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Enermax Liberty DXX ELT500AWT (500W)

We already tested a Liberty series PSU in our labs. That was the 620W ELT620AWT model without the suffix DXX in its name. According to Enermax, this suffix denotes the support for graphics cards with 8-pin power connectors.

The text on the compact box informs you about the capabilities of the PSU: it can support two quad-core CPUs, two graphics cards, and a whole lot of hard disks. As usual, it depends on what exactly components you use: a couple of GeForce GTX 260 will need about 280W and a couple of top-end CPUs will need some 200W more from the same +12V rail… Anyway, the Liberty DXX should be quite enough for a system with one CPU, one graphics card (of any category), and a few HDDs.

The PSU looks like the Infiniti series models. It has the same housing but is painted black. There is no LED indicating the PSU’s status and the fan grid has become somewhat different. That’s all the external difference, actually.

The Liberty DXX seems to resemble the Infiniti inside, except that the heatsinks are painted gold rather than black now (the color of the heatsinks is unimportant at temperatures of a few tens of degrees and with active cooling; this is just the manufacturer’s aesthetic choice). However, significant differences can be seen at closer inspection.

The main difference is that one toroidal choke is missing at the PSU’s output. There were three of them in the Infiniti and only two in the Liberty. This means the lack of dedicated voltage regulation. To be exact, the +3.3V rail still has a dedicated regulator but the +5V and +12V rails share one regulator.

Talking about the quality of Enermax Liberty power supplies, I have to recall the defect described at the forum: the ferrite rings used to be fastened on the legs of the FETs with glue which eventually became conductive due to the constant exposure to high temperature. As a result, the PSU would have a short circuit and fail.

So I took my flashlight and scrutinized my sample of the Liberty DXX and found no trace of the pernicious glue. The ferrite rings are still in their places, and there is some glue inside them (or lacquer – you can’t be sure unless you unsolder the transistors and remove the rings from them) but it is a different color than in the photos from and doesn’t flow out. I also checked out the other PSUs reviewed in this article and found no glue bridges in them, either. So, the manufacturer seems to have successfully solved the problem.

A Hitachi capacitor is installed at the PSU’s input. A JP CE-TUR capacitor is at the output.

The back panel offers eight connectors for detachable cables: six for optical and hard drives and two for graphics cards. The connectors differ in color and keys, preventing you from plugging anything wrong.

The PSU is cooled by the 135mm fan from Globe Fan that we have already seen in the above-discussed models. Despite the translucent impeller, the fan lacks highlighting. But it has a velocity sensor which can be connected to your mainboard’s fan connector (you won’t be able to control the speed of the fan, though).

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