At 11:37 PM 3/28/2000 , Lim Wei Siong Vincent wrote:
>I remember seeing a web site which explain in detail the entire
>family of Pentium III Processor, ie 500, 500E, 500B, 500EB.
>Can anyone please refer me to that site?

http://www.intel.com/design/PentiumIII/prodbref/

Look at figure 1...half way down the page.

Basically, there are the "E" and the "B" and the "EB", and there
are the "no letter after the speed" Pentium III processors.

The "no letter" 600 and below are fabricated using .25 Micron
technology. (The smaller the number, the better. Because the
transistors are smaller, a die can hold more of them and the
processor will use less power when running). These .25 micron
processors have 512 KB of off die (half speed) L2 cache....just
like Pentium II processors.

The "E" versions are the ones that are .18 Micron and have
256 KB of on-die L2 cache that runs at full processor speed.
If the processor is faster than 600, they don't bother adding
the "E". In other words, they're all "E" after 600 MHz. so they
stopped specifying it.

The "B" versions run with a 133 MHz. FSB systems. In other words,
the Pentium III "B" processors are half integer devisable by 133.
(If dividing by 66 or 133 gives approximately an integer, it *may*
be a "B".)

The "EB" versions are .18 Micron, have the 256 KB of L2 cache,
and run at 133 MHz front side bus. If faster than 600, they don't
bother adding the "E" to the name.

An example: 800 MHz divided by 133 MHz. is 6.01 (close enough to 6)
and there are both 800 and 800B. (I'd say 800E and 800EB, but
everything over 600 is an E.) There are both 800 = 8 X 100 and
800B = 6 X 133. (6 and 8 are the multipliers, 100 and 133 are
the FSB frequencies.)

Finally, there are both slot one and 370 pin versions of many
Pentium III processors. (Check the link above to see what versions
come in slot one and which are socketed.)

There is a slot one 800, and a 370 pin 800, and a slot one 800B,
and a 370 pin 800B.

The place where it really gets confusing is with 600 MHz processor
because there are so many versions of the 600 MHz Pentium III:
600, 600E, 600B, 600EB...all in both slot one and 370 pin versions.
There are eight different versions of the 600 MHz. Pentium III.


Regards,
Bill

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