Chapter 2
P5I915PL
7
Hard Disk LED Connector (HDD_LED)
The connector connects to the case’
s IDE indicator LED indicating the activity status of IDE
hard disk. The connector has an orientation. If one way doesn’
t work, try the other way.
Reset Switch (RESET)
The connector connects to the case’
s reset switch. Press the switch once, the system
resets.
ATX 12V Power Supply Connector & Power Switch (POWER Switch)
The power switch (POWER SW) should be connected to a momentary switch. When
powering up your system, first turn on the mechanical switch of the power supply (if one
is provided), then push once the power switch. When powering off the system, you
needn’
t turn off the mechanical switch, just push once the power switch. P5I915PL series
mainboard only support ATX12V power.
Note: please pay attention to orientation and sequence of pins when using 20 pins ATX
power supply connector
POWER SW
ATX Power Supply Connector
1
-5V/NC
PWR OK
+5VDC
PS-ON
COM
+3.3VDC
+12VDC
12V
12V
GND
GND
+12V
Power Supply Connector
1
COM
5VSB
COM
+3.3VDC
COM
COM
COM
+5VDC
+3.3VDC
+5VDC
+5VDC
+12VDC
+3.3VDC
-12VDC
COM
+5VDC
COM
Dual channel introduce
DIMM1
DIMM2
To using dual channel DDR, DIMM1/DIMM2 is a combination.The following fig-
ure illustrates the dual channel DDR installation:
1. two same memory
DIMM1
DIMM2
