SUPER MICRO Computer H8DMT user manual Serial Ports, Fan Headers, LAN1/2 Ethernet Ports

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.

Pin#	Definition	Pin#	Definition
1	DCD	6	DSR
2	RXD	7	RTS
3	TXD	8	CTS
4	DTR	9	RI
5	Ground	10	NC1

1. Note: NC indicates no connection.

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.

NOTE: The onboard fan speed is controlled by the CPU die temperature.

Pin#	Definition	Pin#	Definition
1	Ground	3	Tachometer for
			Fan
2	PWR (DC Speed	4	PWM (Pulse Width
	CTRL)		Modulation)

LAN1/2 (Ethernet Ports)

Two Gigabit Ethernet ports (designated LAN1 and LAN2) are located beside the COM 1port. 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.

2-11