What are the x86 range of processors?

[Baffled]

Hi,
I'm looking after a number of PCs of various ages. Our more modern PCs display their CPU speed alongside their CPU type. We have a number of PCs with processors stating that they are "x86 Family n Model n Stepping n AT/AT Compatible". Can anyone throw any light on how fast the CPUs are on these processors?

Also, could you explain what AT/AT Compatible means? One of our PCs does not say this. What difference does that make to it?

Thanks

[hmar]

x86 is the arcitechture of most intel and AMD chips, and dates back to the original intel 8086 architecture. AT/AT compatible refers to the old IBM PC/AT and does not tell you much of anything about speed.