Intel 5520 And 5500 I/O Hub (Ioh); Intel ® Quickpath Interconnect; Pci Express* Ports; Table 1. Ioh High-Level Summary - Intel BB5520UR Technical Product Specification

Functional Architecture
3.1 Intel 5520 and 5500 I/O Hub (IOH)
®
®
The Intel 5520 and 5500 I/O Hub (IOH) in the Intel
S5520HCT provide a connection point between various I/O components and Intel
processors, which includes the following core platform functions:
• ®
Intel QPI link interface for the processor subsystem
•

PCI Express* Ports

•
Enterprise South Bridge Interface (ESI) for connecting Intel
•
Manageability Engine (ME)
•
Controller Link (CL)
•
SMBus Interface
®
•
Intel Virtualization Technology for Directed I/O (Intel
The following table shows the high-level features of the Intel
IOH SKU Intel QPI Ports
®
5520 2
5500 2
3.1.1 Intel
®
The Intel Server Boards S5520HC, S5500HCV and S5520HCT provide two full-width, cache-
coherent, link-based Intel
®
connecting Intel QPI based processors. The two Intel
communication only and have the following main features:
Packetized protocol with 18 data/protocol bits and 2 CRC bits per link per direction
Supporting 4.8 GT/s, 5.86 GT/s, and 6.4 GT/s
Fully-coherent write cache with inbound write combining
Read Current command support
Support for 64-byte cache line size
3.1.2 PCI Express* Ports
®
The Intel 5520 IOH is capable of interfacing with up to 36 PCI Express* Gen2 lanes, which
support devices with the following link width: x16, x8, x4, x2, and x1.
®
The Intel 5500 IOH is capable of interfacing with up to 24 PCI Express* Gen2 lanes, which
support devices with the following link width: x16, x8, x4, x2, and x1.
All ports support PCI Express* Gen1 and Gen2 transfer rates.
For a detailed PCI Express* Slots definition in the Intel
and S5520HCT, see "3.5 PCI Subsystem."
20

Table 1. IOH High-Level Summary

Supported Processor
® ®
Intel Xeon Processor 5500 Series
® ®
Intel Xeon Processor 5500 Series
QuickPath Interconnect
®
®
QuickPath Interconnect interfaces from Intel
Intel order number E39529-013
Intel® Server Boards S5520HC, S5500HCV, and S5520HCT TPS
®
Server Boards S5520HC, S5500HCV and
®
®
5520 and 5500 IOH:
PCI Express*
Lanes
36
24
®
QPI link interfaces support full-width
®
Server Boards S5520HC, S5500HCV
®
QPI-based
®
ICH10R
VT-d)
Manageability
®
Intel Intelligent Power Node
Manager
®
Intel Intelligent Power Node
Manager
®
5520 and 5500 IOH for
Revision 1.8