Asus P7P55 LX JOOYON SI User Manual page 38

4. 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.
P7P55 LX ATX power connectors
• For a fully configured system, we recommend that you use a power supply unit (PSU)
• DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will
• If you are uncertain about the minimum power supply requirement for your system,
5. USB connectors (10-1 pin USB910, USB1112, USB1314)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specification that supports up to
480 Mbps connection speed.
P7P55 LX USB2.0 connectors
Never connect a 1394 cable to the USB connectors. Doing so will damage the motherboard!
The USB module cable is purchased separately.
1-26
P7P55 LX
that complies with ATX 12 V Specification 2.0 (or later version) and provides a minimum
power of 400 W.
not boot up.
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
P7P55 LX
USB1314
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
USB1112
PIN 1
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
USB910
PIN 1
PIN 1
Chapter 1: Product introduction