Supermicro H8DMU+ User Manual download pdf (Page 15)

Chapter 1: Introduction

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1-2 Chipset Overview

The H8DMU+ serverboard is based on the nVidia MCP55 Pro chipset. The nVidia

MCP55 Pro functions as Media and Communications 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 single ATA133 bus master interface and a USB 2.0 interface. This hub

connects directly to CPU#1 and through that to CPU#2.

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.

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Supermicro H8DMU+ User Manual Page 15