Supero H8DM8-2, Руководство пользователя

Страница: 15 / 78

Chapter 1: Introduction
1-9
1-2 Chipset Overview
The H8DM8-2/H8DME-2 serverboard is based on the nVidia MCP55 Pro/NEC
uPD720400 chipset. The nVidia MCP55 Pro functions as Media and Communica-
tions Processor (MCP). Controllers for the system memory are integrated directly
into the AMD Opteron processors.
MCP55 Pro Media and Communications Processor
The MCP55 Pro is a single-chip, high-performance HyperTransport peripheral con-
troller. It includes a 28-lane PCI Express interface, an AMD Opteron 16-bit Hyper
Transport interface link, a six-port Serial ATA interface, a dual-port Gb Ethernet
interface, a dual ATA133 bus master interface and a USB 2.0 interface. This hub
connects directly to CPU#1 and through that to CPU#2.
NEC uPD720400
This I/O bridge chip provides one PCI-Express x8 upstream port and two PCI-X
domains. Each bridge supports PCI masters that include clock, request and grant
signals. This hub is connected to the MCP55 Pro and also interfaces directly with
the Adaptec SCSI controller.
HyperTransport Technology
HyperTransport technology is a high-speed, low latency point to point link that was
designed to increase the communication speed by a factor of up to 48x between
integrated circuits. This is done partly by reducing the number of buses in the
chipset to reduce bottlenecks and by enabling a more effi cient use of memory in
multi-processor systems. The end result is a signifi cant increase in bandwidth
within the chipset.