Chapter 2: Installation
USB Headers
Universal Serial Bus Headers
Pin Definitions (USB2/3)
Two additional USB2.0 head- ers (USB2/3) are included on the serverboard. These may be con- nected to provide front side access. A USB cable (not included) is needed for the connection. See the table on the right for pin definitions.
USB2
Pin # Definition
1+5V
2PO-
3PO+
4Ground
5Key
USB3
Pin # Definition
1+5V
2PO-
3PO+
4Ground
5No connection
Serial Ports
Serial Port Pin Definitions
(COM1/COM2)
The COM1 serial port is located under the parallel port and the COM2 header is located between
Pin # Definition
1DCD
2RXD
3TXD
4DTR
5Ground
Pin # Definition
6DSR
7RTS
8CTS
9RI
10NC
Fan Headers
The serverboard has nine fan head- ers, which are designated FAN1 through FAN9. Fans speed may be set to full or variable speed with a BIOS setting. See the table on the right for pin definitions.
Note: when using active heatsinks, FAN4 is for CPU1, FAN3 is for CPU2, FAN7 is for CPU3 and FAN8 is for CPU4.
Note: NC indicates no connection.
Fan Header
Pin Definitions
Pin# Definition
1Ground (Black)
2+12V/9V (Red)
3Tachometer
Note: Fan speed may controlled by a BIOS setting to change with system temperature. As a result, pin 2 may be either 12V or 9 V. See Chapter 4.
Chipset Fan Headers
Two additional fan headers, designat- ed nFAN1 and nFAN2, are included on the serverboard. nFAN1 and nFAN2 should be connected to the heatsinks on the MCP55 and 8132 (chipset) chips, respectively. See the table on the right for pin definitions.
Chipset Fan Headers
Pin Definitions
Pin# Definition
112V
2Ground
