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Universal Serial Bus
Headers
Three additional USB headers (USB2/
USB3 and USB4) are included on the
serverboard. These may be used for
front side access. A USB cable (not
included) is needed for the connec-
tion. See the table on the right for
pin defi nitions.
Serial Ports
The COM1 serial port is located on
the IO backplane. COM2 is a header
on the serverboard (see serverboard
layout for location). See the table on
the right for pin defi nitions.
Fan Headers
The X7DBU has fi ve eight headers,
designated Fan1 through Fan8. FAN5
through FAN8 are for 4-pin Pulse
Width Modulated (PWM) fans and are
to be connected to the CPU heatsink
fans. Their speed is controlled via
Thermal Management with a BIOS
setting. FAN1 through FAN4 are 3-
pin, non-PWM fans. See the tables
on the right for pin defi nitions.
Chapter 5: Advanced Serverboard Setup
Universal Serial Bus Headers
Pin Defi nitions (USB2, USB3, USB4)
USB2
Pin #
Defi nition
1
+5V
2
PO-
3
PO+
4
Ground
5
Key
Serial Port Pin Defi nitions
(COM1, COM2)
Pin #
Defi nition
1
DCD
2
RXD
3
TXD
4
DTR
5
Ground
Note: Pin 10 is included on the header but not on
the port. NC indicates no connection.
4-pin Fan Header
Pin Defi nitions
(FAN5-8)
Pin#
1
2
3
4
3-pin Fan Header
Pin Defi nitions
(FAN1-FAN4)
Pin#
1
2
3
5-15
USB3, USB4
Pin #
Defi nition
1
+5V
2
PO-
3
PO+
4
Ground
5
NC
Pin #
Defi nition
6
DSR
7
RTS
8
CTS
9
RI
10
NC
Defi nition
Ground (Black)
+12V (Red)
Tachometer
PWM Control
Defi nition
Ground (Black)
+12V (Red)
Tachometer
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