Chapter
1
Motherboard
Description
1-19
1.6.2 ATX 20-pin Power Connector: JATXPWR1
This connector supports the power button on-board. Using the ATX power
supply, function such as Soft Power Off is supported on this motherboard. This
power connector supports instant power-on functionality, which means that the
system will boot up instantly when the power connector is inserted on the board.
PIN Assignment PIN Assignment
1 +3.3V 11 +3.3V
2 +3.3V 12 -12V
3 Ground 13 Ground
4 +5V 14
PS_ON
5 Ground 15 Ground
6 +5V 16
Ground
7 Ground 17 Ground
8 PW_OK 18
-5V
9 +5V_SB 19 +5V
10 +12V 20 +5V
1.6.3 ATX 12V Power Connector: JATXPWR2
PIN Assignment
PIN Assignment
1 +12V 3
Ground
2 +12V 4
Ground
1.6.4 DIMM Power Voltage Selection: JDIMMPWR1
Pin
DDR DIMM Voltage
1-2
+2.55V (Default)
3-4
+2.65V
5-6
+2.75V
7-8
+2.85V
* It’s strongly recommended to set DDR DIMM voltage in default setting 2.55V.