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    #1

    Q9400 Problems D:

    hey again, ive been having problems with my Q9400, at idle cores 0 and 2 report that they are at about ~70C and the other two at around ~30C. I have tried replacing the TIM with AS Ceramique applied per their recommendations. has anyone seen anything like this before?
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    #2
    Re: Q9400 Problems D:

    Maybe your heatsink is not seated right and you are only getting good contact on one half of the CPU?
    "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
    -David VanHorn

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      #3
      Re: Q9400 Problems D:

      i checked all that multiple times, i put a Q6600 in, with the exact same configuration and i dont get the same problem, all cores are within 5 degrees

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        #4
        Re: Q9400 Problems D:

        Did you mess with the IHS (that metal plate on top of the chip?) - that should keep the cores around the same temperature... Otherwise no clue, other than perhaps failure of the connecting compound on the IHS.

        If the CPU is working fine with a proper and properly attached heatsink, I'd just leave it... leave sleeping dogs lie...

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          #5
          Re: Q9400 Problems D:

          I've heard that the built-in temp sensors on some CPU's can be VERY inaccurate.
          Muh-soggy-knee

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            #6
            Re: Q9400 Problems D:

            I would have thought that after all this time they should be pretty accurate by now!
            "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
            -David VanHorn

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              #7
              Re: Q9400 Problems D:

              Did you check the actual HS temps? If they were that high, you'd know it from the heat output. Not to mention the cores should be at a similar temp... they are on one die after all. Small differences are expected (hence multiple sensors)... but that large of a difference wouldn't hold for long (the temps should equalize over time if the load is constant)
              sigpic

              (Insert witty quote here)

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                #8
                Re: Q9400 Problems D:

                I have a Q8400, core 0 idles at 107F, core1 at 130F, core 2 at 118F, and core 3 at 118F. I've got a Noctua NP-12 on it I think. With the stock, the highest was about 140F at idle. That rig puts out a lot of heat, keeps the room warm when it's running. The one I'm using now idles at about 95F. All cores are within 5F of each other. It doesn't help with heating the room as well as the old one.
                sigpicThe Sky Is Falling

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                  #9
                  Re: Q9400 Problems D:

                  I guess I got somewhat lucky, my C2Q is a Q9550S but it doesn't get that warm at all. I do recall my Q6600 which did generate a bit more heat, but not excessively...

                  However I do notice that some cores sometimes does get warmer than others - but the Linux scheduler tends to swap cores every once in a while and temperatures balance out (along with the IHS). But with a properly working heatsink/fan I don't see how you can really get 70C temperatures when idle (and it would be difficult to crack the IHS glue to behave like this)... perhaps there's some virus code running that's being disguised as idle? Do multiple OS's show the same behavior?

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