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how to recover from tweaked memory crash?

Discussion in 'Overclocking' started by peter, Feb 26, 2007.

  1. peter

    peter Guest

    I asked this in an asus forum but received no reply. Perhaps someone could
    help here.

    I just put together a PC using intel E4300 and an asus P5PE-VM. I want to
    tweak the memory latency parameters. But if I went overboard and the machine
    crash or won't boot, how do I reset those parameters?

    I don't suppose the BIOS is smart enough to use default parameters to boot
    up, and load the tweaked parameters after the POST (so the user has a chance
    to enter setup to modify them)?
    peter, Feb 26, 2007
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  2. peter

    Paul Guest

    It depends on the motherboard, and the quality of the BIOS code.

    On my Asus A7N8X-E, recovery is as simple as turning off the
    power and turning the power on again. In all the overclocks
    I did on that board, only once did I have to resort to using
    the CMOS jumper (because it got stuck).

    On one of my other computers, I've had to use the "Clear CMOS"
    jumper, to regain control each time. That was so annoying, I
    stopped trying to overclock it. (And you do the "Clear CMOS"
    with the computer unplugged, for safety. The manual will have
    a specific procedure listed for how to clear the CMOS, so read

    So try the power switch on the back of the computer first, and
    see if you can escape. If that doesn't work, unplug and use
    the CMOS jumper.

    Also, you can read the "CPU Parameter Recall" paragraph in the
    manual. They describe the way the feature is supposed to work.

    Have you been monitoring what is going on with CPUZ from
    cpuid.com ? That board uses the 3:2 divider at FSB1066 (DDR355)
    and it could be using 1:1 at FSB800 (DDR400). You might want to
    verify things first with CPUZ, before changing the RAM timing.
    (The factor of two in the above statements, is the ratio
    between quad pumped FSB and dual data rate RAM.)

    Paul, Feb 26, 2007
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  3. peter

    Guest Guest

    I believe on the P5PE you'd either need to turn it off, then back
    on within a few seconds, or hold the reset button in for longer
    than 5 seconds. The bios is smart enough to know when
    unrunnable parameters have been set, and will reset to factory
    Guest, Feb 26, 2007
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