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Author Topic: 3.3 volts running at 2.8 volts  (Read 6536 times)

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rana

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    3.3 volts running at 2.8 volts
    « on: June 10, 2018, 03:01:40 AM »
    Is it due to that my pc restarts simply when I play video games and use google chrome .
    Getting headache plz help

    Mark.



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    Re: 3.3 volts running at 2.8 volts
    « Reply #1 on: June 10, 2018, 04:31:40 AM »
    hi rana and welcome.
    you will need to supply way more details of your issue.I for one have no idea whet you are after.

    Geek-9pm


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    Re: 3.3 volts running at 2.8 volts
    « Reply #2 on: June 10, 2018, 10:31:44 AM »
    Modern Desktops PCs require the power supply to give these voltages:
    + 12 volts
    + 5 volts
    + 3.3 volts
    Somewhere on the motherboard you will find a voltage below 3 volts. This is by design.
    On other forums this has bee a concern for some users who suspect the PC performance might be lacking due to low voltage.
    Example:
    http://www.tomshardware.com/answers/id-1902670/voltage-952.html
    I can not find any clear answer on that forum. Part of the problem is when the poster does not provide exact details about what they think is wrong.
    Short answer. Don't bark up the wrong tree.
     

    patio

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    Re: 3.3 volts running at 2.8 volts
    « Reply #3 on: June 10, 2018, 10:47:37 AM »
    Until we have info it's futile at this point...could be the CPU throttling...could be the PSU not @ 3.3 etc etc
    " Anyone who goes to a psychiatrist should have his head examined. "

    rana

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      Re: 3.3 volts running at 2.8 volts
      « Reply #4 on: June 11, 2018, 06:58:50 AM »
      but then my pc restarts randomly sometimes never sometimes when the window's screen showes up is it due to this

      patio

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      Re: 3.3 volts running at 2.8 volts
      « Reply #5 on: June 11, 2018, 11:14:14 AM »
      That doesn't quite qualify as "more info"...
      " Anyone who goes to a psychiatrist should have his head examined. "

      Mark.



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      Re: 3.3 volts running at 2.8 volts
      « Reply #6 on: June 11, 2018, 04:30:41 PM »
      ok, still as clear as mud what you are asking for.

      let's try a few questions...

      do you have a laptop or desktop PC?
      where did you get those voltage readings from?
      how old is the PC?
      do you get any error messages?
      what is the version of Windows?

      basically it sounds like your PC is randomly shutting down (for whatever reason), a common reason is dust build-up, have you blown out any excessive dust within the chassis?
      have you tested the memory?

      remember - better info means better advice. :)

      rana

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        Re: 3.3 volts running at 2.8 volts
        « Reply #7 on: June 11, 2018, 06:47:54 PM »
        I guess I have to change the thread name {no clue}. It is a custom built pc and I got the readings from bios and a hardware utility called speed fan. I have 4 4gb ram.
        No I don't get any error message it just shuts down and starts up again. I have Windows 8.1 64 bit. I have not tested the memory or cleaned the dust because I don't know how to do it

        Geek-9pm


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        Re: 3.3 volts running at 2.8 volts
        « Reply #8 on: June 11, 2018, 10:27:51 PM »
        For what it  is worth....
        With current hardware the3.3 volts is not critical. The motherboard has regulators to drop the voltage down to what's needed by CPU and RAM.

        More likely the issue is bad memory sticks
        Or a heat sink not well fitted.

        BC_Programmer


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        Re: 3.3 volts running at 2.8 volts
        « Reply #9 on: June 11, 2018, 10:36:07 PM »
        2.8V is well outside the 15% tolerance range, so you are right to be concerned. However, I don't believe it would directly cause the system to shut down.

        Also remember that Software utilities that measure voltage cannot always be relied on for accuracy.

