SOYO SY-P4I845PE Lite Quick Start Manual page 12

SY-P4I845PE Lite Quick Start Guide
Connect your power switch to this header (momentary switch type).
To turn off the system, press this switch and hold down for longer than 4 seconds.
Attach the ATX 12V Power cable to three connector. (This motherboard requires an ATX 12V power supply,
an AT and ATX power supply can NOT be used.)
When using the Power-On by PS/2 Keyboard function, please make sure the ATX power supply is able to
provide at least 720mA on the 5V Standby lead (5VSB).
PS. Power supply must be use ATX 12V specification.
A new superset of the original ATX power supply is now defined. Named "ATX 12V," this
new power supply is comprised of a standard ATX unit plus the following enhancements:
Increased +12 VDC output capability. Mother board components with unique
voltage requirements are increasingly expected to be powered via DC/DC
converters off the +12 VDC power supply output. This trend is due primarily to the
higher power conversion and transmission efficiencies of +12 VDC relative to +5
VDC or +3.3 VDC. ATX12V power supplies should be designed to accommodate
these increased +12 VDC current requirements and to address associated issues
such as cross-regulation, capacitive loading, transient surge tolerance, cable
voltage drop, and cooling.
New +12 V power connector. To enable the delivery of more +12 VDC current to the
motherboard, a new 4-pin receptacle/header combination--the + 12 V power
connector–has been defined. The presence of the +12 V power connector
indicates that a power supply is ATX12V; the absence of the +12 V power
connector indicates that a supply is ATX.
Please install the ATX power according to the following pin assignment:
ATX Power
12V
5V
5VSB 5V
PW-OK -5V
GND
GND
5V GND
GND
GND
5V
PS-ON
GND GND
3.3V
-12V
3.3V 3.3V
Power On/Off: PWRBT
ATX 12V Power Supply: ATX PW
Pay special care to the directionality.
12
Pin1 Pin3
COM +12VDC
COM +12VDC
+12V Power Connector