be quiet! System Power B9 power supply unit 300 W 20+4 pin ATX ATX Grey
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- Wattage
- 300 W
- Efficiency rating
- 80 PLUS
- Depth
- 140 mm
- Width
- 150 mm
- Height
- 86 mm
- Weight
- 1520 g
- Purpose
- PC
- Hold time
- 17
- Efficiency
- 87
1 / 2
Shopping actions
Overview
The be quiet! System Power B9 power supply unit 300 W 20+4 pin ATX ATX Grey features 300 W output, 80 PLUS 80 PLUS efficiency and a 120 mm fan. Full verified specifications are listed below.
Technical Specifications
Physical
6 SPECS
Depth
140 mm
Width
150 mm
Height
86 mm
Weight
1520 g
Colour
Grey
Customs (HS) code
84733020
Graphics
1 SPEC
Illumination
No
Power
2 SPECS
Wattage
300 W
Efficiency rating
80 PLUS
Cooling
2 SPECS
Fan size
120
Number of fans
1
General
39 SPECS
Purpose
PC
Hold time
17
Efficiency
87
ATX version
2.4
Silent mode
Yes
Cabling type
Non-Modular
Power factor
0.95
Certifications
CE, CB, TÜV, RCM, CU
Input current
2.5
On/off switch
Yes
Included cables
AC
AC input voltage
200 - 240
AC input frequency
50
Combined power (+5V)
103
Combined power (+12V)
276
Combined power (-12V)
3.6
CPU power cable length
450
Combined power (+3.3V)
103
Combined power (+5Vsb)
12.5
Compliance certificates
RoHS
SATA power cable length
400
CPU P4 connector (4-pin)
1
Max output current (+5V)
15
Max output current (-12V)
0.3
Power protection features
Over current,Over power,Over voltage,Overheating,Short circuit,Under voltage
Max output current (+12V1)
18
Max output current (+12V2)
14
Max output current (+3.3V)
17
Max output current (+5Vsb)
2.5
Motherboard power connector
20+4 pin ATX
Eco certifications
ENERGY STAR
Noise level (quiet mode, 50%)
12.1
Motherboard power cable length
450
Noise level (silent mode, <30%)
11.6
Number of PATA power connectors
2
Number of SATA power connectors
4
Noise level (full-load mode, 100%)
23.1
Power Factor Correction (PFC) type
Active
Power supply unit (PSU) form factor
ATX
Market Value History
Sources
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.