Articles: Cases/PSU

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Chieftec A135 Series: APS-750C

The last product in this review belongs to the A135 series but differs from the above-discussed APS-550S not only with its wattage rating but also with the letter C at the end of the model name. What’s the practical difference then?

The PSU comes in a medium-sized box designed in Chieftec’s unified style.

Exterior and Interior Design, Cables and Connectors

As opposed to the gray APS-550S, the APS-750C is painted matte black. There are no other visual differences, except for the On/Off switch.

The interior is completely different, though. There are no similarities with the APS-550S. The component layout is different and the heatsinks are larger. This PSU has dedicated voltage regulation and there is a card with connectors for modular cables at the back. The real manufacturer of the PSU is the same, however. It is Sirfa.

The four connectors for graphics cards made it necessary for the manufacturer to allot two +12V lines to them in order to ensure sufficient load capacity. If you’ve got one top-end graphics card (a dual-processor one, for example), you should connect one of its power plugs to V3 and another to V4. This will help you avoid the situation when the PSU’s protection is triggered by overcurrent on an individual “virtual” line rather than by total overload.

A minor drawback is that the connectors’ keys allow plugging a HDD power cable instead of a graphics card cable. Be careful and match the color of the connectors: black with black and red with red.

  • Mainboard cable with a 24-pin connector (51 centimeters long)
  • CPU cable with a 4+4-pin connector (52 cm)
  • CPU cable with an 8-pin connector (51 cm)
  • Four connectors for graphics card cables
  • Four connectors for peripheral power cables

Included with the PSU are:

  • Two graphics card cables with one 6-pin connector on each (45 centimeters)
  • Two graphics card cables with one 6+2-pin connector on each (45 centimeters)
  • Two cables with three Molex connectors and one floppy-drive plug on each (45+16+16+16 cm)
  • Two cables with three SATA power plugs on each (45+16+16 cm)

This selection of connectors is overall good but I guess a 750W power supply should have longer cables, especially a longer CPU cable because the 52cm one may not be long enough in most system cases with a bottom PSU compartment. The manufacturer should also have included at least one more SATA cable into the box (perhaps instead of a PATA cable even).


The PSU can yield up to 650 watts across its +12V rail which is split up into four virtual lines.

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