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Thread: cpu toast, mobo good, comp turn on?

  1. #1
    FLAC samc's Avatar
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    cpu toast, mobo good, comp turn on?

    Hi I just got back an Anthlon XP +1600, msi pro mobo comp that I made a while ago.

    Anyway the guy I made it for tells me its broken, just looking at it the fan on top the heatsink was not spinning BUT the computer powers up.

    So my question is this, if the Cpu is fried would the motherboard turn on?
    Mine needs to be updated.

  2. #2
    Variable Bitrate vcbb5's Avatar
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    it would probably turn on, but not post, if fan no work, prolly fan
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  3. #3
    cml
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    Re: cpu toast, mobo good, comp turn on?

    Originally posted by samc
    Hi I just got back an Anthlon XP +1600
    If the fan died and the computer ran for more than a couple seconds the processor is definitely fried. Athlons are notorious for frying fast - see here .

    I wouldn't run it anymore because you are just frying a dead processor even more (and possibly roasting the motherboard as well - processor can get well over 500 degrees F w/o heatsink).

    This is why I would never trust an AMD processor - if the fan/heat sink fails the processor will be fried before you realize what happened. Whereas Pentium 3 and 4 immediately shut down or slow down without damage most of the time.

    - CML

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    Maximum Bitrate binary.h4x's Avatar
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    Re: Re: cpu toast, mobo good, comp turn on?

    Originally posted by cml


    This is why I would never trust an AMD processor - if the fan/heat sink fails the processor will be fried before you realize what happened. Whereas Pentium 3 and 4 immediately shut down or slow down without damage most of the time.

    - CML [/B]
    dude, i can't believe u just said that. ANY newer processor, probably 1ghz or faster will die almost instantly without a heat sink. The P4 doesnt shut itself down, the motherboard shuts off the power, so its not a processor feature for the auto shutdown, its a feature on the motherboard. (incase you didnt notice, im a HUGE AMD fan. )
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    FLAC samc's Avatar
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    Actually Im not sure what was wrong but after I took everything apart including a new layer or Artic Silver II, the comp booted up just fine.. Weird?

    Now I keep getting blue screens in Windows XP pro. Im running 256 megs of PC2100, could memory just be bad?

    I've tried uninstalling whatever to see if it was program crashing. Ive never really touched windows xp pro so cant tell whats wrong.

    Oh and the guy before me is right, any processors over 1 gig will fry within like 3 seconds without cooling. I think my board had a safety feature where if the CPU fan didnt spin the CPU wouldnt boot up. (I THINK)
    Mine needs to be updated.

  6. #6
    Unregistered User ODYSSEY's Avatar
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    Originally posted by samc
    Now I keep getting blue screens in Windows XP pro. Im running 256 megs of PC2100, could memory just be bad?
    You can try to swap out the memory, but my guess is the processor is bad. My friend's heatsink fell off during shipping. He was getting blue screens and random retarts. I looked at the system and found the heatsink laying on the bottom of the case. After I replaced the heatsink it appeared to work fine for awhile, but the blue screens returned later. He called and got the system replaced.

    If the heat didn't fully kill the processor, it still possible it is damaged. It might run simple tasks, but heavy loads may cause it to crap out.

    The P4 doesnt shut itself down, the motherboard shuts off the power, so its not a processor feature for the auto shutdown, its a feature on the motherboard.
    The Pentium 4 core comes equipped with a thermal monitoring unit that permanently checks the temperature. As soon as the core temperature has reached a certain trigger value, the thermal unit throttles down the clock of Pentium 4 until a safe temperature has been reached.

    Pentium III core is also equipped with a thermal diode and a thermal monitoring unit.

    AMDs thermal protection is currently lacking, but is bulit-in the processor's core. Both Intel's and AMDs thermal protection is built-in to the core and not controlled by the motherboard.

    I highly recommend watching the videos on the site linked above.
    ODYSSEY

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  7. #7
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    Ive had experience with this sort of thing and if the fan didnt work at boot up then the motherboard would nt of booted up the cpu..... so you maybe lucky.

    I did this once when i did an upgrade i plugged the fans power in wrong... the pc powered up but no beeps nothing... i panicked no is **** myself when i saw the fan wasnt spinning i thought i cooked my baby....but when i calmed down and reconnected the fan all was well....

    And as for not trusting amd chips thats rubbish i used intel for years and dont regret changing to an amd xp 2000+ it runs warm but with xtra cooling....it ******* kicks especially compared to wanky overpriced p4's

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