In Figure 16, you can see the power supply label containing all the power specs.

click to enlarge
Figure 16: Power supply label.

This power supply uses a dual-rail design distributed like this:

• +12V1 rail (solid yellow wire): All connectors but the ATX12V.
• +12V2 rail (yellow with black stripe wire): ATX12V connector.

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

Now let’s see if this power supply can really deliver 400 W.