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Chapter 4: Motherboard Connections
Chapter 4
Motherboard Connections
This section describes the connections on the motherboard and provides pinout definitions.
Note that depending on how the system is configured, not all connections are required. The
LEDs on the motherboard are also described here. A severboard layout indicating component
locations may be found in Appendix B.
Please review the Safety Precautions in Chapter 3 before installing or removing components.
4.1 Power Connections
Two power connections on the X11SPi-TF must be connected to the power supply. The wiring
is included with the power supply.
•
24-pin Primary ATX Power (JPWR2)
•
8-pin Processor Power (JPWR1)
Main ATX Power Connector
The 24-pin power supply connector (JPWR2) meets the ATX SSI EPS 12V specification.
You must also connect the 8-pin (JPWR1) processor power connector to the power supply.
Important:
To provide adequate power to the motherboard, connect the 24-pin
and
the 8-pin
power connectors to the power supply. Failure to do so may void the manufacturer's warranty
on your power supply and motherboard.
ATX Power 24-pin Connector
Pin Definitions
Pin#
Definition
Pin#
Definition
13
+3.3V
1
+3.3V
14
-12V
2
+3.3V
15
Ground
3
Ground
16
PS_ON
4
+5V
17
Ground
5
Ground
18
Ground
6
+5V
19
Ground
7
Ground
20
Res (NC)
8
PWR_OK
21
+5V
9
5VSB
22
+5V
10
+12V
23
+5V
11
+12V
24
Ground
12
+3.3V
Required Connection
