AMD K5

Am486/5x86 ◄ K5 ► K6


AMD K5 © Advanced Micro Devices
AMD K5 © Advanced Micro Devices

The K5 was AMD's first x86 processor to be developed entirely in-house. Introduced in March 1996, its primary competition was Intel's Pentium microprocessor. The K5 was an ambitious design, closer to a Pentium Pro than a Pentium regarding technical solutions and internal architecture. However, the final product was closer to the Pentium regarding performance, although faster clock for clock compared to the Pentium.

The K5 project represented an early chance for AMD to take technical leadership from Intel. But because it was late to market and did not meet performance expectations, the K5 never gained the acceptance among large computer manufacturers that the Am486 and AMD K6 enjoyed.


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AMD K5 SSA/5

The first "unfinished" K5 was codenamed SSA/5 which had bugs in branch-prediction and in the level 1 cache. Earlier units were sold as AMD 5k86.

AMD 5k86-P75

AMD-SSA/5-75ABR
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AMD K5 PR100

CPU-Z:


AMD K5-PR100ABQ
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5k86

The bug-free version of SSA/5, codenamed 5k86 was only sold as AMD K5.

AMD K5 PR120

AMD K5-PR120ABQ
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AMD K5 PR133

CPU-Z:


AMD K5-PR133ABR
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AMD K5 PR150

CPU-Z:

CPU die:

AMD K5-PR150ABR (the exact!! CPU) Die Picture by Pauli Rautakorpi - Published under the Creative Commons Attribution 3.0 Unported license. Slightly edited by HARDWARECOP.

AMD K5-PR150ABR
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Unlisted models:

 

  • SSA/5: P90, P100, PR75, PR90
  • 5k86: PR120, PR166, PR200

 

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