overclocking intel celeron 600

[andyfenna]

I have got a intel celeron 600mhz CPU and a motherboard with a FSB that has a jumper to set it to 100mhz or 133mhz. When I set it to 100mhz the CPU speed goes to 600mhz and when I set it to 133mhz the CPU speed goes to 900mhz. What I was wondering was is it safe to run the system at 900mhz? my RAM is PC133 and I have got a standard Cooler Master HSF, I have no add-on cards as everything is integrated on the motherboard. What do you think?

 

[Crashman]

What do I think? The Celeron 600 was a 66MHz bus CPU. At 100MHz bus, it will run 900MHz. It won't run at 133MHz bus, because the multiplier is fixed:
9x66.6..=600
9x100=900

So you must be mixed up about your board settings. Let's take a look at the PIII 600E, which had a 100MHz bus to begin with:
6x100=600
6x133.33..=800

The multipliers are always locked. A 600MHz CPU with 100MHz bus stock will run 800, not 900, at 133MHz bus. Therefore you have only one rational explaination: You're confused about your motherboard settings. When you think you're setting it at 100, you're setting it at 66:
9x66.66...=600

And then when you think you're setting it at 133, you're actually setting it at 100:
9x100=900.

It won't hurt a thing, but might require additional core voltage for stability.

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[andyfenna]

I think you maybe right there mate. what is the highest v-core setting you recommend when using a standard cooler master HSF?

 

[Crashman]

The highest I recommend for the Coppermine core is 1.95v, but you shouldn't need more than 1.80v.

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