Asus P7H55-M LX USB3 User Manual page 21

6. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
These connectors are for an ATX power supply. The plugs from the power supply are
designed to fit these connectors in only one orientation. Find the proper orientation and
push down firmly until the connectors completely fit.
P7H55-M LX/USB3
P7H55-M LX/USB3 ATX power connectors
• We recommend that you use an ATX 12V Specification 2.0-compliant power supply unit
• If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the 20-pin
• DO NOT forget to connect the 4-pin ATX +12 V power plug; otherwise, the system will
• We recommend that you use a PSU with higher power output when configuring a
• If you are uncertain about the minimum power supply requirement for your system,
ASUS P7H55-M LX/USB3
(PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin power
plugs.
power plug can provide at least 15 A on +12 V and that the PSU has a minimum power
rating of 300 W. The system may become unstable or may not boot up if the power is
inadequate.
not boot up.
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.
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
ATX12V EATXPWR
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
GND
PIN 1
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
1-12