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  • #2130421

    FSB’s and CPU multiplier settings

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    by pctech ·

    Can someone explain to me about system buses and CPU multipliers ?. My query is this: I brought a P4 1.5 GHz with a Gigabyte M/B model # GA-8IDML-C that supports a 400MHz FSB with the 845 Intel chipset. When I had a look through the BIOS settings I noticed that it was set with the CPU host frequency to 100 MHz ? is this ?CPU host frequency? the same as the FSB or is it something different? And also the CPU host clock control is disabled ?.. what is the CPU host clock control? The CPU clock ratio is set to 15
    I thought that to get a 1.5GHz CPU speed with a FSB of 400 that the multiplier would have been 3.75 (400 x 3.75 = 1500) but obviously my understanding of FSB and CPU multipliers is not good ??.. can anyone explain it to me in easy to understand terms?

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    • #3547256

      FSB’s and CPU multiplier settings

      by syadm ·

      In reply to FSB’s and CPU multiplier settings

      This is a bit of a sales trick by Intel.
      The P4 processor uses an external bus of 100MHz, not 400, but by transferring fur times a much on each clock cycle the performance is equal to a 400 MHz bus. Your clock ratio is 100MHz X 15 and that is correct.

      Regards. /Tom

    • #3440696

      FSB’s and CPU multiplier settings

      by pctech ·

      In reply to FSB’s and CPU multiplier settings

      Thanks alot for the answer it is all clear to me now

    • #3450922

      FSB’s and CPU multiplier settings

      by pctech ·

      In reply to FSB’s and CPU multiplier settings

      This question was closed by the author

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