Thermaltake Purepower 500 W Power Supply Review

Power Distribution

In Figure 15, you can see the power supply label containing all the power specs.

Figure 15: Power supply label.

As you can see, the label says this unit has two +12 V rails. Even though internally the +12 V (yellow) wires are divided into two groups, there are no current sensors (“shunts”), so this unit does not have over current protection, which is a prerequisite for a group of wires to be considered a “rail.” Read our tutorial on this subject to understand more.

Figure 16: No current sensors (“shunts”), therefore no over current protection.

Now let’s see if this power supply can really deliver 500 W.