Articles: Cases/PSU

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Enermax Galaxy DXX EGX1000EWL (1000W)

As opposed to the above-discussed Antec TruePower Quattro, the PSU from Enermax is cooled with two fans. The cooling system is rather non-standard with one 135mm and one 80mm fan.

It’s not the two fans but the huge size of the PSU that you notice first, though. Its length is 220 millimeters (the length of the standard ATX power supply is 145mm). So, if you decide on buying a Galaxy DXX, make sure beforehand that it will fit into your system case. You’ll need 270-300mm of free space between the rear panel and the optical drives in order to install this PSU with all its cables and connectors.

There are eight connectors for detachable cables on the rear panel: six for peripherals and two for graphics cards. The connectors have differently positioned keys, making it impossible to plug a wrong cable in.

The PSU features a dual-transformer design. To remind you, this design is employed only to keep within the desired form-factor. In many cases it is easier to accommodate two smaller transformers, half the total wattage each, instead of one large transformer for the full wattage. The dual-transformer design has neither advantages nor drawbacks in comparison with the traditional single-transformer one for the end-user.

The PSU features active PFC and dedicated voltage regulation. Both have become standard features for this class of PSUs.

The PSU has five “virtual” +12V lines with a combined current of 75A. The load capacity of the +5V standby source is high. It is usually no higher than 3A but the Galaxy DXX can provide a current of 6A across this rail.

The PSU is equipped with the following cables and connectors:

  • Mainboard cable with a 24-pin connector (60cm long)
  • CPU cable with a 4+4-pin connector (62cm)
  • CPU cable with an 8-pin connector (62cm)
  • Cable with one 6+2-pin graphics card connector (56cm)
  • Cable with one 6+2 and one 6-pin connector for the graphics card (56cm)
  • Additional mainboard cable with a Molex connector (57cm; this +12V power source is recommended by some mainboard manufacturers for SLI and CrossFire configurations)
  • Cable with three Molex connectors (46+15+15cm)
  • Cable with three SATA power connectors (48+15+15cm)
  • Cable of the PSU fan’s tachometer for connecting to the mainboard (82cm)
  • Two connectors for graphics card cables
  • Six connectors for peripherals

Included with the PSU are the following cables:

  • Additional CPU cable with a 4-pin connector (45cm; it is plugged into the 6-pin PSU connector intended for graphics card cables)
  • Two graphics card cables with 6-pin connectors (45cm)
  • Adapter from an 8-pin graphics card connector into a 6+2-pin connector (it is in fact the same 8-pin connector but with a detachable 2-pin section)
  • Two cables with two Molex connectors and one floppy drive plug on each (45+15+15cm)
  • Three cables with three Molex connectors on each (45+15+15cm)
  • Five cables with three SATA power connectors on each (45+15+15cm)

This abundance of cables is impressive indeed. You instantly recall the picture from the PSU box that explains what and how many devices you can attach to it:

Sixteen CPU cores (4 by 4), five graphics cards, 24 hard disk drives. I guess the marketing folk from Enermax have gone too excited about this PSU as to imagine PC systems that just do not exist. That’s what I wrote about in my previous report concerning 1000W power supplies – such PSUs are not yet really necessary even for top-end gaming configurations that require much less power.

Anyway, 1000W PSUs do exist and my job is to test them using an artificial 1000W load.

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