Pentium II

Intel microprocessor / From Wikipedia, the free encyclopedia

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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 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 Pros. It is a single-core microprocessor.

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Pentium II
Original Pentium II MMX Case Badge
General information
LaunchedMay 7, 1997
DiscontinuedDecember 26, 2003[1]
Common manufacturer(s)
  • Intel
Performance
Max. CPU clock rate233 MHz to 450 MHz
FSB speeds66 MHz to 100 MHz
Architecture and classification
Technology node0.35 μm to 0.18 μm
MicroarchitectureP6
Instruction setIA-32
Extensions
Physical specifications
Cores
  • 1
Socket(s)
Products, models, variants
Core name(s)
  • Klamath (desktop)
  • Deschutes (desktop)
  • Tonga (mobile)
  • Dixon (mobile)
History
PredecessorPentium, Pentium Pro
SuccessorPentium III, Celeron
Support status
Unsupported
Close
Pentium II processor with MMX technology, SECC cartridge.

In 1998, Intel stratified the Pentium II family by releasing the Pentium II-based Celeron line of processors for low-end workstations and the Pentium II Xeon line for servers and high-end 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]