List of Intel Pentium Pro microprocessors

The Pentium Pro from Intel is the first of their sixth-generation CPUs 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.

This list is incomplete; you can help by adding missing items with reliable sources.

Pentium Pro (.35 / .50 μm)
  • The 150 MHz Pentium Pro processor dies (B0, C0) used a 0.50 μm BiCMOS 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.[1]
  • 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[2]
  • 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.
Model
number		 sSpec
number		 Frequency L2
cache		 FSB Mult. Voltage TDP Socket Release date Part
number(s)		 Release
price (USD)
Pentium Pro 150
  • SY002 (B0+α)
  • SY011 (B0+α)
  • SY014 (B0+α)
  • SY010 (C0+α)
 150 MHz 256 KiB 60 MT/s 2.5× 3.1 V
29.2 W
November 1, 1995
  • KB80521EX150 256K
Pentium Pro 166
  • SY034 (sA1+α)
  • SY047 (sA1+β)
  • SL22X (sB1+β)
  • SL2FJ (sB1+β)
 167 MHz 512 KiB 66 MT/s 2.5× 3.3 V
35 W
  • Socket 8
 November 1, 1995
  • KB80521EX166 512K
Pentium Pro 180
  • SY012 (sA0+α)
  • SY039 (sA1+α)
  • SY031 (sA1+β)
  • SU103 (sA1+β)
  • SL22S (sB1+β)
  • SL22U (sB1+β)
  • SL23L (sB1+β)
 180 MHz 256 KiB 60 MT/s 3× 3.3 V
31.7 W
  • Socket 8
 November 1, 1995
  • KB80521EX180 256K
Pentium Pro 200
  • SY013 (sA0+α)
  • SL245 (sA1+α)
  • SL247 (sA1+α)
  • SY032 (sA1+β)
  • SY040 (sA1+β)
  • SU104 (sA1+β)
  • SL22T (sB1+β)
  • SL22V (sB1+β)
  • SL23M (sB1+β)
  • SL254 (sB1+β)
  • SL255 (sB1+β)
 200 MHz 256 KiB 66 MT/s 3× 3.3 V
35 W
  • Socket 8
 November 1, 1995
  • KB80521EX200 256K
Pentium Pro 200
  • SY048 (sA1+β)
  • SL22Z (sB1+β)
 200 MHz 512 KiB 66 MT/s 3× 3.3 V
37.9 W
  • Socket 8
 November 1, 1995
  • KB80521EX200 512K
Pentium Pro 200
  • SL259 (sB1+γ)
  • SL25A (sB1+γ)
 200 MHz 1 MiB 66 MT/s 3× 3.3 V
44 W
  • Socket 8
 November 1, 1995
  • GJ80521EX200 1M
Pentium II Overdrive[5][6]
  • SL2KE (TdB0+C6C/A3[7])
  • SL3EA (TdB0)
  • SL2K3
 333 MHz 512 KiB 66 MT/s 5× 3.3 V
  • Socket 8
 August 10, 1998
  • PODP66X333
 $599

See also
  • List of Intel Pentium microprocessors

References
  1. "Pentium Pro Processor Specification Update".
  2. "Intel Pentium Pro Processors — Datasheets".
  3. Pentium II Overdrive(dB0)
  4. Pentium II Overdrive
  5. Pentium II Overdrive(dB0)
  6. Pentium II Overdrive
  7. "Intel Pentium II Processor — Specification Updates".
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