Zalman ZM660-XT power supply unit vs Zalman ZM770-XT power supply unit

Comparison of ZM660-XT, ZM770-XT

16 specifications	A Zalman ZM660-XT power supply unit Model ZM660-XT View product	B Zalman ZM770-XT power supply unit Model ZM770-XT View product
Power1 differ
Total powerDiffers	660 W	770 W
Efficiency	88%	88%
Power protection features	Overload, Short circuit	Overload, Short circuit
Ports & interfacesidentical
Number of SATA power connectors	4	4
PCI Express power connectors (6-pin)	Yes	Yes
ATX Power connector (24-pin)	Yes	Yes
Cabling type	Semi-Modular	Semi-Modular
Designidentical
Product colour	Black	Black
Fan diameter	14 cm	14 cm
Operational conditionsidentical
Operating temperature (T-T)	0 - 40 °C	0 - 40 °C
Storage temperature (T-T)	-20 - 80 °C	-20 - 80 °C
Operating relative humidity (H-H)	5 - 95%	5 - 95%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Other featuresidentical
Dimensions (WxDxH)	150 x 180 x 86 mm	150 x 180 x 86 mm
Ports quantity	6	6
Power requirements	100 - 240VAC, 50-60Hz	100 - 240VAC, 50-60Hz

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.