LEPA G700-MA Power Supply Review

Power Distribution

In Figure 19, you can see the power supply label containing all the power specs.

Figure 19: Power supply label

This power supply is sold as having three +12 V rails, which is correct, since this unit has three +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 20). Click here to understand more about this subject.

Figure 20: Shunts

The three +12 V rails are distributed as follows:

• +12V1: Main motherboard cable, ATX12V, and EPS12V connectors
• +12V2: The two peripheral connectors of the modular cabling system that are close to the video card power connectors, and two of the video card power connectors
• +12V3: The first three peripheral connectors of the modular cabling system, and two of the video card power connectors

This distribution is perfect, as it keeps the CPU (ATX12V/EPS12V connectors) and the video cards in separate rails.

There is one interesting point. Each red connector of the modular cabling system, which is used to connect the video card power cable, is half connected to the +12V2 rail and half connected to the +12V3 rail. When using two video cards that require only one power connector each, the best method is to use only one cable. This way you are ensuring that one of the video cards is installed on the +12V2 rail, and the other one is installed on the +12V3 rail. If you use the two cables, you may end up connecting the two video cards on the same rail.

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