Product comparison · 2 power supply units

be quiet! SFX Power 2 vs Zalman ZM500-GLX power supply unit

34specifications compared
23differ
11identical
33known for one product only

Key differences

Total power
- SFX Power 2:400 W
- ZM500-GLX power supply unit:500 W
AC input voltage
- SFX Power 2:110 - 240 V
- ZM500-GLX power supply unit:115 - 230 V
Input current
- SFX Power 2:6 A
- ZM500-GLX power supply unit:8 A
Power factor
- SFX Power 2:0.9
- ZM500-GLX power supply unit:0.99
Combined power (+3.3V)
- SFX Power 2:120 W
- ZM500-GLX power supply unit:103 W
Combined power (+12V)
- SFX Power 2:360 W
- ZM500-GLX power supply unit:450 W
Combined power (+5V)
- SFX Power 2:120 W
- ZM500-GLX power supply unit:103 W
Combined power (-12V)
- SFX Power 2:6 W
- ZM500-GLX power supply unit:3.6 W

Side by side

Differences highlightedShow differences only

Comparison of SFX Power 2, ZM500-GLX
67 specifications	A be quiet! SFX Power 2 View product	B Zalman ZM500-GLX power supply unit Model ZM500-GLX View product
Power14 differ
Total powerDiffers	400 W	500 W
Peak powerKnown for one	450 W	Unknown — not stated by the source
AC input voltageDiffers	110 - 240 V	115 - 230 V
AC input frequency	50 - 60 Hz	50 - 60 Hz
Input currentDiffers	6 A	8 A
Maximum input current (@110V)Differs	+12V1,+12V2,+3.3V,+5V,+5Vsb,-12V	+12V,+3.3V,+5V,+5Vsb,-12V
Power factorDiffers	0.9	0.99
Power Factor Correction (PFC) type	Active	Active
Combined power (+3.3V)Differs	120 W	103 W
Combined power (+12V)Differs	360 W	450 W
Combined power (+5V)Differs	120 W	103 W
Combined power (-12V)Differs	6 W	3.6 W
Combined power (+5Vsb)	12.5 W	12.5 W
Max output current (+3.3V)Differs	21 A	20 A
Max output current (+12V1)Known for one	17 A	Unknown — not stated by the source
Max output current (+12V2)Known for one	16 A	Unknown — not stated by the source
Max output current (+5V)Differs	22 A	20 A
Max output current (-12V)Differs	0.5 A	0.3 A
Max output current (+5Vsb)	2.5 A	2.5 A
EfficiencyDiffers	87.5%	87%
Hold timeKnown for one	24 ms	Unknown — not stated by the source
Power protection featuresDiffers	Over current, Over power, Over voltage, Short circuit, Under voltage	Over power, Over voltage, Short circuit, Under voltage
Max output current (+12V)Known for one	Unknown — not stated by the source	37.5 A
Ports & interfacesidentical
Motherboard power connectorKnown for one	20+4 pin ATX	Unknown — not stated by the source
Number of SATA power connectorsKnown for one	4	Unknown — not stated by the source
Peripheral (Molex) power connectors (4-pin)Known for one	1	Unknown — not stated by the source
PCI Express power connectors (6+2 pin)Known for one	1	Unknown — not stated by the source
CPU P4 connector (4-pin)Known for one	1	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 type	Non-Modular	Non-Modular
PCI Express connectorKnown for one	Unknown — not stated by the source	Yes
Performance2 differ
Purpose	PC	PC
Power supply unit (PSU) form factorDiffers	SFX	ATX
80 PLUS certificationDiffers	80 PLUS Bronze	80 PLUS
Noise levelKnown for one	33.9 dB	Unknown — not stated by the source
Mean time between failures (MTBF)Known for one	100000 h	Unknown — not stated by the source
ATX versionKnown for one	Unknown — not stated by the source	2.3
Design1 differ
Product colour	Black	Black
Cooling type	Active	Active
Fan diameterDiffers	8 cm	12 cm
Number of fans	1 fan(s)	1 fan(s)
Fan speedKnown for one	2579	Unknown — not stated by the source
On/off switch	Yes	Yes
Fan locationKnown for one	Unknown — not stated by the source	Top
IlluminationKnown for one	Unknown — not stated by the source	No
Operational conditions1 differ
Operating temperature (T-T)Differs	10 - 50 °C	0 - 40 °C
Storage temperature (T-T)Known for one	Unknown — not stated by the source	-20 - 70 °C
Operating relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Storage relative humidity (H-H)Known for one	Unknown — not stated by the source	5 - 95%
Certificates1 differ
Compliance certificates	RoHS	RoHS
CertificationDiffers	CE, CB, TÜV	NTRL, FCC, CB, CE, KC, TUV
Weight & dimensions4 differ
WidthDiffers	100 mm	150 mm
DepthDiffers	125 mm	140 mm
HeightDiffers	63.5 mm	87 mm
WeightDiffers	950 g	1.95 kg
Packaging dataidentical
ManualKnown for one	Yes	Unknown — not stated by the source
Package widthKnown for one	199 mm	Unknown — not stated by the source
Package depthKnown for one	195 mm	Unknown — not stated by the source
Package heightKnown for one	75 mm	Unknown — not stated by the source
Package weightKnown for one	1.3 kg	Unknown — not stated by the source
Technical detailsidentical
Sustainability certificatesKnown for one	ENERGY STAR	Unknown — not stated by the source
Other featuresidentical
Warranty cardKnown for one	Yes	Unknown — not stated by the source
Noise level (silent mode, <30%)Known for one	20.7 dB	Unknown — not stated by the source
Noise level (quiet mode, 50%)Known for one	20.9 dB	Unknown — not stated by the source
Noise level (full-load mode, 100%)Known for one	33.9 dB	Unknown — not stated by the source
Power over Ethernet (PoE)Known for one	Unknown — not stated by the source	No

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