Intel I/O Controller Hub 9; Pcie Gen2; Direct Media Interface; Pcie Mezzanine Connectors - Dell PowerEdge M710HD Technical Manual

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8.5 Intel I/O Controller Hub 9

The Intel I/O Controller Hub 9 (ICH9) is a highly integrated I/O controller supporting the following
functions:

Six x1 PCIe Gen1 ports with the capability of combining ports 1-4 as a x4 link

PCI Bus 32-bit Interface Rev 2.3 running at 33MT/s

Serial ATA (SATA) ports with transfer rates up to 300MB/s (M710HD does not support SATA)

Six UHCI and two EHCI (high-speed 2.0) USB host controllers with up to 12 USB ports (M710HD
uses three of these ports for internal and external use)

Power management interface (ACPI 3.0b compliant)

Platform Environmental Control Interface (PECI)

I/O interrupt controller

SMBus 2.0 controller

Low Pin Count (LPC) interface to Trusted Platform Module (TPM)

Serial Peripheral Interface (SPI) support for up to two devices

8.6 PCIe Gen2

PCIe is a serial point‐to‐point interconnect for I/O devices. PCIe Gen2 doubles the signaling bit rate
of each lane from 2.5 Gb/s to 5 Gb/s. Each of the PCIe Gen2 ports is backwards‐compatible with
Gen1 transfer rates.

8.7 Direct Media Interface

The Direct Media Interface (DMI) connects the Boxboro‐EX Legacy IOH with the Intel I/O Controller
Hub (ICH). The DMI is equivalent to a x4 PCIe Gen1 link with a transfer rate of 1 GB/s in each
direction.

8.8 PCIe Mezzanine Connectors

The M710HD supports two x8 PCIe Gen2 mezzanine connectors.
PowerEdge M710HD Technical Guide

M710HD PCIe Assignments

Table 8.
Port Number
Port 0
Port 1-2
Port 3
Port 4
Port 5-6
IOH
Port 7-8
Port 9-10
x4 Port 1-4
ICH9 x1 Port 5
x1 Port 6
M710HD
ESI
H200
NDC connection
Not Used
FAB B
FAB C
Unused
Unused
Unused
and SPI-VU
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