What is the order that POST test your hw?

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  • uwuasarus
    PCHF Member
    • Jan 2024
    • 3

    #1

    What is the order that POST test your hw?

    Is it psu ram cpu video then hardrive? I can never remember.
  • DENMON
    PCHF Member
    • Aug 2022
    • 59

    #2
    Is there a particular reason why you need to know? POST information can be found in the manual of your pre-built computer or in the manual of the motherboard if you built the computer yourself. If a POST test fails, then those manuals will help you determine which hardware is failing, so there is no need to remember.

    Only thing to keep in mind is that if your PSU is not supplying power for any reason, then there will be no POST test, but less obviously, is that if the motherboard or something connected to the motherboard is faulty, then POST test may fail to start. This can be noted if the computer is being supplied power but the computer restarts without giving any proper POST code. This behavior may not be brought up in the manual.

    Does that answer your question?

    Comment

    • uwuasarus
      PCHF Member
      • Jan 2024
      • 3

      #3
      Originally posted by DENMON
      Is there a particular reason why you need to know? POST information can be found in the manual of your pre-built computer or in the manual of the motherboard if you built the computer yourself. If a POST test fails, then those manuals will help you determine which hardware is failing, so there is no need to remember.

      Only thing to keep in mind is that if your PSU is not supplying power for any reason, then there will be no POST test, but less obviously, is that if the motherboard or something connected to the motherboard is faulty, then POST test may fail to start. This can be noted if the computer is being supplied power but the computer restarts without giving any proper POST code. This behavior may not be brought up in the manual.

      Does that answer your question?
      i think so, i appreciate it.

      Comment

      • uwuasarus
        PCHF Member
        • Jan 2024
        • 3

        #4
        Originally posted by DENMON
        Is there a particular reason why you need to know? POST information can be found in the manual of your pre-built computer or in the manual of the motherboard if you built the computer yourself. If a POST test fails, then those manuals will help you determine which hardware is failing, so there is no need to remember.

        Only thing to keep in mind is that if your PSU is not supplying power for any reason, then there will be no POST test, but less obviously, is that if the motherboard or something connected to the motherboard is faulty, then POST test may fail to start. This can be noted if the computer is being supplied power but the computer restarts without giving any proper POST code. This behavior may not be brought up in the manual.

        Does that answer your question?
        I’m trying to figure out the order though and the manual did not tell me.

        Comment

        • DENMON
          PCHF Member
          • Aug 2022
          • 59

          #5
          Typically when there is a table or list in the manual, then that is the order the codes are tested, but maybe that isn’t the case for all manufacturers. Typically the motherboard checks CPU > memory > GPU > other stuff in that order. Think of it as order of importance.

          Comment

          • georgeks
            PCHF Member
            • May 2017
            • 335

            #6
            First starts the PSU. After making a self-test to verify that it can provide the different voltages required, sends the POWER GOOD signal to the CPU.
            I think that you will find this interesting

            Comment

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