Intel Pentium Pro 180 MHz

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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 Pentium in a full range of applications. While the Pentium and Pentium MMX had 3.1 and 4.5 million transistors, respectively, the Pentium Pro contained 5.5 million transistors. Later, it was reduced to a more narrow role as a server and high-end desktop processor and was used in supercomputers like ASCI Red, the first computer to reach the trillion floating point operations per second (teraFLOPS) performance mark in 1996. The Pentium Pro was capable of both dual- and quad-processor configurations. It only came in one form factor, the relatively large rectangular Socket 8. The Pentium Pro was succeeded by the Pentium II Xeon in 1998.

General information
Type CPU / Microprocessor
Market segment Server
Family Intel Pentium Pro

CPU part numbers
  • KB80521EX180 256K is an OEM/tray microprocessor
  • BP80521180 256K is a boxed microprocessor
Frequency  ? 

180 MHz

Bus speed  ?  60 MHz
Clock multiplier  ?  3
Package 387-pin Modified Staggered Ceramic Pin Grid Array with gold plated heat spreader
2.66″ x 2.46″ (6.76 cm x 6.25 cm)
Socket Socket 8

Weight 3.2oz / 90g
Introduction date 1-Nov-95
Upgrade options Pentium II Overdrive
S-spec numbers
Part number ES/QS processors
Q033 Q035 Q0871 Q0873 Q0907
BP80521180 256K
KB80521EX180 256K + + + + +
Part number Production processors
SL22S SL22U SL23L SU103 SY012 SY031 SY039
BP80521180 256K + +
KB80521EX180 256K + + + + +
Architecture / Microarchitecture
Instruction set x86
Microarchitecture P6

Core stepping  ? 






Manufacturing process 0.35 and 0.6 micron
5.5 million transistors
Data width 32 bit
Data bus width 64 bit
Floating Point Unit Integrated
Level 1 cache size  ?  8 KB 4-way set associative instruction cache
8 KB 2-way set associative data cache
Level 2 cache size  ?  256 KB
Pipeline 12-stage
Multiprocessing Up to 4 processors
Low power features
Electrical / Thermal parameters
V core  ?  3.3V ± 5%
Minimum/Maximum operating temperature  ?  0°C – 85°C
Typical/Maximum power dissipation

24.8 Watt / 35 Watt

Thermal Design Power  ?  31.7 Watt
Notes on Intel KB80521EX180 256K
  • Minimum bus frequency is 50 MHz