Product comparison · 2 power supply units

be quiet! Pure Power 9 CM vs be quiet! System Power 8

53specifications compared
26differ
27identical
13known for one product only

Key differences

Total power
- Pure Power 9 CM:400 W
- System Power 8:500 W
AC input voltage
- Pure Power 9 CM:100 - 240 V
- System Power 8:200 - 240 V
AC input frequency
- Pure Power 9 CM:50 - 60 Hz
- System Power 8:50 Hz
Input current
- Pure Power 9 CM:4 - 6 A
- System Power 8:4 A
Power factor
- Pure Power 9 CM:0.99
- System Power 8:0.98
Combined power (+3.3V)
- Pure Power 9 CM:120 W
- System Power 8:110 W
Combined power (+12V)
- Pure Power 9 CM:384 W
- System Power 8:456 W
Combined power (+5V)
- Pure Power 9 CM:120 W
- System Power 8:110 W

Side by side

Differences highlightedShow differences only

Comparison of Pure Power 9 CM, System Power 8
66 specifications	A be quiet! Pure Power 9 CM View product	B be quiet! System Power 8 View product
Power10 differ
Total powerDiffers	400 W	500 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	4 A
Power factorDiffers	0.99	0.98
Power Factor Correction (PFC) type	Active	Active
Combined power (+3.3V)Differs	120 W	110 W
Combined power (+12V)Differs	384 W	456 W
Combined power (+5V)Differs	120 W	110 W
Combined power (-12V)	3.6 W	3.6 W
Combined power (+5Vsb)	15 W	15 W
Max output current (+3.3V)	24 A	24 A
Max output current (+12V1)	24 A	24 A
Max output current (+12V2)	20 A	20 A
Max output current (+5V)	15 A	15 A
Max output current (-12V)	0.3 A	0.3 A
Max output current (+5Vsb)	3 A	3 A
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
Max output current (+12V)Known for one	Unknown — not stated by the source	38 A
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	6
Peripheral (Molex) power connectors (4-pin)Differs	1	0
PCI Express power connectors (6+2 pin)	2	2
CPU power connector (4+4 pin)	Yes	Yes
ATX power connector (20+4 pin)Known for one	Yes	Unknown — not stated by the source
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
Performance2 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 technologyDiffers	Rifle	Sleeve
Mean time between failures (MTBF)	100000 h	100000 h
Noise levelKnown for one	Unknown — not stated by the source	30.1 dB
Design2 differ
Product colour	Black	Black
Cooling type	Active	Active
Fan diameter	12 cm	12 cm
Number of fans	1 fan(s)	1 fan(s)
Fan speedDiffers	1060	2100
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	CE, CB, TÜV, RCM, CU
Weight & dimensions2 differ
Width	150 mm	150 mm
DepthDiffers	160 mm	140 mm
Height	86 mm	86 mm
WeightDiffers	1.96 kg	1.82 kg
Packaging data4 differ
ManualKnown for one	Yes	Unknown — not stated by the source
Package widthDiffers	210 mm	97 mm
Package depthDiffers	240 mm	195 mm
Package heightDiffers	96 mm	268 mm
Package weightDiffers	2.18 kg	2.17 kg
Package typeKnown for one	Unknown — not stated by the source	Box
Technical detailsidentical
Sustainability certificates	ENERGY STAR	ENERGY STAR
Other features2 differ
Noise level (quiet mode, 50%)Differs	11.2 dB	16.4 dB
Noise level (full-load mode, 100%)Differs	15.4 dB	30.1 dB
Cable managementKnown for one	Yes	Unknown — not stated by the source
Housing colourKnown for one	Black	Unknown — not stated by the source
Noise level (silent mode, <30%)Known for one	Unknown — not stated by the source	15.5 dB

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.

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