Intel Pentium 4 User Manual

Introduction
R
24 Intel
®
Pentium
®
4 Processor / Intel
®
850 Chipset Family Platform Design Guide
1.4 Platform Initiatives
1.4.1 Intel
®
850 Chipset
1.4.1.1 Rambus Direct RDRAM* Device Interface
The Direct RDRAM device interface provides the necessary memory bandwidth to obtain optimal
performance from the processor as well as a high-performance AGP graphics controller. The MCH
Direct RDRAM device interface supports 300 MHz, 400 MHz and 533 MHz operation, delivering
up to 3.2 GB/s of theoretical memory bandwidth using two Direct Rambus channels operating in
lock step. Coupled with the greater bandwidth, the heavily pipelined RDRAM technology
protocol, a substantially more efficient data transfer is achieved.
In addition to the RDRAM device performance features, this new memory architecture provides
enhanced power management capabilities. The powerdown mode of operation will enable Intel
850 chipset based systems to cost effectively support the suspend-to-RAM sleep state.
Industry leading DRAM vendors have agreed to develop RDRAM devices and module vendors
will be developing RDRAM Inline Memory Modules. Rambus RIMM* modules are
approximately the same form factor as SDRAM DIMMs.
The 64-Mb, 128-Mb and 256-Mb/288-Mb RDRAM technologies will be supported by Intel 850
chipset-based platforms.
1.4.1.2 Accelerated Graphics Port (AGP)
AGP is a high performance, component level interconnect targeted at 3D graphical display
applications. AGP is based on a set of performance extensions or enhancements to the PCI bus.
The Intel 850 chipset employs an AGP interface that is optimized for a point-to-point topology
using 1.5 V signaling in 4x mode. The 4x mode provides a peak bandwidth of 1066 MB/s.
For additional information, refer to the Accelerated Graphics Port Interface Specification,
Revision 2.0, which is located at the following URL: http://www.agpforum.org/specs_specs.htm
.
1.4.2 Intel
®
ICH2
1.4.2.1 Integrated LAN Controller
The ICH2 incorporates an integrated LAN Controller. Its bus master capabilities enable the
component to process high level commands and perform multiple operations, which lowers
processor utilization by off-loading communication tasks from the processor.
The ICH2 functions with several options of LAN connect components to target the desired market
segment. The 82562EH component provides a HomePNA 1Mbit/sec connection. The 82562ET
component provides a basic Ethernet 10/100 connection. The 82562EM component provides an
Ethernet 10/100 connection with the added flexibility of Alert on LAN*. More advanced LAN
solutions can be implemented with the 82550 or other PCI based product offerings.

Intel Pentium 4 Specifications

General

Brand	Intel
Model	Pentium 4
Category	Computer Hardware
Language	English