11
3-2 Motherboard Internal Connectors
(1)
Power Connector (24-pin block): ATXPWR1
ATX Power Supply connector: This is a new defined 24-pin connector that
usually comes with ATX case. The ATX Power Supply allows using soft power
on momentary switch that connect from the front panel switch to 2-pins Power
On jumper pole on the motherboard. When the power switch on the back of the
ATX power supply turned on, the full power will not come into the system board
until the front panel switch is momentarily pressed. Press this switch again will
turn off the power to the system board.
** We recommend that you use an ATX 12V Specification 2.0-compliant power
supply unit (PSU) with a minimum of 350W power rating. This type has 24-pin
and 4-pin power plugs.
** If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the
20-pin power plug can provide at least 15A on +12V and the power supply unit
has a minimum power rating of 350W. The system may become unstable or may
not boot up if the power is inadequate.
** Please refer to Figure 1 for 20-pin power plug connection. Power plug and
motherboard power connectors has adopted key design to avoid installation
mistake through connection can be made easily if in the proper direction. If the
installation direction is incorrect and you make the connection by force both the
board and the power supply can be burned. Please see to it that the direction is
correct during installation.
Figure 1: 20-pin power plug Figure2: 24-pin power plug
Pin 1
ROW1 ROW2
24-Pin
ROW1 ROW2
Pin 1
20-Pin
PIN
ROW1 ROW2
1 3.3V
3.3V
2 3.3V
-12V
3 GND
GND
4 5V
Soft Power On
5 GND
GND
6 5V
GND
7 GND
GND
8 Power OK
-5V
9 +5V (for Soft Logic)
+5V
10
+12V
+5V
11
+12V
+5V
12 +3V
GND
