Kayak XA-s CPU upgrade (66/100MHz)

Discussion in 'HP' started by Gereon Wenzel, Jan 29, 2004.

  1. I tried to swap the 266MHz CPU for a 350MHz,
    but the board doesnt adjust to 100MHz bus clock?
    The cpu comes up at 233Mhz.
    I couldn't find differnt part ## for 66/100 MHz versions,
    nor any switch or jumper to set the bus clock.
    Anybody did the upgrade succesfully?
    Installed memory is capable of 100MHz.

    Gereon Wenzel
    Gereon Wenzel, Jan 29, 2004
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  2. Gereon Wenzel

    Ben Myers Guest


    The answer to your question lies in the chipset on the motherboard. If the
    chipset is an Intel 440LX, the system is limited to 66MHz front-side bus. If
    the chipset is Intel 440BX, 100MHz is possible somehow.

    Either look at the devices shown in the Device Manager of the System icon in the
    Control Panel or simply look at the chips on the motherboard itself.

    If the system is limited to 66MHz, you have some chance of speeding it up by
    using a Socket 370 Celeron installed in a Slotket converter, with a mximum of
    533MHz... Ben Myers
    Ben Myers, Jan 29, 2004
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  3. Hi Ben,

    True, but the Kayak XA-s is BX based and capable of 100MHz.
    It has no Jumpers for the bus Clock, but for the multiplication factor
    No idea what technique is used by the BIOS to determine the bus clock?
    Didn't have to look, I replaced the board myself.

    BTW the problem is solved!
    It may has been caused but slow/bad coded memory modules?
    Installed the 350 just again and got some system beep codes.
    Replaced memory by known good branded 100MHz modules (the noname ones
    installed had
    100MHz stickers as well), set clear CMOS switch and machine came up
    at 350MHz luckily.

    Now to find another matching VRM...

    Gereon Wenzel, Feb 2, 2004
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