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Chapter 2 Hardware Installation
Chapter 2
SMBus Connector
SMBus
The SMBus (System Management Bus) connector is used to connect SMBus devices. It is a
multiple device bus that allows multiple chips to connect to the same bus and enable each one
to act as a master by initiating data transfer.
GND
+3.3V_standby
SMBUS Data
SMBUS Clock
NC
SMBUS_Alert
1
2
5
6
ATX Power Connector
ATX power
Use a power supply that complies with the ATX12V Power Supply Design Guide Version 1.1.
An ATX12V power supply unit has a standard 24-pin ATX main power connector that must be
inserted into the 24-pin connector.
The power connector from the power supply unit is designed to fit the 24-pin connector in
only one orientation. Make sure to find the proper orientation before plugging the connector.
The system board requires a minimum of 300 Watt power supply to operate. Your system
configuration (CPU power, amount of memory, add-in cards, peripherals, etc.) may exceed the
minimum power requirement. To ensure that adequate power is provided, we strongly recom-
mend that you use a minimum of 400 Watt (or greater) power supply.
Important:
Insufficient power supplied to the system may result in instability or the add-in boards
and peripherals not functioning properly. Calculating the system’s approximate power
usage is important to ensure that the power supply meets the system’s consumption
requirements.
13
12
24
1
+3.3V
+3.3V
GND
+5V
GND
+5V
GND
PWR_OK
+5VSB
+12V
+12V
+3.3V
+3.3V
-12V
GND
PS_ON#
GND
GND
GND
NC
+5V
+5V
+5V
GND