Articles: Cases/PSU

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This is a roundup of five power supplies from Enermax, a well-reputed brand among experienced users. These PSUs fall into two groups. One group includes the rather old and well-known models manufactured under the trademarks of Galaxy, Infiniti and Liberty. Two of them were covered by our reviews one and two years ago. And the other group includes products from the new MODU82+ and PRO82+ series. We have actually tested aMODU82+ PSU not that long ago, but we return to this series in this review for the sake of comparison with PRO82+ which, according to the manufacturer, has the same characteristics but costs less due to the lack of detachable cables.

Testing Methodology

Click the following link for a description of our testing methodology and equipment and a brief explanation of what the specified and tested parameters of power supplies mean:  X-bit Labs Presents: Power Supply Units Testing Methodology In-Depth. If you feel overwhelmed with the numbers and terms this article abounds in, check out an appropriate section of the mentioned article for explanation.

You can also go to our Cooling/PSU section to check out reviews of other PSU models we have had in our lab.

Enermax Galaxy DXX EGX850EWL (850W)

This PSU comes in a huge colorful box.

Especially impressive is the text on the box informing you that the PSU can power up four CPUs, four cores in each CPU, five graphics cards, and 24 hard disk drives. I don’t want to question this fact (especially as the tiny text nearby says that it’s just a possibility while the reality depends on the power consumption of specific components), but I do wonder if this PSU is necessary for a system including far fewer CPUs, graphics cards and HDDs.

There are two smaller boxes inside: one contains the PSU proper and the other contains detachable cables, a mains cord, a user manual and small accessories such as screws, stickers, etc.

The PSU is up to the dimensions of the box, measuring 220 millimeters in length (75 millimeters more than a standard ATX unit). Well, the mention of five graphics cards and two dozen HDDs should have already made it clear that the Galaxy DXX is not for cramped system cases.

Besides the On/Off switch and mains connector, there is a two-color LED on the external panel. It reports the status of the PSU: normal operation, activated protection or fan failure. There is also a rather loud tweeter for the last two situations, so you are sure to get informed when the fan of your Galaxy DXX stops for some reason. The square button next to the LED is for resetting the protection.

The PSU is modular with detachable cables (besides a few fixed cables that are always used in any PC). The connectors differ in color and keys, so you won’t be able to plug anything wrong.

Despite its huge dimensions, the PSU has high component density due to the large heatsinks and a couple of transformers. The latter are used in parallel rather than as two independent sub-PSUs as in the Thermaltake Toughpower W0133 or Corsair HX1000W. The PSU has active PFC (its choke is in the top of the photograph, to the right of the two large capacitors) and dedicated voltage regulation (the group of chokes in the bottom of the photo).

There is a third, smaller, transformer next to the two large ones. It is covered with a white plate from above. This is a transformer of the standby 5V source. Although Enermax puts an emphasis on it in the marketing materials, calling the Galaxy DXX a “triple-transformer PSU,” I have to say there is nothing special about it. Every ATX-compliant power supply has a standby source and, accordingly, a similar transformer.

The high-voltage rectifier uses capacitors from Hitachi. JP CE-TUL capacitors are installed at the PSU’s output.

I could find no fault with the Galaxy DXX as concerns the soldering or mounting of large components, from chokes to wires.

The PSU has an original cooling system with one large 135mm fan (RL4T B1352512MB-3M model from Globe Fan) and one 80mm fan (SuperRed CHA8012DB-OA model from Cheng Home Electronic).

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