>We were testing a celeron 600 on a PRM 23E1 DTK mobo.
>When we started the PC a PIII 600 was detected.
>Then we realized that if as we believe even the Celeron 600 must run at 66 MHz
>with a 9X multiplier, there was no chancwe at all with such a jumperless mobo be
>cause the bigger multiplier was 8X.
>Would someone explain tu us why was a PIII FC-PGA 600 detected?
>did we put the 1.65 Volts that PIII 600 requires or the 1.5 Volts that a Celeron
> 600 requires?
>The FSB was 100 0r 66 MHZ?
>If there is a document in a site, explaining this and more things related, pleas
>e let me know.

All current CPU's from Intel are multiplier locked. Long gone are the days
where you could buy a slower labeled CPU and push it faster by increasing the
multiplier. In other words, no matter what you set the multiplier for
on the external pins of the CPU, it ignores them, and runs at the multiplier
that was programmed inside, no matter what.

That is why, even though your BIOS does not support higher multipliers, it
still is running at 600Mhz. It is being recognized as a Pentium III because
Celeron's 533a and faster are based on the P-III core.

The rated clock you should use is 66Mhz, it will likely run faster though.

Note that all of these new Celeron's (dubbed Celeron II) are disabled for SMP,
they will NOT run in multi-processor systems even though based on the P-III
core.

Russ Poffenberger               Engineering Specialist
Schlumberger Technologies ATE   DOMAIN: [log in to unmask]
150 Baytech Drive
San Jose, Ca. 95134             Voice: (408)586-6718  FAX: (408)586-4675

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