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A New Design |
New Features |
Features & Benefits |
Technical Documentation
The Intel® 840 chipset was specifically designed to meet the needs of high performance multi-processor systems. The 840 chipset, together with the latest Intel® Pentium® III or Intel® Pentium® III Xeon® processors, provides new levels of performance, scalability, and end user productivity.
The Intel® 840 chipset utilizes the new modular design of the 800 family of chipsets. Like other 800 series chipsets, the 840 chipset has two core components:
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The 82840 Memory Controller Hub (MCH) differentiates the Intel® 840 chipset from other Intel® 800 series chipsets. The MCH provides graphics support for AGP 2X/4X, dual RDRAM* memory channels, and multiple PCI segments for high performance I/O. | |
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The 82801 I/O Controller Hub (ICH) utilizes Intel® Hub Architecture to make a direct connection to the MCH. The ICH supports 32-bit PCI, IDE controllers and dual USB ports. | |
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In addition to providing high performance, the Intel® 840 chipset was designed for scalability. Two components may be used with the core components:
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The 82806 64-bit PCI Controller Hub (P64H) supports 64-bit PCI slots at speeds of either 33 or 66 MHz. The P64H connects directly to the MCH using Intel Hub Architecture, providing a dedicated path for high performance I/O. | |
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For systems needing high RDRAM capacity, an 82803 RDRAM-based memory repeater hub (MRH-R) may be utilized. The MRH-R converts each memory channel into two memory channels for expanded memory capacity. | |
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 | Dual memory channels, operating in lock-step, provide up to 3.2 GB/s of memory bandwidth. |
| A 16-bit wide implementation of Intel Hub Architecture allows high performance concurrent PCI I/O with a P64H. |
| The Direct AGP port provides up to 1 GB/s of graphics bandwidth. |
| Supports processors using a 133 MHz system bus. |
| A prefetch cache, unique to the 840 chipset, allows highly efficient data flow and helps maximize system concurrency. |
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| 133 MHz system bus capability |
Supports latest Intel® processors |
| Intel® Hub Architecture with optional P64H |
800 MB/s of I/O bus bandwidth supports for fast drive access and high speed networks |
| AGP 4X capability |
1 GB/s of graphics bandwidth allows highest graphics performance on IA platforms |
| MRH-R (RDRAM based repeater hub) |
Extends RDRAM memory capacities and increases system scalability |
| Dual RDRAM channels |
Maximum memory performance (3.2 GB/s) |
| Prefetch Cache |
Maximizes system concurrency so that simultaneous processes do not impact system performance |
| Two USB ports |
Plug and Play |
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| Product |
Package |
| 82840 Memory Controller Hub (MCH) |
544 Ball Grid Array (BGA) |
| 82803 Memory Repeater Hub - RDRAM (MRH-R) |
324 Ball Grid Array (BGA) |
| 82806 64-bit PCI Controller (P64H) |
241 Ball Grid Array (BGA) |
| 82801 Integrated Controller Hub (ICH) |
241 Ball Grid Array (BGA) |
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| The 840 chipset may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized errata are available on request. |
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