing evidence of this PSU’s power saving operation.

STRONG 12V RAIL
For a stable PCIe graphics support
System Power 10 550W provides enough power for demanding graphics cards. Safety protections defend against overcurrents, over- and undervoltages, overtemperature, short circuits and overloads, thus keeping your valuable components safe.

Technical Specifications

Physical

5 SPECS
Depth
86 mm
Width
140 mm
Height
150 mm
Weight
1830 g
Colour
Black

Cooling

3 SPECS
Cooling type
Active
Fan size
120
Number of fans
1

Logistics & Packaging

5 SPECS
Package depth
268 mm
Package width
195 mm
Package height
97 mm
Package weight
2200 g
Country of origin
Germany

Power

2 SPECS
Wattage
550 W
Efficiency rating
80 PLUS Bronze

Graphics

1 SPEC
Illumination
No

General

57 SPECS
Manual included
Yes
Purpose
PC
Fan speed
0 - 1800
Hold time
17
Efficiency
89.1
ATX version
2.52
EPS version
2.92
Noise level
25.7
Cabling type
Non-Modular
Power factor
0.95
Certifications
CB, TÜV, cRUus, cTUVus, RCM (Australia), BSMI, CU (Russia)
Input current
4
On/off switch
Yes
Screws included
Yes
Warranty period
5
AC input voltage
200 - 240
Manual languages
DEU,ENG,ESP,FRE,POL,RUS
AC input frequency
50
Bearing type
Sleeve
Combined power (+5V)
120
Combined power (+12V)
550
Combined power (-12V)
3.6
PCI Express connector
Yes
CPU power cable length
600
Combined power (+3.3V)
120
Combined power (+5Vsb)
15
Compliance certificates
CCC,CE,Federal Communications Commission (FCC),RoHS,WEEE
SATA power cable length
450,550,570,670,690
CPU P4 connector (4-pin)
1
Max output current (+5V)
20
Max output current (+12V)
45.83
Max output current (-12V)
0.3
Power protection features
Over current,Over power,Over voltage,Overheating,Short circuit,Under voltage
Storage temperature
-20 - 70
Max output current (+3.3V)
20
Max output current (+5Vsb)
3
Motherboard power connector
20+4 pin ATX
Operating temperature
0 - 40
Eco certifications
ENERGY STAR,ErP
CPU power connector (4+4 pin)
Yes
Noise level (quiet mode, 50%)
9.4
Power Good signal delay range
100 - 150
ATX power connector (20+4 pin)
Yes
Motherboard power cable length
550
PCI Express power cable length
650
Noise level (silent mode, <30%)
8.6
Number of PATA power connectors
1
Number of SATA power connectors
5
Storage relative humidity (H-H)
0 - 95
MTBF
100000 h
Operating humidity
0 - 90
Noise level (full-load mode, 100%)
25.7
Power Factor Correction (PFC) type
Active
Power supply unit (PSU) form factor
ATX
Peripheral (Molex) power cable length
790
PCI Express power connectors (6+2 pin)
2
Peripheral (Molex) power connectors (4-pin)
1
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Market Value History

Sources

Icecat product datasheet

Product lifecycle

In production

Still listed as on-market by the manufacturer — actively sold and supported.

Lifecycle status is derived from catalog data and is indicative, not a manufacturer support guarantee.

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