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Software to control PCI/AGP divider possible?

Discussion in 'AMD Overclocking' started by zmike6, Apr 2, 2004.

  1. zmike6

    zmike6 Guest

    I'm ignorant of how the hardware design works, but given that some
    software (like softFSB and coolCPU) can control FSB speed
    independently of motheboard settings, is it possible for software to
    directly or indirectly control PCI/AGP speed via a "software" divider?
    My MSI motherboard was indicated as supporting 166 FSB CPUs when it
    came out, but that support was never delivered (no 1/5 divider
    apparently). So right now i'm stuck at 133x16 (original 2600+
    settings). Are the FSB/PCI/AGP divider functions so hardware-based
    that no software can direcly control PCI frequency? I guess if this
    type of thing could be done someone would already have done it. It's
    annoying having a motherboard which allows setting FSB up to 200, but
    having no 1/5 divider makes this worthless as PCI is way out of spec.
    Even 166 is not usable with no 1/5 divider.
    zmike6, Apr 2, 2004
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  2. zmike6

    Chip Guest

    Nothing can create a divider that the chipset doesn't support. But in
    theory it is possible to write a piece of software that could change the
    divider. And even conceivably switch to one that was supported by the
    chipset, but not by the bios.

    There's nothing magic about a bios - its just a piece of software like
    anything else. A problem you might have with a Windows based tool though,
    is that running it could well crash Windows. And then when you rebooted,
    you'd be back to where you started. The bios has the advantage of being
    able to run *very* early on.

    Chip, Apr 2, 2004
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