Enermax ECO80+ 620 W Power Supply Review

Hardware Secrets Golden Award


Enermax ECO80+ 620 W (EES620AWT) features a magnetic bearing fan with batwing blades for ultra low noise – design that is being called “twister bearing” by the manufacturer – and promises up to 86% efficiency. Let’s see if it is really a good product.

The reviewed power supply is officially a 620 W power supply labeled at 40° C (which is great), and the product box says that it can handle up to 680 W peak. This is really nice to see, because some manufacturers would do the opposite, i.e., label the power supply with its peak power and then put in small letters on the box the real capacity with the word “continuous” after it. Kudos to Enermax.

Enermax ECO 80+ 620 W power supplyFigure 1: Enermax ECO80+ 620 W power supply.

Enermax ECO 80+ 620 W power supplyFigure 2: Enermax ECO80+ 620 W power supply.

ECO80+ power supplies do not have a modular cabling system like the Liberty ECO series from the same manufacturer. This allowed the reviewed unit to be very small, being only 5 ½” (140 mm) deep.

As mentioned it comes with this “twister bearing” fan on its bottom, which is a magnetic bearing fan with batwing blades. This bearing has a higher life-span and reduces noise a little bit (1-2 dBA), while the shape of the blades improves airflow by 20-30% and also helps reducing noise. The rounded shape of the air inlet, called AirGuard by Enermax, helps reducing noise as well.

Enermax ECO 80+ 620 W power supplyFigure 3: The “twister bearing” fan.

All cables have a nylon protection that comes from inside the power supply. The included cables are:

  • Main motherboard cable with a 24-pin connector (no 20-pin option).
  • One cable with two ATX12V connectors that together form one EPS12V connector.
  • One auxiliary power cable for video cards with one six-pin connector.
  • One auxiliary power cable for video cards with one six/eight-pin connector.
  • One SATA power cable with four SATA power connectors.
  • One peripheral power cable with three standard peripheral power connectors and one floppy disk drive power connector each.
  • One cable with two SATA power connectors and two peripheral power connectors.

The number of cables is enough for you to build a mainstream PC.

All wires are 18 AWG, which is the correct gauge to be used. All cables are long, measuring 22 3/64” (56 cm) between the power supply and the first connector on the cable, but then only 4” (10 cm) between each connector on the cable on cables that have more than one connector. We think that Enermax could give more space between the connectors.

Enermax ECO 80+ 620 W power supplyFigure 4: Cables.

Now let’s take an in-depth look inside this power supply.

Author: Gabriel Torres

Gabriel Torres is a Brazilian best-selling ICT expert, with 24 books published. He started his online career in 1996, when he launched Clube do Hardware, which is one of the oldest and largest websites about technology in Brazil. He created Hardware Secrets in 1999 to expand his knowledge outside his home country.

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