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Kingwin Mach I ABT-1000MA1S (1000)

Kingwin debuts in our reviews with this model.

The PSU comes in a compact and handy box with a carry handle.

Exterior Design

As opposed to Hiper, the developer here is generous as to the vent holes in the external panel of the PSU. I wouldn’t call it a distinguishing trait, though. The PSU is overall similar to most other models of its class.

The Kingwin has detachable cables that are connected to the PSU via threaded industrial connectors rather than popular Molex Mini-Fit Jr. The connectors’ pins are not separated, so an accidental touch of a metallic object may provoke a short circuit. Therefore the connectors are covered with silicone caps (shown in the bottom of the photo). The connectors have a different number of pins, so you can’t connect a wrong cable to them.

When a cable is connected, a blue rings start to glow around the corresponding connector. This is a rather beautiful and original solution for system cases with a transparent side panel. The fan has blue highlighting, too.

The PSU is equipped with the following cables and connectors:

  • Mainboard cable with a 24-pin connector (52cm)
  • CPU cable with a 4-pin connector (54cm)
  • CPU cable with an 8-pin connector (54cm)
  • Four connectors for graphics card cables
  • Four connectors for peripheral power cables

Included with the PSU are:

  • Two graphics card cables with one 6+2-pin connector on each (50cm)
  • Two graphics card cables with one 6-pin connector on each (50cm)
  • Two cables with four Molex connectors and one floppy-drive plug on each (50+15+15+15+15cm)
  • Two cables with four SATA power plugs on each (50+15+15+15cm)

This is a perfectly standard selection of cables, but I wish there were one extra cable with SATA connectors included into the kit. The user would be able to choose what is necessary for his particular system then. Considering that one SATA cable is usually taken by the optical drive, such a cable might have only two or three connectors.

Interior Design

The PSU has a standard circuit design with one power transformer, active PFC, and dedicated voltage regulation based on magnetic amplifiers.

The PSU employs Pce-tur capacitors. They are average quality components.

Specifications

The specs are perfectly standard for a modern 1000W power supply. The PSU can yield almost all of its output power via the +12V rail.

There is a funny sticker on the PSU showing the dependence of the fan speed on temperature as a graph. This “new design” is long used in all PSUs from all brands. And it is also unclear what temperature is shown in the graph. The controller’s thermal sensor is usually attached to one of the PSU’s heatsinks and it is quite normal for a heatsink to be 50 or 60°C hot. And even if this is the air temperature, I don’t think it can be lower than 25-30°C inside a computer that consumes so much power whereas the graph starts, most optimistically, from zero!

UPS Compatibility

Together with my APC SmartUPS SC 620 this power supply worked at loads up to 340W when powered by the mains and 330W when powered by the batteries. They switched to the batteries normally and the UPS was stable.

Output Voltage Stability

The PSU delivers absolutely stable voltages. The voltages do not deflect more than 4% at any load (and the +5V and +12V voltages keep within a 3% deflection even).

Output Voltage Ripple

The Kingwin Mach I has a rather strong high-voltage pulsation on the +12V rail, yet it is within the permissible limits.

Noisiness

The PSU is cooled by a 135x135x25mm fan from Globe Fan. A part of the fan is covered with celluloid film with perforation on the right – that’s not a good solution in terms of noisiness.

The low speed of the fan makes up for that, though. The fan is rotating at only 830rpm even at a load of 700W, making the Mach I a very quiet power supply. Of course, the downside is that the temperature of the air passing through the PSU may grow by as many as 18°C. I didn’t spot any overheat-related problems during my tests of this PSU, though.

Efficiency and Power Factor

The efficiency is quite normal for this class of PSUs: it goes higher than 80% at a load of 140W, reaches a maximum of 87% and declines to 83% at full load. The power factor is higher than 0.99 through most of the diagram.

Standby Source

The standby source is rated for a current up to 5A but barely copes with the job. The voltage bottoms out to the allowable minimum of 4.75V under full load.

Summary

Summing it up, the Kingwin Mach I is a good high-wattage power supply that is quieter than most of its opponents and has beautiful connectors for detachable cables. Its electrical parameters are all right. So, if you’ve got a system case with translucent side panel and are fond of blue highlighting, you may like the Mach I.

 
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