Atx Power Connectors (24-Pin Eatxpwr, 4-Pin Atx12V); Speaker Connector (4-Pin Speaker) - Asus H81M-A User Manual

5.

ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)

These connectors are for ATX power supply plugs. The power supply plugs are
designed to fit these connectors in only one orientation. Find the proper orientation and
push down firmly until the connectors completely fit.
H81M-A
H81M-A ATX power connectors
• We recommend that you use an ATX 12V Specification 2.0-compliant power supply
unit (PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin
power plugs.
• DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will
not boot up.
• We recommend that you use a PSU with higher power output when configuring a
system with more power-consuming devices or when you intend to install additional
devices. The system may become unstable or may not boot up if the power is
inadequate.
• If you are uncertain about the minimum power supply requirement for your system,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
6.

Speaker connector (4-pin SPEAKER)

The 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you to hear system beeps and warnings.
H81M-A
H81M-A Speaker Out Connector
ASUS H81M Series
ATX12V
EATXPWR
+3 Volts GND
+5 Volts
+12 Volts
+12 Volts +5 Volts
+5V Standby +5 Volts
Power OK -5 Volts
PIN 1 GND GND
+5 Volts GND
GND GND
+5 Volts PSON#
GND GND
+3 Volts -12 Volts
+3 Volts +3 Volts
PIN 1
SPEAKER
PIN 1
1-17