Intel ® 5520 I/O Hub (Ioh); Intel ® Quickpath Interconnect; Pci Express* Ports; Table 1. Ioh High-Level Summary - Intel SC5650HCBRP Product Specification

Intel® Server System SC5650HCBRP TPS
3.1 Intel 5520 I/O Hub (IOH)
®
®
The Intel 5520 I/O Hub (IOH) in the Intel
connection point between various I/O components and Intel
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
3.1.1 Intel
®
The Intel Server System SC5650HCBRP provides two full-width, cache-coherent, link-based
®
Intel QuickPath Interconnect interfaces from Intel
processors. The two Intel
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.
All ports support PCI Express* Gen1 and Gen2 transfer rates.
For a detailed PCI Express* Slots definition in the Intel
"3.5 PCI Subsystem."
Revision 1.2

Table 1. IOH High-Level Summary

Supported Processor
Intel Xeon Processor 5500 Series
® ®
QuickPath Interconnect
®
®
QPI link interfaces support full-width communication only and have
Intel order number E81443-002
®
Server System SC5650HCBRP provides a
®
®
36
®
5520 IOH for connecting Intel
®
Server System SC5650HCBRP, see
Functional Architecture
QPI-based processors, which
®
ICH10R
®
VT-d)
5520 IOH:
PCI Express*
Lanes
Intel Intelligent Power Node
®
Manager
Manageability
®
QPI based
23