Biostar A55MD2 Owner's Manual download pdf (Page 14)

Motherboard Manual

2.7 Headers & Connectors

ATXPWR1: ATX Power Source Connector

This connector allows user to connect 24-pin power connector on the ATX power

supply.

Pin Assignment Pin Assignment

13 +3.3V 1 +3.3V

14 -12V 2 +3.3V

15 Ground 3 Ground

16 PS_ON 4 +5V

17 Ground 5 Ground

18 Ground 6 +5V

19 Ground 7 Ground

20 NC 8 PW_OK

21 +5V 9 Standby Voltage+5V

22 +5V 10 +12V

23 +5V 11 +12V

24 Ground 12 +3.3V

ATXPWR2: ATX Power Source Connector

This connector will provide +12V to CPU power circuit.

Pin Assignment

1 +12V

2 +12V

3 Ground

4 Ground

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.

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Biostar A55MD2 Owner's Manual Page 14