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The Pentium® II processor, Intel’s highest performance processor, integrates the best attributes of the P6 microarchitecture processors—Dynamic Execution performance, a multi-transaction system bus, plus Intel’s media-enhancing MMX™ technology. Pentium II processors are targeted for professionals, avid PC users, and PC gamers, or the Enthusiast/Professional desktop users. In addition, they are targeted for mainstream home and business users, or the Performance desktop PC market. The Pentium II processor also meets the needs of entry-level to mid-range servers and workstations.
Discover how Pentium II processor features and benefits can enhance your computing experience:
Introduction
The Intel Pentium II processors deliver excellent performance for all PC software and are fully compatible with existing Intel Architecture-based software. The latest Pentium II processors, at 350MHz and 400MHz, extend processing power further by offering performance headroom for business media, communication and Internet capabilities. Software designed for Intel’s MMX technology unleashes the full multimedia capabilities of these processors including full-screen, full-motion video, enhanced color and realistic graphics. Systems based on Pentium II processors also include the latest features to simplify system management and lower the total cost of ownership for large and small business environments.
Product Highlights
Product Description
The Intel Pentium II processor family includes 233MHz, 266MHz, 300MHz, 333MHz, and
now 350MHz and 400MHz versions for desktops, workstations, and servers.
All are binary compatible with previous generation Intel-Architecture
processors. Pentium II processors provide the best Intel performance
available for applications running on advanced operating systems such
as Windows 95*, Windows NT*, and UNIX*. The innovative 0.25 micron manufacturing
process enables these CPUs to include over 7.5 million transistors—resulting in more power in less space. The processor core is
packaged in the Single Edge Contact (SEC) cartridge enabling ease of
design and flexible motherboard architecture.
The Pentium II processor family’s significant performance improvement
over previous Intel-Architecture processors is based on the seamless combination
of the P6 microarchitecture and Intel MMX media enhancement
technology. The result is higher software performance plus headroom for
applications that take advantage of Intel MMX technology.
P6 Microarchitecture Dynamic Execution Technology
Multiple Branch Prediction: Predicts program execution through several
branches, accelerating the flow of work to the processor.
Dataflow Analysis: Creates an optimized, reordered schedule of
instructions by analyzing data dependencies between instructions.
Speculative Execution: Carries out instructions speculatively and based
on this optimized schedule, ensures that the processor’s superscalar
execution units remain busy, boosting overall performance.
Intel® MMX™ Media Enhancement Technology
Intel’s MMX technology includes new instructions and data types that
allow applications to achieve a new level of performance. Intel’s MMX
technology is designed as a set of basic, general-purpose integer instructions
that are easily applied to the needs of a wide diversity of multimedia
and communications applications. The highlights of the technology are:
Other Significant Features
- SEC cartridge packaging, developed by Intel, enables high-volume
availability, improved handling protection, and a common form factor
for future high-performance processors.
- High-performance Dual Independent Bus (DIB) architecture (system
bus and cache bus) for high bandwidth, performance and scalability
with future system technologies.
- The system bus supports multiple outstanding transactions to increase
bandwidth availability. It also provides “glueless” support for up to two
processors. This enables low-cost, two-way symmetric multiprocessing,
providing a significant performance boost for multitasking operating
systems and multi-threaded applications.
- A 512K unified, non-blocking, level-two cache that improves performance
by reducing the average memory access time and providing fast
access to recently used instructions and data. Performance is enhanced
through a dedicated 64-bit cache bus. The speed of the level-two cache
scales with the processor core frequency. With a core frequency of 400MHz, the level-two cache bus runs at 200MHz—more than twice the
speed of the Pentium® processor with MMX technology cache access.
This processor also incorporates separate 16K level-one caches, one
for instructions and one for data.
- Supports memory cacheability for up to 4GB of addressable
memory space.
- Available with ECC (Error Correction Code) functionality on the
level-two cache bus for applications where data intensity and reliability
are essential.
- A pipelined Floating-Point Unit (FPU) for supporting the 32-bit
and 64-bit formats specified in IEEE standard 754, as well as an
80-bit format.
- Parity-protected address/request and response system bus signals with
a retry mechanism for high data integrity and reliability.
Testing and Performance Monitoring Features
Performance Specifications

NOTES:
- SPECint95, SPECfp95, Norton SI-32 and CPUmark32.
- Intel Media Benchmark and Norton Multimedia Benchmark.
- Non-ECC level-two cache.
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* Legal Information © 1998 Intel Corporation
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