        Assuming, however, those measurements are accurate, both your issues could be caused by something as simple as power connector that isn't fully seated onto the motherboard. I've happened across a few instances of other people having the same issues (2.8V on 3.3V Rail) and they resolved their problem by double-checking their motherboard power connections.

        I was trying to dereference Null Pointers before it was cool.

        rana

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          Random pc restart
          « Reply #10 on: June 12, 2018, 09:20:35 AM »
          Well I fixed it but it is temporary I remove a ram switch on the pc switch it off put the other ram . This works for a while but I don't know the actual problem

          Geek-9pm


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          Re: 3.3 volts running at 2.8 volts
          « Reply #11 on: June 12, 2018, 12:24:48 PM »
          What I last said was:
          Quote
          With current hardware the3.3 volts is not critical. The motherboard has regulators to drop the voltage down to what's needed by CPU and RAM.
          Here are recent posts about this from other forums:

          http://www.tomshardware.com/answers/id-2524537/asus-motherboard-voltage.html

          http://www.overclock.net/forum/11-amd-motherboards/1083601-3-3v-very-low-problem.html

          https://forums.evga.com/What39s-taxing-my-33V-rail-finally-solved-m662512.aspx

          https://forums.anandtech.com/threads/antec-true430-power-supply-low-voltage-on-3-3-volt-rail.1308473/

          In these is the idea about a power supply unit no working the way is should.
          It is a mistaken conclusion.   8)

          EDIT: Third link above reports this:
          ************** UPDATE *****************
          After messing around with this forever I finally found the culprit, a loose connector inside the molex connecting the PSU to motherboard. A little tweaking with a needle and it's steady at 3.26V
           **************************************
          « Last Edit: June 12, 2018, 12:45:18 PM by Geek-9pm »

          patio

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          Re: Random pc restart
          « Reply #12 on: June 12, 2018, 06:58:50 PM »
          Well I fixed it but it is temporary I remove a ram switch on the pc switch it off put the other ram . This works for a while but I don't know the actual problem

          This makes no sense...are you sayin you switched out a RAM stik for another one ? ?
          P;ease clarify...
          " Anyone who goes to a psychiatrist should have his head examined. "

          rana

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            Re: 3.3 volts running at 2.8 volts
            « Reply #13 on: June 13, 2018, 04:00:57 AM »
            I am saying that I have 2 ram sticks two 2 GB rams I took out one switched on my pc and shut down my pc. Put the the stick which I removed in the pc again. This is a temporary fix plz help

            Geek-9pm


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            Re: 3.3 volts running at 2.8 volts
            « Reply #14 on: June 13, 2018, 10:38:24 AM »
            Why is it temporary?
            Exactly what RAM chips do you have? Type number.
            Some RAM chips draw more current. A defective RAM chip can drop so much current as to make the voltage regulator not work well. The answer is to use a RAM chips that do not use as much power.

            Replacing the on board voltage regulator is not recommended.

            rana

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              Re: 3.3 volts running at 2.8 volts
              « Reply #15 on: June 14, 2018, 04:26:27 AM »
              it is a dda2 2gb ram 800u mhz cl1.8 model number(pc6400u-25330 or hymd564m646cp6-j aa)
              2nd one is a ddr2 2gb ram 800 dimm model number(552459-3434)
              I dont why it is temporary

              rana

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                Re: 3.3 volts running at 2.8 volts
                « Reply #16 on: June 14, 2018, 10:16:16 AM »
                This is not a fix anymore not even a temporary one . I remove one ram stick and it works I put it back it restarts

                patio

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                Re: 3.3 volts running at 2.8 volts
                « Reply #17 on: June 14, 2018, 05:49:35 PM »
                Thats because it's mis-matched RAM....a crapshoot at best.
                " Anyone who goes to a psychiatrist should have his head examined. "

                rana

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                  Re: 3.3 volts running at 2.8 volts
                  « Reply #18 on: June 14, 2018, 06:50:00 PM »
                  So what should I do with which ram