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2.7 Headers & Connectors
ATXPWR1: ATX Power Source Connector
For better compatibility, we recommend to use a standard ATX 24-pin power
supply for this connector. Make sure to find the correct orientation before plugging
the connector.
Pin
Assignment
13
+3.3V
14
-12V
15
Ground
16
PS_ON
17
Ground
18
Ground
19
Ground
20
NC
21
+5V
22
+5V
23
+5V
24
Ground
ATXPWR2: ATX Power Source Connector
The connector provides +12V to the CPU power circuit.
Note1: Before you power on the system, please make sure that both ATXPWR1 and ATXPWR2
connectors have been plugged-in.
Note2: Insufficient power supplied to the system may result in instability or the peripherals not
functioning properly. Use of a PSU with a higher power output is recommended when configuring a
system with more power-consuming devices.
H81MHP2/H81MGP2/H81MLP2
Pin
Assignment
1
+3.3V
2
+3.3V
3
Ground
4
+5V
5
Ground
6
+5V
7
Ground
8
PW_OK
9
Standby Voltage+5V
10
+12V
11
+12V
12
+3.3V
Pin
Assignment
1
+12V
2
+12V
3
Ground
4
Ground
13
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