Asus P4P800 System Fail Because of Overclocking

I have a PC that fails to start up and the voice that comes out of the speaker reports that it is failing due to over clocking, except the system isn't over clocked.

I have tried removing the battery and resetting the BIOS, reseated all the memory / plugs / drives etc. and it still does it. I find that flexing the motherboard upwards slightly at the memory side seems to temporarily fix it and I can get a few hours use before it just suddenly cuts out and then won't restart.

A few things spring to mind - dry solder joints, thermal paste needs renewed, possible weak short circuit, screws flexing motherboard, fan housing flexing the processor and bad capacitors.

Which is the most likely culprit?

I appreciate your advice - especially if I've missed something out.
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  1. One of the more difficult ones to pin down. First what voice are you referring to ? Usually an error report/display will report symptoms not surmise a reason for the issue.

    Personally I would think dry solder more probable and would replace the motherboard.

    Mactronix :)
  2. Start with one ram dimm. Run memtest on it if it passes try the other dimm. Download hardware monitor check your system temp and voltages.
    Could be bad cap on the mb or in the ps.
  3. you've got a 10 year old computer, can i assume it's still the thermal paste originally applied 10 years ago? you mention it needs renewing.
    if that's the case then heat would not be transferring from CPU to HSF as efficiently as it once was, resulting in an overheated CPU, which your mobo is interpreting to be as a result of overclocking.

    what are your CPU temps?
  4. mactronix said:
    One of the more difficult ones to pin down. First what voice are you referring to ?

    Mactronix :)


    Hi Mactronix. It's the Asus woman that speaks through the speakers when a fault develops. It took me by surprise at first as I had forgotten that it was switched on.
  5. smorizio said:
    Start with one ram dimm. Run memtest on it if it passes try the other dimm. Download hardware monitor check your system temp and voltages.
    Could be bad cap on the mb or in the ps.


    Hi Smorizio - all DIMM's passed although on restart the same fault happened. I gave the motherboard a gentle tug away from the case at the memory side and it instantly boots.
  6. Check under the mb for a screw under the mb.if not sounds like mb has bad trace.
  7. arobertson1 said:
    mactronix said:
    One of the more difficult ones to pin down. First what voice are you referring to ?

    Mactronix :)


    Hi Mactronix. It's the Asus woman that speaks through the speakers when a fault develops. It took me by surprise at first as I had forgotten that it was switched on.


    Ah OK personally never used one of those motherboards. Do vaguely remember reading about it now you mention it.
    If the system is not starting then that leads me to suspect traces on the board which could still come down to dry solder. Its not un common with older boards. When you flex it you make the contact which makes it run.

    I don't see how flexing the board could make any difference to a heat sink, so would personally all but rule out over heating. It is still something I would double check though.

    Mactronix :)
  8. smorizio said:
    Check under the mb for a screw under the mb.if not sounds like mb has bad trace.


    Hi Smorizio - good idea. I'll take the board out and have a look underneath. Thanks.
  9. Branden said:
    you've got a 10 year old computer, can i assume it's still the thermal paste originally applied 10 years ago? you mention it needs renewing.
    if that's the case then heat would not be transferring from CPU to HSF as efficiently as it once was, resulting in an overheated CPU, which your mobo is interpreting to be as a result of overclocking.

    what are your CPU temps?


    Hi Branden - I'm getting a new PC and have extra thermal paste which I'll try re-applying to the processor. I think you could be right as flexing it might just provide enough contact with the old paste and the processor to get it past POST.

    Right now ASUS probe is reporting CPU temperatures between 35 - 45 degrees and the memory temps are around 35 degrees (They get higher with heavy usage).

    What's the best way for removing old paste?
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