In Figure 17, you can see the power supply label containing all the power specs.
As you can see, the manufacturer lists this unit as having four +12 V rails. Analyzing the circuit, we could clearly see four “shunts” (current sensors), matching the number of rails advertised by the manufacturer. See Figure 18.
The available +12 V rails are distributed like this:
- +12V1 (solid yellow wire): Main motherboard cable, SATA and peripheral power connectors
- +12V2 (yellow/black wire): The ATX12V/EPS12V cable
- +12V3 (yellow/blue wire): The video card power cable that is permanently connected to the power supply
- +12V4 (yellow/white wire): The video card power cable on the modular cabling system
This distribution is perfect, as it separates the CPU and the video card power cables on individual rails. However, if you have only one video card with two power connectors, we recommend that you use one connector from each available cable instead of using the two power connectors available on one of the cables.
Let’s now see if this power supply can really deliver 750 W.