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    FS CPU Upgrade then Severe Overheating?

    Discussion in 'VAIO / Sony' started by koiking, Jun 22, 2006.

  1. koiking

    koiking Notebook Consultant

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    The original specs of my notebook was a 1.73GHz centrino + 4200RPM HDD but recently I decided they needed a boost cos of sluggish performance so I kicked those parts out and personally upgraded the system to a 7200RPM Seagate Momentus and later a 2.13GHz centrino. Overall the system works very well and performs much faster than before however there is a big problem.

    The original CPU came with a lousy heatpad or some other bad heat conducting material so I took it apart and placed AS5 on the CPU as well as the GPU (this was thr 1.73GHz). Ran it for over 1 month and heavy use (over the 200 hours) without any problem at all. Upgrading the HDD to 7200RPM which should have added extra heat (negligible actually) had no effect on temperature problems.

    Just 2 days ago I received the 2.13GHz centrino and installed that with AS5 as the conductor. Everything seems to work fine as it is now but when I play counter-strike source, the game works erratically. The FPS drop really badly to around 7-30fps when it should be 40-60fps. Starting the game has good performance which deteriorates over time. I have read up on the drivers I am using (modded 87.25) and they should be stable. I have been having problems with the GPU performance with drivers since reformatting (sony drivers used to work best but now are rubbish).

    The system fan is on most of the time. I can hear it when the system in on but it never really goes into high use unless I play games.

    Is there a problem with the CPU heat? Is it killing the performance of the system overall when it gets too hot? If I have used too much AS5 on the CPU surface (followed the guide with the half rice grain thickness) does it affect the heat dissapation or do I just need to work in the 200 hours before it performs better?
     
  2. Valkyrie

    Valkyrie Notebook Consultant

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    Do you need to upgrade any BIOS when upgrading the CPU? I'm curious about how the voltage is supplied into the new CPU. If it's a faster CPU, would the stock BIOS automatically adjust the required voltage?

    Also, have you tried using Notebook Hardware Control? Maybe it can supply some proper/lower voltage into the cpu which may reduce the temperature.
     
  3. koiking

    koiking Notebook Consultant

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    OK i installed DHC and

    CPU voltages according to the charts is nominal at 1.356V (Voltage #2 of a Centrino 770). At a CPU load of 49% the CPU TEMP is 85 degrees................................................ is it possible the heatsinks on my notebook are no powerful enough to support the CPU increase?

    the VAIO FS model i have is pretty much a build-to-order model with most of the stuff easy to take apart.
     
  4. Valkyrie

    Valkyrie Notebook Consultant

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    wow, 85C is high. Try lowering the voltage by 0.2V and see if it's table and reduce the temp. It seems the stock voltage supplied is the same with 1.86 GHz.
    I'm able to lower the temp by 10C by decreasing the supplied voltage to a little bit above 1.0V. So I'm not sure if it will help since the stock temp is already really high.
     
  5. koiking

    koiking Notebook Consultant

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    i have reduced the voltage to 1.260V on a 16x multiplier and the temp is now 54-56 degrees idle. would that be a good working temperature? it does however go up to 90 if i running games. should i be reapplying the AS5?
     
  6. Valkyrie

    Valkyrie Notebook Consultant

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    My temperature when idle is around 50C and during heavy use with 100% cpu, it should go around 60C. I'm not sure how hot it gets during gaming, but I play Hitman Blood money on my laptop and after exiting, the temperature is still 60C.

    You might want to use prime95 as well to test the CPU for stability with the lower voltage and it should push the cpu to 100% use, and I think you can lower your voltage further.

    I wonder if the AS5 layer on the CPU is obstructed in anyway? hence preventing a good heat release to the surrounding. I think the AS5 is a good conductor that can absorb heat from the cpu but if it can't release the heat to the other side well enough than it wouldn't be useful.