Explanation of icon.
Processor connector for ATX motherboard
Function name:Processor connector for ATX motherboard

This is a power connector that supplies voltage of +12V for ATX motherboard. The number of poles is 4.

This is used to supply power to CPU.

The way of the pin assignment is as follows.

Pin. No
Output
1
COM
2
COM
3
+12V
4
+12V