PentiumŪ II processor at 450 MHz, Intel's high performance desktop
processor, integrates the best attributes of the P6 microarchitecture processorsDynamic
Execution performance, a multi-transaction system bus, plus Intels MMX media
enhancement 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 servers and workstations.
Discover how Pentium II
processor features and benefits can enhance your computing experience:
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 processor, at 450 MHz, extends processing power further by offering performance
headroom for business media, communication and Internet capabilities. Software designed
for Intels MMX technology unleashes the full multimedia capabilities of these
processors including full-screen, full-motion video, enhanced color, and realistic
graphics. The Pentium II processor brings excitement to your PC experience. 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. The
PentiumŪ II processor offers great performance for today's and tomorrow's applications.
- Available in speeds from 233 MHz up to 450 MHz.
- Utilizes Intels 0.25 micron manufacturing process for increased processor core
frequencies and reduced power consumption.
- Includes MMX media enhancement technology.
- The Pentium(r) II processor at 450 MHz delivers 32% more integer performance (as
measured by SPECint95), 30% more multimedia performance (as measured by Norton Media
Benchmark), and 35% more floating point performance (as measured by SPECfp95) than the 333
MHz Pentium(r) II processor.
- Dual Independent Bus (DIB) architecture increases bandwidth and performance over
- 450, 400, and 350 MHz versions improve system bandwidth and performance by increasing
the system bus speed from 66 MHz to 100 MHz. The IntelŪ 440BX AGP set enables the 100 MHz
system bus to increase peak processor data transfers to the rest of the system by 50%.
- Single Edge Contact (SEC) cartridge packaging technology delivers high-performance
processing and bus technology to mainstream systems.
- 32K (16K/16K) non-blocking, level-one cache provides fast access to heavily used data.
- 512K unified, non-blocking, level-two cache.
- 450, 400, and 350 MHz versions support memory cacheability for up to 4GB of addressable
- Enables scalable systems to be expanded to two processors and 64GB of physical memory.
- Includes data integrity and reliability features such as Error Correction Code (ECC),
Fault Analysis, Recovery, and Functional Redundancy Checking for both system and L2 cache
The Intel Pentium II processor family includes 233 MHz, 266 MHz, 300 MHz, 333 MHz, 350
MHz, 400 MHz, and now 450 MHz versions for desktops, workstations, and servers. All are
binary compatible with previous generation Intel-Architecture processors. Pentium II
processors provide Intel's highest level of desktop performance for applications running
on advanced operating systems such as Windows* 95*, Windows* 98*, Windows NT*, and UNIX*.
The innovative 0.25 manufacturing process enables these CPUs to include over 7.5 million
transistorsresulting 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
The Pentium II processor familys 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
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 processors superscalar execution units remain
busy, boosting overall performance.
IntelŪ MMX Media
Intel MMX technology includes new instructions and data types that allow applications
to achieve a new level of performance. Intel 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
- Single Instruction, Multiple Data (SIMD) technique
- 57 new instructions
- Eight 64-bit wide MMX technology registers
- Four new data types
Testing and Performance
- 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. This processor also incorporates
separate 16K level-one caches, one for instructions and one for data.
- 450, 400, and 350 MHz supports memory cacheability for up to 4GB of addressable memory
- 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.
- Built-in Self Test (BIST) provides single stuck-at fault coverage of the microcode and
large logic arrays, as well as testing of the instruction cache, data cache, Translation
Lookaside Buffers (TLBs) and ROMs.
- IEEE 1149.1 Standard Test Access Port and Boundary Scan mechanism enables testing of the
Pentium II processor and system connections through a standard interface.
- Internal performance counters for performance monitoring and event counting.
- Incorporates an on-die diode that can be used to monitor the die temperature. A thermal
sensor located on the motherboard can monitor the die temperature of the Pentium II
processor for thermal management purposes.