Product comparison · 2 power supply units

be quiet! Pure Power 11 300W vs be quiet! System Power B9

44specifications compared
17differ
27identical
27known for one product only

Key differences

AC input voltage
- Pure Power 11 300W:100 - 240 V
- System Power B9:200 - 240 V
AC input frequency
- Pure Power 11 300W:50 - 60 Hz
- System Power B9:50 Hz
Input current
- Pure Power 11 300W:5 A
- System Power B9:2.5 A
Power factor
- Pure Power 11 300W:0.99
- System Power B9:0.95
Combined power (+12V)
- Pure Power 11 300W:288 W
- System Power B9:276 W
Max output current (+3.3V)
- Pure Power 11 300W:21 A
- System Power B9:17 A
Max output current (+12V2)
- Pure Power 11 300W:18 A
- System Power B9:14 A
SATA power cable length
- Pure Power 11 300W:450,600,750 mm
- System Power B9:400 mm

Side by side

Differences highlightedShow differences only

Comparison of Pure Power 11 300W, System Power B9
71 specifications	A be quiet! Pure Power 11 300W View product	B be quiet! System Power B9 View product
Power7 differ
Total power	300 W	300 W
Peak powerKnown for one	350 W	Unknown — not stated by the source
AC input voltageDiffers	100 - 240 V	200 - 240 V
AC input frequencyDiffers	50 - 60 Hz	50 Hz
Input currentDiffers	5 A	2.5 A
Power factorDiffers	0.99	0.95
Power Factor Correction (PFC) type	Active	Active
Combined power (+3.3V)	103 W	103 W
Combined power (+12V)Differs	288 W	276 W
Combined power (+5V)	103 W	103 W
Combined power (-12V)	3.6 W	3.6 W
Combined power (+5Vsb)	12.5 W	12.5 W
Max output current (+3.3V)Differs	21 A	17 A
Max output current (+12V1)	18 A	18 A
Max output current (+12V2)Differs	18 A	14 A
Max output current (+5V)	15 A	15 A
Max output current (-12V)	0.3 A	0.3 A
Max output current (+5Vsb)	2.5 A	2.5 A
Efficiency	87%	87%
Hold time	17 ms	17 ms
Power protection features	Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage	Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage
Ports & interfaces2 differ
Motherboard power connector	20+4 pin ATX	20+4 pin ATX
Motherboard power cable length	45 cm	45 cm
Number of PATA power connectors	2	2
Number of SATA power connectors	4	4
SATA power cable lengthDiffers	450,600,750 mm	400 mm
Peripheral (Molex) power connectors (4-pin)Known for one	0	Unknown — not stated by the source
PCI Express power connectors (6+2 pin)Known for one	1	Unknown — not stated by the source
PCI Express power cable lengthKnown for one	50 cm	Unknown — not stated by the source
CPU power connector (4+4 pin)Known for one	Yes	Unknown — not stated by the source
CPU power cable lengthDiffers	55 cm	45 cm
Floppy disk drive connectorKnown for one	Yes	Unknown — not stated by the source
Cabling type	Non-Modular	Non-Modular
CPU P4 connector (4-pin)Known for one	Unknown — not stated by the source	1
Performance1 differ
Purpose	PC	PC
Power supply unit (PSU) form factor	ATX	ATX
80 PLUS certificationDiffers	80 PLUS Bronze	80 PLUS
ATX version	2.4	2.4
Bearing technologyKnown for one	Rifle	Unknown — not stated by the source
Silent modeKnown for one	Unknown — not stated by the source	Yes
Design1 differ
Product colourDiffers	Black	Grey
Fan diameter	12 cm	12 cm
Number of fans	1 fan(s)	1 fan(s)
IlluminationKnown for one	Unknown — not stated by the source	No
On/off switchKnown for one	Unknown — not stated by the source	Yes
Certificates1 differ
Compliance certificates	RoHS	RoHS
CertificationDiffers	ErP, WEEE	CE, CB, TÜV, RCM, CU
Safety regulation & standardsidentical
SafetyKnown for one	CE, TÜV, CU	Unknown — not stated by the source
Weight & dimensions2 differ
Width	150 mm	150 mm
DepthDiffers	150 mm	140 mm
Height	86 mm	86 mm
WeightDiffers	1.76 kg	1.52 kg
Packaging dataidentical
ManualKnown for one	Yes	Unknown — not stated by the source
Package widthKnown for one	210 mm	Unknown — not stated by the source
Package depthKnown for one	240 mm	Unknown — not stated by the source
Package heightKnown for one	96 mm	Unknown — not stated by the source
Package weightKnown for one	2.05 kg	Unknown — not stated by the source
Package typeKnown for one	Box	Unknown — not stated by the source
Technical detailsidentical
Sustainability certificates	ENERGY STAR	ENERGY STAR
Logistics dataidentical
Master (outer) case widthKnown for one	326 mm	Unknown — not stated by the source
Master (outer) case lengthKnown for one	514 mm	Unknown — not stated by the source
Master (outer) case heightKnown for one	241 mm	Unknown — not stated by the source
Master (outer) case gross weightKnown for one	13.5 kg	Unknown — not stated by the source
Products per master (outer) caseKnown for one	6 pc(s)	Unknown — not stated by the source
Harmonized System (HS) codeKnown for one	Unknown — not stated by the source	84733020
Other features3 differ
Screws includedKnown for one	Yes	Unknown — not stated by the source
Cable ties includedKnown for one	Yes	Unknown — not stated by the source
Noise level (silent mode, <30%)Differs	10.6 dB	11.6 dB
Noise level (quiet mode, 50%)Differs	10.8 dB	12.1 dB
Noise level (full-load mode, 100%)Differs	13.2 dB	23.1 dB
Packaging contentidentical
Cables includedKnown for one	Unknown — not stated by the source	AC

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.