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Premium Chieftec Navitas 650 W PSU Review

Announced several months ago, Chieftec Navitas series of PSUs has managed to win the hearts of PC enthusiasts in many areas across the globe. Unlike the majority lineups where the junior model features 450/550 W power, Navitas offers 650 W GPM-650C as the first model in the line to satisfy the needs of fastidious customers. Upon the whole, the series counts five models of 650 W, 750 W, 850 W, 1000 W, and 1250 W power. Let’s see whether the junior representative of the series deserves universal acclaim.

Basic Specs and Connectors

Chieftec Navitas 650 W is delivered in a gray cardbox that contains its basic specifications. The unit is able to gain up to 648 W power on +12VDC rail efficiency. The correlation of efficiency on +12VDC rail and an overall power makes up 0.997 points. The model itself is housed in a gray case with large texture coating. Its layout might boast the incorporation of a high-voltage Nippon Chemi-Con capacitor and as much as efficient Capxon capacitors.

The PSU integrates the so-called modular cabling system. Such framework allows the user to remove all unnecessary wires and promote for a better airflow within PC chassis. The length of cables is enough to house the unit within the chassis with the top PSU localization, as well as within the majority of midi-tower chassis with bottom PSU localization.

Therefore, the overall list of available sockets and connectors looks the following way:
— Main power socket (24-pin) with 1 demountable connector;
— SATA socket (15-pin) with 6 connectors on two harness;
— PCI Express 2.0 VGA power socket (8-pin) with 2 demountable connectors;
— SSI processor socket (8-pin) with 1 demountable connector;
— PCI Express 1.0 VGA power socket (6-pin) with no connectors;
— 12V power socket (4-pin) with no connectors;
— Peripheral socket (4-pin) with 3 ergonomic connectors;
— Floppy drive socket (4-pin) with 1 connector.

Cooling Solution

To continue, Navitas 650 W is furnished with a single 140 mm fan, entitled D14BH-12 (Yate Loon Electronics), that is based on a ball bearing. In keeping with the manufacturer’s data, it is able to speed up to 2800 RPM to provide for the maximal airflow within the unit.

APFC and main invertor elements are located on middle-sized heatsinks with no ribs, whereas transistors of a synchronous rectifier are located on an affiliate vertical board with no heatspreader. DC/DC convertors on +5VDC and +3.3VDC rails are also located on an independent board with connectors. Due to such layout, designers provided much space for an efficient cooling with lowered airflow resistance.

Performance

Testing results demonstrate that Chieftec Navitas 650 W is able to gain more than 88% efficiency in the power range of 200 W- 650 W. The maximal recorded efficiency index equals to 89.8% at 200 W loading. This index steps down with the reduction of loading: on 50 W power conditions the unit performs at 77.5%. Such outstanding performance allowed the model to pick up 80Plus Gold certificate.
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  • 16 April 2014, 13:22
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