1 “ Intel 820 Chipset ” Intel 820 Chipset A Revolutionary Architecture for Mainstream Performance PCs in 2000 By … Miss Taungthong Wattarujeekrit 4365010.

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“ “ Intel 820 Intel 820 Chipset ”Chipset ”

Intel 820 ChipsetA Revolutionary Architecture for

Mainstream Performance PCs in 2000

By…Miss Taungthong Wattarujeekrit 4365010Mr. Praditphong Soipetch 4365019

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Outline

Introduction and New Feature. Overview and Siblings Technology Background Low Pin Count Buses Chipset Architecture

82820 MCH 82801 ICH 82802 FWH

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Introduction Intel 820 chipset offers new

manageability and security features,and headroom for next-generation operating systems , application and processors.

Two major new technologies AGP4x for graphic and multimedia Direc Rambus memory which double

bandwidth in the critical areas of graphics and memory.

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Introduction(Con)

Five major initiatives reflected in the 820 chipset.

Stable platforms. Constant computing Rich content delivery Platform security Manageability

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The 820 Chipset:Overview & Siblings

820 Chipset designed to be platform of choice for the Pentium III processor.

Supporting the higher-bus bandwidths and clock frequencies that this processor will deliver over is predecessor.

820 chipset support all desktop computing in 2000.

Intel have 3 new platform chipset for user:810E ,820 and 840 .

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Table1.Intel’s new platform chipsets.

Chipset Intel 810E chipset Intel 820 chipset Intel 840 chipset

System cost Low

Mainstream;platform

longevity and stability Premium

Defining features

Integrated

graphics;cost

Performance;platform

longevity and stability Workstation

Maximum

processors 1 2 2

Memory

100 MHz SDRAM

(PC100)

1 RDRAM channel

(PC600/PC700/PC800)

2 RDRAM channels

(PC600/800)

Target processor

Intel Celeron

Processor

Pentium III processor

(1 or 2)

Intel Pentium III

Xenon processor (1 or 2)

Intel Pentium III

processor

Pentium III processor

(1 or 2)

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The 820 Chipset:Overview & Siblings 820 Chipset used high-speed low pin

count buses. This new architecture has double the

aggregate bandwidth of it predecessor for intel 440 BX chipset in every critical area.

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Technology Background The 820 chipset incorporate four highly

controlled circuits or buses Processor system bus (PSB) Direct Rambus memory interface AGP4x Hub interface

These buses are easily scaled by advancing their clock frequency , while their physical simplicity reduces the design challenges.

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Table 2. The performance of the buses in the 820 chipset

BandwidthEffective transfer rate Type Feature

Processor System Bus1GB/sec 133MHz Multidrop GTL+

Direct Rambus 1.6GB/sec 400MHz Controlled bus Low voltage

AGP4x 1GB/sec 133MHz Point-to-point Low voltage

Hub interface 266MB/sec 266MHz Point-to-point Active matching

LPC 4MB/sec 33MHz Multidrop

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Electrical Integrity:Summary The 820 chipset incorporates the following

advances to contain the challenges of Maxwell’s equations. Hub Interface:A reduced pin count high-integrity bus

for system interconnection. Direc Rambus for memory interconnect Advanced cabling for ATA-66 hard drive interconnect A new 1.5V signal level for AGP4x.

This enchancements increase reliability and performance while lowering system cost.

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The Bandwidth Challenge

As processor technology advances,both clock rates and work performed per clock cycle will increase.

So that 820 chipset outputforms its predecessor is increase ,show on Table3.

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Table3. System bandwidth comparison between Intel 820 and 440 chipset.

Intel 440 BX chipset MB/sec Intel 820 chipset MB/sec

PSB

Intel Pentium II

processor 66-100 512-768

Intel Pentium III

processor 133 1,024

Graphics AGP2x 533AGP4x 1,066

Memory 100MHz SDRAM 800DRDRAM 1,600

Bridge bus PCI 133Hub interface 266

HDD ATA-33 33ATA-66 66

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Validating Bandwidth Headroom

Figure1 Shows the relative results of this test when run on the Intel 440BX chipset platform and the Intel 820 chipset platform

The result: Intel 820 chipset have more B/W to access headroom than Intel 440BX about 2.26 time.

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Figure 1: Intel Platform Bandwidth Test

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2.26

0

0.5

1

1.5

2

2.5

Intel Pentium III

processor 600/100 Intel

440BX chipset platform

Intel Pentium III

processor 600/133 Intel

820 chipset platform

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Low Pin Count Buses Table4. Hub interface 8-pin count

Function Pins Comment

Data bits 8

Strobe 2

Differential signal supports 266MHz

transfer rate

Control 3

Includes optional (not implemented

in 820) parity signal

Trac matching 1 Matches signals to circuit board

Hubref 1 Signal voltage reference

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The intel 820 chipset system architecture

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Chipset Architecture

Intel ‘s new 820 chipset consist of three components: A memory controller hub (MCH,82820

) I/O controller hub (ICH, 82801 ) Firmware hub( FWH,82802)

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Chipset Architecture

The Hub architecture,high-speed buses also save pins.

820 chipset has a total of 565 pins between its two major components ,compared with 816 on 440BX.

So that manufacturing cost will be reduce and increased reliability.

No bottle-neck from PCI protocol

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Figure2. The intel 820 chipset system architecture details.

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Table 4. Hub interface 8-pin count

Function Pins Comment

Data bits 8

Strobe 2

Differential signal supports 266MHz

transfer rate

Control 3

Includes optional (not implemented

in 820) parity signal

Trac matching 1 Matches signals to circuit board

Hubref 1 Signal voltage reference

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82820 MCH (Memory Controller Hub)

33 pin PC600, PC700, PC800

Buffer support AGP2x

Total Bandwidth 3.9 GB/sec

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The 82802 FWH (Firmware Hub)

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The 82802 Firmware Hub(FWH)

The firmware hub incorporates system features that have no external interface.

FWH includes 2 category. Flash Memory : its is boot flash memory for

the system , and is available in both 4 Mb(512KN) and 8 Mb(1MB) configurations.

Intel Random Number Generator (RNG):It is the great challenges to any secure system is the proper generationkeys.

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Same south bridge in 440BX, but performs the higher bandwidth of the hub interface so that performance will be increase.It have a lot of feature

Alert on LAN (AOL) Chassis Intrusion Processor Not Present Custom Messages Watchdog Timer Thermal Event Monitor

The 82801AA I/O Controller Hub(ICH)

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ATA-66 AC’97(Audio Interface) Legacy I/O USB

SMBus and GPIO PCI Bus Interface

The 82801AA I/O Controller Hub(ICH)

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Conclusion

In summary, the Intel 820 chipset provides bandwidth and headroom to support a new generation of productiv-ity applications, and offers substantial performance gains on media-rich applications today.