Datasheet

Intel
®
E8870 Scalable Node Controller (SNC) Datasheet 1-1
Introduction 1
1.1 Overview
The Intel
®
E8870 chipset delivers new levels of availability, features and performance for servers.
It provides flexible common modular architecture support for the Intel
®
Itanium
®
2 processors.
The Intel E8870 chipset supports up to four processors, and up to eight processors with the
Scalability Port Switch (SPS) component, delivering stability to the platforms through reuse and
common architecture support.
The component names used throughout this document refer to the component markings listed in
Table 1-1.
1.2 Scalable Node Controller (SNC) Overview
The SNC is the processor system bus interface and memory controller for the E8870 chipset. It
supports the Itanium 2 processors, DDR SDRAM main memory, a firmware hub interface to
support multiple firmware hubs, two scalability ports (SPs) for access to I/O and coherent memory
on other nodes.
The SNC may be connected to a SPS for scaling to large systems as shown in Figure 1-1. The SNC
is connected directly to an SIOH for single-node system implementations.
Table 1-1. Chipset Component Markings
Component Name Product Marking
SNC E8870
SIOH E8870IO
SPS E8870SP
DMH E8870DH
P64H2 82870P2
ICH4 82801DB
FWH 82802AC