Articles: Cases/PSU

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The most interesting part of the MODU82+ is its fan. It is a 120x120x25mm thing running on ball bearings. The actual manufacturer cannot be identified. Perhaps this model is manufactured specifically for Enermax. The photograph shows that there are four wires going from the fan’s motor: two for power, one for the tachometer, and one for fan speed control.

This is the peculiarity of the fan. Such fans are widespread in the world of CPU coolers, but the MODU82+ is the first PSU in our labs to have a controlled fan.

Well, the speed of a typical 2- or 3-pin fan can be varied, too, by changing the supply voltage, but the advantage of 4-pin fans is that they offer a far broader adjustment range. Their minimum speed can be only 20-30% from the rated one or even less!

The ends of the fan’s blades are folded in a special way, but I am not as versed in aerodynamics as to comment knowingly upon the practical value of this folding.

But let’s get back to the PSU. It is equipped with the following cables and connectors:

  • Mainboard cable with a 24-pin connector (56cm)
  • CPU cable with a 4-pin connector (57cm)
  • CPU cable with an 8-pin connector (57cm)
  • Cable of the fan’s tachometer (45cm)
  • Two connectors for graphics card cables
  • Five connectors for power cables of hard and optical drives

Included with the PSU are:

  • Two graphics card cables with two 6+2-pin connectors on each (52cm)

  • Three cables with three SATA power connectors on each (45+10+10cm)
  • One cable with three Molex connectors and one floppy-drive plug (45+10+10+10cm)
  • One cable with three Molex connectors (45+10+10cm)

Thus, this PSU can work with two premium or four mainstream graphics cards if they have no more than four power connectors in total. Each of the PSU’s PCIe cables splits into two connectors at the end, which is enough to connect two cards installed in neighboring slots. Each of the four graphics card connectors is of the 8-pin variety (designed as 6+2 to be compatible with 6-pin connectors).

The PSU can yield 96% of its total 625 watts across the +12V rail divided into three “virtual” output lines, 25A (300W) each. This limitation of the maximum current allows connecting any modern graphics card, including a Radeon HD 4870 X2 that consumes up to 260W, to one +12V line.

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