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Overclocking Guide

Overclocking The Intel Pentium Pro

The Intel Pentium Pro still doesn't seem to be a popular CPU for overclocking. This is really not fair to the powerful PPro since this CPU works just as well as the Pentium for overclocking.

The first letdown seems to be the lack of any available motherboard for this CPU that runs at a 75 or 83 MHz bus speed. Hence you'll have to stick to the good old 50, 60 and 66 MHz settings. For the PPro the same methods are valid as for the Pentium - first try improving your bus speed.

A PPro150 or a PPro 180 doesn't deserve to run at the puny bus speed of 50 or 60 MHz. They are screaming to be overclocked to the 66 MHz bus speed and will reward you with a considerable performance increase and a high reliability.

Pentium Pro at1st choice2nd choice
150 MHz166 MHz @ 2.5 x 66 MHz
180 MHz233 MHz @ 3.5 x 66 MHz200 MHz @ 3 x 66 MHz
200 MHz266 MHz @ 4 x 66 MHz233 MHz @ 3.5 x 66 MHz

I admit, that it will be tough, to get a PPro180 to 233 MHz and a PPro 200 to 266 MHz, but it's worth a try. The second choices however work out in most of the cases and the PPro 150 runs great at 166 MHz. The problem with the PPro is the difficulty to adjust things. Here the SoftMenuTM technology is a let down, because it wouldn't let you choose 233 or 266 MHz. You can't adjust the voltage either, because the motherboards adjusts it by itself or more by a VRM module. Nevertheless the PPro is a worthy overclockable CPU!

  • 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! :)