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Gold-Winning Deepcool DQ750 PSU Review

Deepcool is primarily renowned for its PC cooling solutions. Still, following the tendencies of portfolio diversification, the company decided to add chassis as well as PSUs to its production line. The latest DQ750 release proves that quality does not depend upon brand or device type. This model has already managed to receive 80Plus Gold certificate that witnesses its high ambitions. Let’s see what else this PSU can offer to an average user.

Brief Overview

Deepcool DQ750 is housed in a stylish case (150x160x86 mm dimensions) with a large formation coating. The availability of a blue LED backlight makes a dissonance with external layout. All basic parameters are recorded on the case itself. Hence, the model corresponds to ATX 12V v2.31 and SSI EPS 12V 2.92 standards. It features a single +12VDC bus that ensures 744 W power. The correlation of +12VDC bus and the maximal efficiency makes up 0.992. The PSU is able to operate within 100 V-240 V input voltage ranges at input current of 10A. It comes with OVP, OPP and SCP protection modules that promote for about 120.000 hours lifespan.

Set of Connectors

The DQ750 counts the following sockets and connectors:
— 24-pin Main Power features 1 demountable connector;
— 15-pin SATA features five connectors on three plaits;
— 8-pin SSI Processor features one demountable connector;
— 8-pin PCIe 2.0 VGA Power features four demountable connectors;
— 6-pin PCIe 1.0 VGA Power – no connectors;
— 4-pin 12V Power – no connectors;
— 4-pin Peripheral features four connectors;
— 4-pin Floppy Drive – no connectors.

Such set of connectors might be called unusual. The length of cables attached to the CPU power socket makes up 55 cm; this is just enough for full-tower cases with the top PSU localization and for the majority of mid-tower chassis with bottom PSU localization.

Cooling System

Optimal thermal condition of this power supply unit is supported by an integrated 140 mm D14SH-12 fan (Yate Loon Electronics). It is based on a slide bearing and might be accelerated up to 2800 RPM.

Key semiconductor elements (basic invertor and active PFC elements) are installed on standard-sized heatsinks without finning, whereas transistors of a synchronous rectifier found their places on a separate vertical plate without additional heat dissipation. All independent power converters of +3.3VDC and +5VDC channels are allocated on an affiliate plate with sockets. Due to such configuration, there is plenty of space within the case. This provides for the reduction of resistance to the airflow and simultaneous enhancement of cooling.

Efficiency and Noise

Testing results demonstrate that Deepcool DQ750 is able to gain more than 88% efficiency in the power range of 200 W- 750 W. The maximal recorded efficiency index equals to 90.5% at 500 W loading. This index steps down with the reduction of loading: on 50 W power conditions the unit performs at 72.7%.

Starting from 500 W power checkpoint, this unit becomes audible. Its noise level on the maximal loading approximates 50 dB. This index is hardly considered to be satisfactory, since the noise would definitely create a nuisance during operation.
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  • 01 December 2014, 18:50
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