Asus Pro WS W680-ACE User Manual page 22

5. Power connectors
These Power connectors allow you to connect your motherboard to a power supply.
The power supply plugs are designed to fit in only one orientation, find the proper
orientation and push down firmly until the power supply plugs are fully inserted.
Ensure to connect the 8-pin power plug, or both the 8-pin and 4-pin power plugs.
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The PCIE_6P_PWR provides additional power for your PCIe X16 slots.
1-10
We recommend that you use a PSU with a higher power output when configuring a
system with more power-consuming devices. The system may become unstable or
may not boot up if the power is inadequate.
For a fully configured system, we recommend that you use a power supply unit
(PSU) that complies with ATX 12 V Specification 2.0 (or later version) and provides a
minimum power of 350W.
If you want to use two or more high-end PCI Express x16 cards, use an appropriate
PSU which can supply the required power to ensure the system stability.
Chapter 1: Product Introduction