The Liberty series sports a new cable management feature named Eternity. On every one of the modular cables that contain 4-pin molex connectors there will be the same amount of SATA connectors and in total there are 8 molex connectors for the 500W model, so that means 8 SATA connectors, or a grand total of 16 connectors for drives and peripherals. On the 620W model there are 20 such connectors, 10 of each. Before you start jumping for joy thinking you can connect 16 drives and have 4 gazillian terabytes of data, you can’t. This is a 500W PSU after all.

Enermax recommend you only use 8 of the connectors at any one time, so essentially Eternity is simply a feature of flexibility. If you had a power supply with 8 molex and 4 SATA connectors but had 6 SATA drives you would have to buy some adaptors to power the last two drives. With the Liberty you can power all 6 SATA drives right from the box and you will probably never need to buy any additional adaptors. I’ll also point out that Enermax’s recommendation that you only connect eight drives is probably a conservative estimate.

All the cables come in a little pouch. This seems a good idea to me, as you’re less likely to loose a cable if you keep them altogether in something like this.

Inside you’ll find all the cables neatly stacked up. If you look closely you’ll notice the Eternity feature on some of the cables.

Here’s a close up of one of the Eternity cables. All the cables look like this one, with partial yellow and black braiding. The braiding is ok, nothing special. All the molex connectors are easy plug designs which are easier to get on and off, of which Enermax have filed patents on though it looks just like the plugs used on many other power supplies such as the Seasonic S12.

Delving inside we see a design similar to the Noisetaker series. It shares many of the same parts, most notably the transformer in the middle. Starting from top right we see the AC power converted to DC using a full wave bridge rectifier which is the yellow box to the right of the top heatsink. It may seem strange that the conversion of AC current to DC does not require cooling but that is the nature of this process, it is actually a very efficient part of the circuitry.

The current is then filtered with a DC filter choke (low pass filter) to rid any residual AC current, of which you can see at the bottom (the copper ringed doughnuts). From there, the current is stored in the pre-FET capacitor (bottom-left black MOSFET) which smoothes out charges and stores the current ready for the FET.

The FET (under the lower heatsink) feeds power to the primary side of the transformer. FET’s switch on and off at fast speed so to allow the correct amount of current to be fed to the transformer.  This is handled dynamically by the power supplies control circuitry and is constantly in flux. The charge is then passed through the primary and secondary side of the transformer where it is once again rectified at the final DC stage. It is then filtered once again with DC filter chokes which are situated under the top heatsink. Current is then once again stored in capacitors but these are always smaller than the initial capacitor at the pre-FET stage to allow for quick response times. You can see a few of them at the top middle, but there are more under the main power chord.

In this picture you can see the PCB which constantly gives feedback to the FET and a few of the DC filter chokes to the right.

Here we see the PCB for the modular plugs on the back of the power supply. It looks to be of high quality, which it would need to be.