Product comparison · 2 power supply units

ADATA HM-550 power supply unit vs ADATA HM-850 power supply unit

Key differences

Total power
- HM-550 power supply unit:550 W
- HM-850 power supply unit:850 W
Input current
- HM-550 power supply unit:8 A
- HM-850 power supply unit:12 A
PCI Express power connectors (6-pin)
- HM-550 power supply unit:1
- HM-850 power supply unit:8

Differences highlightedShow differences only

Comparison of HM-550, HM-850
19 specifications	A ADATA HM-550 power supply unit Model HM-550 View product	B ADATA HM-850 power supply unit Model HM-850 View product
Power2 differ
Total powerDiffers	550 W	850 W
AC input voltage	100 - 240 V	100 - 240 V
Input currentDiffers	8 A	12 A
Efficiency	82%	82%
Hold time	16 ms	16 ms
Power protection features	Over current, Over power, Over voltage, Short circuit, Under voltage	Over current, Over power, Over voltage, Short circuit, Under voltage
Ports & interfaces1 differ
Peripheral (Molex) power connectors (4-pin)	0	0
PCI Express power connectors (6-pin)Differs	1	8
PCI Express power connectors (6+2 pin)Known for one	2	Unknown — not stated by the source
CPU power connector (4+4 pin)	Yes	Yes
ATX power connector (20+4 pin)	Yes	Yes
Performanceidentical
Mean time between failures (MTBF)	100000 h	100000 h
Designidentical
Product colour	Grey	Grey
Operational conditionsidentical
Operating temperature (T-T)	0 - 50 °C	0 - 50 °C
Storage temperature (T-T)	-20 - 70 °C	-20 - 70 °C
Operating relative humidity (H-H)	20 - 90%	20 - 90%
Safety regulation & standards1 differ
SafetyDiffers	CE/CB/FCC/TUV/cUL/BSMI	CE / CB / FCC / TUV / cUL / BSMI
Other featuresidentical
Dimensions (WxDxH)	150 x 160 x 86 mm	150 x 160 x 86 mm
Weight & dimensionsidentical
WeightKnown for one	Unknown — not stated by the source	3.14 kg

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.