Product comparison · 2 power supply units

be quiet! Pure Power 9 CM vs be quiet! System Power B8

44specifications compared
25differ
19identical
20known for one product only

Key differences

Total power
- Pure Power 9 CM:400 W
- System Power B8:350 W
AC input voltage
- Pure Power 9 CM:100 - 240 V
- System Power B8:200 - 240 V
AC input frequency
- Pure Power 9 CM:50 - 60 Hz
- System Power B8:50 Hz
Input current
- Pure Power 9 CM:4 - 6 A
- System Power B8:3 A
Power factor
- Pure Power 9 CM:0.99
- System Power B8:0.98
Combined power (+3.3V)
- Pure Power 9 CM:120 W
- System Power B8:103 W
Combined power (+12V)
- Pure Power 9 CM:384 W
- System Power B8:324 W
Combined power (+5V)
- Pure Power 9 CM:120 W
- System Power B8:103 W

Side by side

Differences highlightedShow differences only

Comparison of Pure Power 9 CM, System Power B8
64 specifications	A be quiet! Pure Power 9 CM View product	B be quiet! System Power B8 View product
Power13 differ
Total powerDiffers	400 W	350 W
Peak powerKnown for one	450 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	4 - 6 A	3 A
Power factorDiffers	0.99	0.98
Power Factor Correction (PFC) type	Active	Active
Combined power (+3.3V)Differs	120 W	103 W
Combined power (+12V)Differs	384 W	324 W
Combined power (+5V)Differs	120 W	103 W
Combined power (-12V)Known for one	3.6 W	Unknown — not stated by the source
Combined power (+5Vsb)Known for one	15 W	Unknown — not stated by the source
Max output current (+3.3V)Differs	24 A	19 A
Max output current (+12V1)Differs	24 A	20 A
Max output current (+12V2)Differs	20 A	16 A
Max output current (+5V)	15 A	15 A
Max output current (-12V)	0.3 A	0.3 A
Max output current (+5Vsb)Known for one	3 A	Unknown — not stated by the source
EfficiencyDiffers	91%	87%
Hold timeDiffers	26 ms	18 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 & interfaces3 differ
Motherboard power connector	20+4 pin ATX	20+4 pin ATX
Motherboard power cable lengthKnown for one	45 cm	Unknown — not stated by the source
Number of PATA power connectors	2	2
Number of SATA power connectorsDiffers	5	4
Peripheral (Molex) power connectors (4-pin)Known for one	1	Unknown — not stated by the source
PCI Express power connectors (6+2 pin)Differs	2	1
CPU power connector (4+4 pin)	Yes	Yes
ATX power connector (20+4 pin)	Yes	Yes
Floppy disk drive connectorKnown for one	Yes	Unknown — not stated by the source
Floppy drive power connectorKnown for one	1	Unknown — not stated by the source
Cabling typeDiffers	Semi-Modular	Non-Modular
Performance1 differ
Purpose	PC	PC
Power supply unit (PSU) form factor	ATX	ATX
80 PLUS certificationDiffers	80 PLUS Silver	80 PLUS
ATX version	2.4	2.4
Bearing technologyKnown for one	Rifle	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	100000 h	Unknown — not stated by the source
Design3 differ
Product colourDiffers	Black	Grey
Cooling type	Active	Active
Fan diameter	12 cm	12 cm
Number of fans	1 fan(s)	1 fan(s)
Fan speedDiffers	1060	1650
Fan locationDiffers	Side	Top
On/off switch	Yes	Yes
Packaging contentidentical
Cables includedKnown for one	AC, PCIe	Unknown — not stated by the source
Certificates1 differ
Compliance certificates	RoHS	RoHS
CertificationDiffers	CE, CB, TÜV, FCC, cTUVus, RCM, BSMI, CU	ErP, WEEE
Weight & dimensions2 differ
Width	150 mm	150 mm
DepthDiffers	160 mm	140 mm
Height	86 mm	86 mm
WeightDiffers	1.96 kg	1.6 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	2.18 kg	Unknown — not stated by the source
Technical detailsidentical
Sustainability certificates	ENERGY STAR	ENERGY STAR
Other features2 differ
Noise level (quiet mode, 50%)Differs	11.2 dB	12.3 dB
Noise level (full-load mode, 100%)Differs	15.4 dB	24.9 dB
Cable managementKnown for one	Yes	Unknown — not stated by the source
Housing colourKnown for one	Black	Unknown — not stated by the source
Operational conditionsidentical
Operating temperature (T-T)Known for one	Unknown — not stated by the source	0 - 40 °C
Safety regulation & standardsidentical
SafetyKnown for one	Unknown — not stated by the source	CE, CB, TÜV, RCM, CU

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.

More power supply unit comparisons

All power supply unit comparisons