In Win Commander II 850 W Power Supply Review

Power Distribution

In Figure 18, you can see the power supply label containing all the power specs.

Figure 18: Power supply label

This power supply is sold as having four +12 V rails, which is correct, since this unit has four +12 V over current protection circuits (see previous page), and we could clearly see one “shunt” (current sensor) for each +12 V “rail.” See Figure 19. Click here to understand more about this subject.

Figure 19: Shunts

The four +12 V rails are distributed as follows:

• +12V1: Main motherboard cable and the SATA and peripheral power connectors
• +12V2: The video card power cable that is permanently attached to the power supply and the ATX12V cable
• +12V3: One of the video card power connectors on the modular cabling system
• +12V4: The EPS12V connector, the other video card power connector on the modular cabling system

This distribution is adequate.

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