The
Pentium Pro
The Pentium Pro is a sixth-generation x86 microprocessor developed and manufactured by Intel and introduced on November 1, 1995. It introduced the P6 microarchitecture (sometimes termed i686) and was originally intended to replace the original ...
is the first of
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...
's sixth-generation
CPUs
A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, and ...
targeted at the consumer and server markets. The processor was relatively unusual in that the Pentium Pro used a unique "on-package cache" arrangement; the processor and the cache were on separate dies in the same package and were connected closely by a full-speed bus. The dies had to be bonded together early in the production process, before testing was possible. This meant that a single, tiny flaw in either die made it necessary to discard the entire assembly, which was one of the reasons for the Pentium Pro's relatively low production yield and high cost.
Pentium Pro (.35 / .50 μm)
* The 150 MHz Pentium Pro processor dies (B0, C0) used a 0.50 μm
BiCMOS
Bipolar CMOS (BiCMOS) is a semiconductor technology that integrates two semiconductor technologies, those of the bipolar junction transistor and the CMOS (complementary metal-oxide-semiconductor) logic gate, into a single integrated circuit. In ...
process.
* The 166, 180, and 200 MHz Pentium Pro processor dies (sA0, sA1, sB1) used a 0.35 μm
CMOS process.
* The sA0 stepping is logically equivalent to the C0 stepping, but on a different manufacturing process.
* The 256 KB L2 cache dies (256/α, 256/β) used a 0.50 μm BiCMOS process.
* The 512 KB and 1 MB L2 cache dies (512/α, 512/β, 1024/γ) used a 0.35 μm CMOS process.
* The 1 MB L2 cache models were implemented with two 512 KB dies plus the processor die
* L2 cache on all models was off-die and ran at full CPU speed.
* Only the Pentium II Overdrive supports
MMX.
* The Pentium II Overdrive processor is based on the 0.25 μm Pentium II
Deschutes core, with the distinction that its L2 cache runs at full CPU speed, not Deschutes' half CPU speed.
See also
*
List of Intel Pentium microprocessors
The Intel Pentium brand is a line of mainstream x86-architecture microprocessors from Intel. Processors branded Pentium Processor with MMX Technology (and referred to as Pentium MMX for brevity) are also listed here.
Desktop processors
P5 ...
References
External links
Comprehensive list of all Pentium Pro processor S-codes
{{Intel processors, p6
*Pentium Pro
Intel Pentium Pro