Product comparison · 2 power supply units

Zalman ZM400-LE power supply unit vs Zalman ZM550-XG power supply unit

38specifications compared
23differ
15identical
17known for one product only

Key differences

Total power
- ZM400-LE power supply unit:400 W
- ZM550-XG power supply unit:550 W
AC input voltage
- ZM400-LE power supply unit:115 V
- ZM550-XG power supply unit:100 - 240 V
AC input frequency
- ZM400-LE power supply unit:47 - 63 Hz
- ZM550-XG power supply unit:50 - 60 Hz
Input current
- ZM400-LE power supply unit:8 A
- ZM550-XG power supply unit:7 A
Power factor
- ZM400-LE power supply unit:0.5
- ZM550-XG power supply unit:99
Combined power (+3.3V)
- ZM400-LE power supply unit:120 W
- ZM550-XG power supply unit:140 W
Combined power (+12V)
- ZM400-LE power supply unit:300 W
- ZM550-XG power supply unit:540 W
Combined power (+5V)
- ZM400-LE power supply unit:120 W
- ZM550-XG power supply unit:140 W

Side by side

Differences highlightedShow differences only

Comparison of ZM400-LE, ZM550-XG
55 specifications	A Zalman ZM400-LE power supply unit Model ZM400-LE View product	B Zalman ZM550-XG power supply unit Model ZM550-XG View product
Power15 differ
Total powerDiffers	400 W	550 W
AC input voltageDiffers	115 V	100 - 240 V
AC input frequencyDiffers	47 - 63 Hz	50 - 60 Hz
Input currentDiffers	8 A	7 A
Maximum input current (@110V)Differs	+12V1,+12V2,+3.3V,+5V,+5Vsb,-12V	+12V,+3.3V,+5V,+5Vsb,-12V
Power factorDiffers	0.5	99
Power Factor Correction (PFC) typeKnown for one	Unknown — not stated by the source	Active
Combined power (+3.3V)Differs	120 W	140 W
Combined power (+12V)Differs	300 W	540 W
Combined power (+5V)Differs	120 W	140 W
Combined power (+5Vsb)Differs	10 W	12.5 W
Max output current (+3.3V)Differs	16 A	22 A
Max output current (+12V)Known for one	Unknown — not stated by the source	45 A
Max output current (+5V)Differs	15 A	18 A
Max output current (+5Vsb)Differs	2 A	12.5 A
EfficiencyDiffers	81%	92%
Power protection featuresDiffers	Over power, Over voltage, Short circuit, Under voltage	Over current, Over power, Over voltage, Overheating, Short circuit, Under voltage
Max output current (+12V1)Known for one	17 A	Unknown — not stated by the source
Max output current (+12V2)Known for one	14 A	Unknown — not stated by the source
Ports & interfaces3 differ
Number of SATA power connectorsDiffers	4	2
Peripheral (Molex) power connectors (4-pin)Differs	3	6
PCI Express power connectors (6+2 pin)Known for one	Unknown — not stated by the source	4
ATX power connector (20+4 pin)Known for one	Unknown — not stated by the source	Yes
Floppy disk drive connectorKnown for one	Unknown — not stated by the source	Yes
PCI Express connectorKnown for one	Unknown — not stated by the source	Yes
Cabling typeDiffers	Non-Modular	Semi-Modular
PCI Express power connectors (6-pin)Known for one	2	Unknown — not stated by the source
Performanceidentical
80 PLUS certificationKnown for one	Unknown — not stated by the source	80 PLUS Gold
Mean time between failures (MTBF)Known for one	Unknown — not stated by the source	100000 h
ATX versionKnown for one	2.3	Unknown — not stated by the source
Design2 differ
Product colourDiffers	Black	Yellow
Fan diameterDiffers	12 cm	13.9 cm
LED indicatorsKnown for one	Unknown — not stated by the source	No
Operational conditions2 differ
Storage temperature (T-T)Differs	-40 - 70 °C	-20 - 80 °C
Operating relative humidity (H-H)Differs	5 - 85%	5 - 95%
Weight & dimensions1 differ
DepthDiffers	140 mm	180 mm
WeightKnown for one	1.7 kg	Unknown — not stated by the source
Packaging dataidentical
ManualKnown for one	Unknown — not stated by the source	Yes
Other featuresidentical
Dimensions (WxDxH)Known for one	Unknown — not stated by the source	150 x 180 x 86 mm
Certificatesidentical
CertificationKnown for one	ErP Lot 6	Unknown — not stated by the source

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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