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Power Distribution

Figure 17 shows the power supply label containing all the power specs.

Enermax NAXN 82+ 550 W power supplyFigure 17: Power supply label

This power supply has two +12 V virtual rails, as we could confirm by the presence of two “shunts” (current sensors) and the presence of two +12 V over current protection channels. Click here to understand more about this subject.

The two +12 V rails are distributed as follows:

  • +12V1 (solid yellow wires): All cables, except the ATX12V/EPS12V
  • +12V2 (yellow/black wires): The ATX12V/EPS12V cable

This is the typical configuration used on power supplies with two rails.

How much power can this unit really deliver? Let’s find out.

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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.