Pentium Pro

Pentium Pro
General information
LaunchedNovember 1, 1995
(29 years ago) (1995-11-01)
Discontinued1998
Marketed byIntel
Designed byIntel
Common manufacturer
  • Intel
CPUID code0F619h
Product code80521
Performance
Max. CPU clock rate150 MHz to 200 MHz
FSB speeds60 MT/s to 66 MT/s
Data width64 bits
Address width36 bits
Virtual address width32 bits
Cache
L1 cache16 KB (8 KB instructions + 8 KB data)
L2 cache256 KB – 1 MB
Architecture and classification
ApplicationServer
Workstation
Technology node500 nm to 350 nm
MicroarchitectureP6
Instruction setx86
Physical specifications
Transistors
  • 5.5 million
Cores
  • 1
Socket
History
PredecessorPentium
SuccessorsPentium II, Pentium II Xeon
Support status
Unsupported

The Pentium Pro is a sixth-generation x86 microprocessor developed and manufactured by Intel and introduced on November 1, 1995.[1]: D-2  It introduced the P6 microarchitecture (sometimes termed i686) and was originally intended to replace the original Pentium in a full range of applications. Later, it was reduced to a more narrow role as a server and high-end desktop processor. The Pentium Pro was also used in supercomputers, most notably ASCI Red, which used two Pentium Pro CPUs on each computing node and was the first computer to reach over one teraFLOPS in 1996, holding the number one spot in the TOP500 list from 1997 to 2000.[2]

While the Pentium and Pentium MMX had 3.1 and 4.5 million transistors, respectively, the Pentium Pro contained 5.5 million transistors.[3]: 12  It was capable of both dual- and quad-processor configurations and only came in one form factor, the relatively large rectangular Socket 8. The Pentium Pro was succeeded by the Pentium II Xeon in 1998.

  1. ^ Cite error: The named reference Fisher_19951102 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference ASCI_Red was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Brey_2003 was invoked but never defined (see the help page).