The Pentium II brand refers to Intel's 6th-generation microarchitecture ("P6") and x86-compatible CPUs introduced on May 7, 1997. Containing 7.5 million transistors, 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 Pentium Pros. In early 1999, the Pentium II was superseded by the almost identical Pentium III, which basically only added SSE instructions to the CPU.
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.
The Pentium II Deschutes (1998)
The Deschutes core Pentium II (80523), which debuted at 333 MHz in January 1998, was produced with a 0.25 µm process.
Intel Pentium II 300 MHz
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80523PX300512PE Specification Details |
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Intel Pentium II 333 MHz
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80523PX333512PE Specification Details |
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Intel Pentium II 350 MHz
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Intel Pentium II 400 MHz
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BX80523U400512E Specification Details |
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The Pentium II Xeon Drake
The first Xeon-branded processor was the Pentium II Xeon (code-named "Drake"). It was released in 1998, replacing the Pentium Pro in Intel's server lineup. The Pentium II Xeon was a "Deschutes" Pentium II (and shared the same product code: 80523) with a full-speed 512 kB, 1 MB, or 2 MB L2 cache. The L2 cache was implemented with custom 512 kB SRAMs developed by Intel.
Intel Pentium II Xeon 450 MHz
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450 MHz Specification Details |
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The Mobile Pentium II
Intel Mobile Pentium II
Sorry, but there is no specification for this CPU at this time due to missing SSpec.
Unlisted models:
- Pentium II Klamath: 233 MHz, 266 MHz, 300 MHz
- Pentium II Deschutes: 450 MHz
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