Atx 12V Power Connector (8-Pin Block) : Atx12V1 - PerfecTron INS8143A User Manual

INS8143A industrial ATX MB
power supply and the power connectors from the motherboard both
adopt key designs to avoid faulty installation.
Figure1：20-pin power plug

(2) ATX 12V Power Connector (8-pin block) : ATX12V1

This 8-pin connector usually comes with an ATX Power Supply. The ATX
Power Supply fully supports the AMD AM3 processor and must include
this connector to support the extra 12V to maintain system power
consumption. Without this connector, the system can become unstable
due to insufficient power to the system.
Figure 2：24-pin power plug
Pin 1
22