For demanding I/O and networking applications, PCI Express

interfaces attach a variety of Intel and third-party I/O solution

components and adapters directly to the MCH at throughput

speeds of up to 4 GB/second on each x8 interface, allowing I/O

to keep pace with the rest of the platform. The Intel E7520 MCH

has three x8 PCI Express interfaces which can each be bifurcated

into two x4 interfaces for additional configuration flexibility.

Available as the I/O controller hub for legacy I/O support, the

MB/second. For the most demanding storage data transfers and

support for optional third-party software RAID 0, 1 technology, the

Intel 6300ESB ICH integrates dual independent SATA controllers

with 32-bit PCI connectivity, each capable of up to 150

MB/second transfer rate. Four Hi-Speed USB 2.0 ports allow

easy I/O connection, while offering improved bandwidth

Controller Hub (ICH5R), the Intel 6300ESB ICH includes a PCI-X*

64/66 bus supporting up to four PCI-X 64/66 MHz devices.

through a point-to-point x8 or x4 PCI Express interface. Each hub

contains two bus segments that can be independently configured

to operate in PCI (33 or 66 MHz) or 64-bit PCI mode 1 (66, 100,

or 133 MHz), for either 32-bit or 64-bit PCI/PCI-X devices. In

addition, each Intel 6700PXH 64-bit PCI Hub integrates two PCI

standard hot plug controllers—one per PCI/PCI-X interface—and

can be independently configured up to two PCI-X 64/133 MHz

segments. The Intel 6700PXH 64-bit PCI Hub supports multiple

PCI-X slots and frequencies for high-bandwidth I/O connectivity.

Intel

®

E7520

Memory

Controller

Hub

I/O Controller Hub

Third-Party

Component

800 FSB

6700PXH

64-bit

PCI Hub

IOP332 I/O

Processor

PCI-X

PCI-X

Three Configurable x8 PCI Express* Interfaces

(each x8 can be configurable as two x4s)

x4 or x8

PCI Express

Slot

x4 or x8

PCI Express

Slot

x4 or x8

PCI Express

Slot

DDR2-400

DDR 333

DDR 266

OR

OR

PCI-X* 66

PCI-X 66

PCI 33

Figure 1. The Intel

configuration suits a wide range of price points

and unique application environments.