Skip to main content

Overclocking Guide

Overclocking The AMD K5

The K5 has been late in arriving, but is proving to be very powerful indeed. The latest performance figures show fairly nice results compared to the Pentium and the pricing of the K5 is just wonderful! 'How about the overclocking then?' I ask, 'after all AMD is the manufacturer of the most overclocked 486 CPUs in history'. My first overclocked CPU was an AMD 486/40 (to 50 MHz) then an AMD 486/100 (to 120 MHz) and everybody knows about the beautiful and cheap AMD 5x86-133, which just runs great at 160 MHz and still is faster than many P100 systems.

In my initial experience, the older PR75, PR90 and PR100 K5 CPUs are not great fellows for overclocking. Most of the time, the system would remain dead after moving up only one step and these versions share the same serious heat problem with the 6x86.

The PR120 and PR133, however, seem to be much better candidates. These two guys run at the same external and internal speed as the PR90 and PR100!! This proves that the chip inside has been improved and altered. Obviously these CPUs don't produce as much heat as the first incarnations, which is one of the first requirements for overclocking. The new PR150 and PR166 (at 120 and 133 MHz) seem to be of the same design.

Unfortunately I haven't got enough information to tell you anything decent about successful overclocking of the K5, but I hope that'll change. My Overclocking Survey has already got quite a lot of K5 entries.

  • alzheimerz
    Wow! History..
  • I started reading it and got to " Pentium 120 to a Pentium 133." and realised the article is 13 years old, amazing!
  • mewithsfi
    quotemsg=1553,1,1]What is overclocking? Why? Why not? Is overclocking immoral? Requirements, Goals, Techniques of overclocking. How can I find out, which bus speed my motherboard supports? Special Precautions for 75 and 83 MHz Bus Speed. Overclocking the Intel Pentium. Overclocking the Intel Pentium Pro. Overclocking the Cyrix/IBM 6x86. Overclocking the AMD K5. Overclocking Step by Step.

    Overclocking Guide : Read more
    Even though this article is 14 years old the basics are still the basics. Technology has changed alot since this post. Talking about a trip down memory lane. Thanks Tom

    Overclocking to the EXTREME
  • overclocking generates a lot of heat, .i think that when you overclocked that processor it will cause a damage to mobo, because some of the pentium pro processor doesn't require heat sink?
  • Great article
  • mHonfy
    Yes, great Article! I still have my Pentium MMX 166Mhz @ 233Mhz in a Packard Bell Legend Tower Computer.
    As far as I remember, there were 2 types of P1 166MMX processors. Only special types could be overclocked. Easy 233Mhz from 166Mhz.
    Ages ago, when I got my 166MMX I swapped it to another one, and changed the jumper setting on my motherboard. My PC still runes @233Mhz. There is no heat generated although I applied a small fan over the silent heatsink. Good times! :)