Pentium II

Pentium II
Original Pentium II MMX case badge
General information
LaunchedMay 7, 1997; 27 years ago (1997-05-07)
DiscontinuedDecember 26, 2003; 20 years ago (2003-12-26)[1]
Marketed byIntel
Designed byIntel
Common manufacturer
  • Intel
CPUID codeKlamath: 80522
Deschutes and Tonga: 80523
Dixon: 80524
Performance
Max. CPU clock rate233 MHz to 450 MHz
FSB speeds66 MT/s to 100 MT/s
Cache
L1 cache32 KB (16 KB data + 16 KB instructions)
L2 cache256–512 KB
Architecture and classification
Technology node350 nm to 180 nm
MicroarchitectureP6
Instruction setIA-32
Extensions
Physical specifications
Transistors
  • Klamath: 7.5 million
  • Deschutes: 7.5 million
  • Tonga: 7.5 million
  • Dixon: 27.4 million
Cores
  • 1
Sockets
Products, models, variants
Core names
  • Klamath (desktop)
  • Deschutes (desktop)
  • Tonga (mobile)
  • Dixon (mobile)
History
PredecessorsPentium, Pentium Pro, Pentium MMX
SuccessorsPentium III (SSE successor), Celeron, Pentium 4 (SSE2 successor)
Support status
Unsupported
Pentium II processor with MMX technology, SECC cartridge.

The Pentium II[2] brand refers to Intel's sixth-generation microarchitecture ("P6") and x86-compatible microprocessors introduced on May 7, 1997. Containing 7.5 million transistors (27.4 million in the case of the mobile Dixon with 256 KB on-die L2 cache), the Pentium II featured an improved version of the first P6-generation core of the Pentium Pro, which contained 5.5 million transistors. However, its L2 cache subsystem was a downgrade when compared to the Pentium Pro's.

In 1998, Intel stratified the Pentium II family by releasing the Pentium II-based Celeron line of processors for low-end computers and the Pentium II Xeon line for servers and workstations. The Celeron was characterized by a reduced or omitted (in some cases present but disabled) on-die full-speed L2 cache and a 66 MT/s FSB. The Xeon was characterized by a range of full-speed L2 cache (from 512 KB to 2048 KB), a 100 MT/s FSB, a different physical interface (Slot 2), and support for symmetric multiprocessing.

In February 1999, the Pentium II was replaced by the nearly identical Pentium III, which only added the then-new SSE instruction set. However, the older family would continue to be produced until June 2001 for desktop units,[3] September 2001 for mobile units,[4] and the end of 2003 for embedded devices.[1]

  1. ^ a b "Product Change Notification #102659-02" (PDF). Intel. August 14, 2002. Archived from the original (PDF) on March 20, 2003. Retrieved October 14, 2019.
  2. ^ "Microprocessor Hall of Fame". Intel. Archived from the original on July 6, 2007. Retrieved August 11, 2007.
  3. ^ "Product Change Notification #896" (PDF). Intel. January 14, 2000. Archived from the original (PDF) on September 30, 2000. Retrieved October 14, 2019.
  4. ^ "Product Change Notification #954" (PDF). Intel. March 13, 2000. Archived from the original (PDF) on August 15, 2000. Retrieved October 14, 2019.