Processor class and speed

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Getting the Processor Class and Speed

If the POST process tells you the processor class and speed, use that information to record on the label. If not, you can boot from the WHAZIT disk or a MEMTEST disk to determine this information. Failing that, you will need to look at the processor itself to make the determination.

It helps to know the processor types that we tend to get at FREE GEEK. Here are some Intel chips:


These ones are seated in a ZIF socket, typically a Socket 5 or a Socket 7. Since they are usually covered by a heat sink, you will have to unlatch the heat sink, release the lever for the ZIF socket, and pull the processor out. Look first at the bottom of the processor for a model number. At the end of the model number, the speed is indicated. The model number is often on the top of the processor instead, and you may need to remove the heat sink to see it. Standard speeds for Pentiums are:

  • 75
  • 90
  • 100
  • 120
  • 133
  • 166
  • 200
  • 233

Pentium Pro

These ones are like Pentiums (above) but are in Socket 8s. Standard speeds for Pentium Pros are:

  • 180 ?
  • 200
  • 233

Pentium II

These ones are in slots attached to heat sinks, and you can usually read the speed from the model number on the heat sink. 8s. Standard speeds for Pentium Pros are:

  • 233
  • 266
  • 300
  • 350
  • 400
  • 450

Pentium III

These ones are similar to Pentium IIs.

  • 450
  • 500
  • 550
  • 600
  • 650
  • 700
  • 750
  • 800
  • 850
  • 900
  • 933


These ones are similar to Pentium IIs.

  • Speeds???