Gigabyte Superb 550P Power Supply Review

Power Distribution

In Figure 17, you can see the power supply label containing all the power specs.

Figure 17: Power supply label.

As you can see, according to the label this unit has two +12 V rails. Inside the unit the wires are really separated into two groups, and we could clearly see one current sensor (“shunt”) for each group and since the monitoring integrated circuit has over current protection (OCP) with two +12 V channels, this unit really has two +12 V rails. Click here to understand more about this subject.

The two rails are distributed like this:

• +12V1: All cables but the ATX12V/EPS12V.
• +12V2: ATX12V/EPS12V cable.

This is the typical rail distribution used on power supplies with two +12 V rails and it is good because it separates the CPU (ATX12V/EPS12V connector) from the video card.

Now let’s see if this power supply can really deliver 450 W.