- Pentium® processor with MMX technology
- High-quality fan heatsink
- Installation instructions
- Fan cable for processor fan
- Intel Inside® logo label
- Certificate of authenticity
- Three-year limited warranty
- Product registration card
The Pentium® processor with MMX technology is a significant
addition to the Pentium® processor family. Available at 166, 200, and 233 MHz, it is the
first microprocessor to support Intel MMX technology. The Pentium processor with MMX
technology runs current software 10-20% faster than the original Pentium processor at the
same clock speed. Software designed for Intel MMX technology unleashes the additional
performance provided by Intel MMX technology, enabling more colors, more realistic
graphics, full-screen, full-motion video, and other media-rich enhancements. The
improvement will be determined by the type of application and the degree to which it has
been designed for MMX technology. Intel's media benchmark, which measures multimedia
performance, runs more than 60% faster than on a Pentium processor with MMX technology
than it does on the original Pentium processor at the same clock speed.
The Pentium processor with MMX technology is designed for mainstream desktops and is both
software- and pin-compatible with previous members of the Pentium processor family. It
contains 4.5 million transistors and is manufactured on Intel's enhanced 0.35 micron
process. This process uses CMOS and voltage reduction technology for low power and high
density. This enables the Pentium processor with MMX technology to remain within the
thermal envelope of the original Pentium processor while providing a significant
The Pentium processor with MMX technology offers several
micro-architectural enhancements over previous members of the Pentium processor family.
- Doubled code and data caches to 16K each. On-chip L1 data
and code cache sizes have been doubled to 16 Kbytes each on the Pentium processor with MMX
technology. Larger separate internal caches improve performance by reducing average memory
access time and providing fast access to recently used instructions and data. The
instruction and data caches can be accessed simultaneously while the dual-ported data
cache supports two data references simultaneously. The data cache supports a write-back
(or alternately, writethrough, on a line by line basis) policy for memory updates.
- Improved branch prediction. Dynamic branch prediction uses
the Branch Target Buffer (BTB) to boost performance by predicting the most likely set of
instructions to be executed. The BTB has been improved on the Pentium processor with MMX
technology to increase its accuracy.
- Enhanced pipeline. To improve performance, an additional
pipeline stage has been added.
- Deeper write buffers. A pool of four write buffers is now
shared between the dual pipelines to improve memory write performance.
- Full support for Intel MMX technology. MMX technology is
based on a single-instruction, multiple-data (SIMD) technique, which enables increased
performance on a wide variety of media-rich and communications applications. The Pentium
processor with MMX technology supports 57 new instructions and 4 new 64-bit data types.
Existing operating systems and application software are fully compatible with the Pentium
processor with MMX technology.
The Pentium processor with MMX
technology also includes several features used for testing and performance monitoring.
- Built-in self test (BIST), providing single stuck-at fault coverage
of the microcode and large PLAs, 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
architecture mechanism, allowing testing of the Pentium Pro processor through a standard
- Debug extensions, which allow debugging of I/O addresses as well as
- Internal performance counters for performance monitoring and event