2-11
Chapter 2: Installation
Serial Ports
The COM1 serial port is located beside the VGA port. Refer to the motherboard layout
for the location of the COM2 header. See the table below for pin definitions.
Fan Headers
The H8DMT has four 4-pin proprietary fan headers. Each fan header supports one 4-pin
fans with PWM mode. See the table below for pin definitions.
LAN1/2 (Ethernet Ports)
Two Gigabit Ethernet ports (designated LAN1 and LAN2) are located beside the
COM1port. These Ethernet ports accept RJ45 type cables.
Dedicated LAN (Ethernet Port)
One Gigabit Ethernet (RJ45) port is located above the USB ports on the H8DMT-F/
H8DMT-IBXF serverboards as a Dedicated LAN port for IPMI use. This port is not
present on the H8DMT/H8DMT-IBX serverboards.
Pin# Definition Pin# Definition
1 DCD 6 DSR
2RXD 7RTS
3TXD 8CTS
4DTR 9RI
5 Ground 10 NC1
1. Note: NC indicates no connection.
NOTE: The onboard fan speed is controlled by the CPU die temperature.
Pin# Definition Pin# Definition
1 Ground 3 Tachometer for
Fan
2PWR (DC Speed
CTRL) 4PWM (Pulse Width
Modulation)