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    Undervolting causing overheating..

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by MatthewRuddy, Jul 14, 2009.

  1. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    So I decided to follow the undervolting guide and it was a success, lowered my temps by about 5 degrees, but I have noticed a problem.

    My laptop no changes CPU frequency often, from 1ghz to 1.66ghz to 2ghz within seconds and back down again.. This is causing the laptop to run constantly hot and at high temps.. CPU temp is on average 60 degrees simply browsing the internet.. and the laptop fans in reaction have to speed up making it quite loud. (Highest recorded temp whilest stress testing was 71 degrees before undervolting, and 66 degrees after undervolting).

    What have I done wrong? Why is this? :(
     
  2. nacholambre

    nacholambre Notebook Consultant

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    You cannot have best of both worlds my friend. It is unfortunate. Do this when playing games only!
     
  3. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    Again, I have no idea what you mean by this. Undervolting should not cause overheating. It's weird if your computer's temperature has increased overall. Even if your CPU is changing voltages/multipliers, it shouldn't be hotter than max voltage/multiplier at all times.
     
  4. nacholambre

    nacholambre Notebook Consultant

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    I think he means after undervolt the system becomes stuck at fixed level!
     
  5. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    No.. Before the undervolt, the CPU ran at either 1ghz or 2ghz.. << Intel Speed stepping.. Depending on usage.. and temps never got too hot..

    After undervolting, now my system is CONSTANTLY switching betwen 1ghz, 1.66ghz, and 2ghz.. And running VERY HOT constantly, even when browsing the web!

    However, the highest recorded temp stress testing BEFORE undervolt was 71 degrees.

    AFTER undervolt highest recorded temp was 66 degrees.. BUT it now CONSTANTLY runs at around 60 degrees whilest undervolted.

    NOT undervolted, the average temp is about 50 degrees average.
     
  6. sgogeta4

    sgogeta4 Notebook Nobel Laureate

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    Is it doing it while your computer is idle or doing certain things (what programs are you running)?
     
  7. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    Idle pretty much.. if you consider web browsing and occasionly listening to music at the same time idle.
     
  8. Andy

    Andy Notebook Prophet

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    Keep an eye on the CPU usage in task manager.

    When undervolting in RMClock, select the Performance on Demand profile and select multiple/all FIDs/VIDs. EIST should work then. If its not, then there is some sort of bug that is probably preventing EIST from working. You might as well try some other undervolting tools such as CPUgenie, CrystalCPUID, etc.
     
  9. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    It is working.. I think the temp increase is caused by the constant changes from 1ghz to 1.66ghz to 2ghz within time frames of 5-10 seconds simply going from webpage to webpage..

    I have just enabled performance on demand just this second to see exactly what is going on. Temps have not yet rose.. But I have noticed while typing this Rainmeter is telling me the CPU is running at 2000mhz.. Rightmark is telling me it's at 1000mhz (1ghz).. and sometimes suddenly changing to 1.16ghz then back to 1ghz while typing this.

    When I clicked the HWmonitor shortcut to see the temps.. It went to 1.66ghz then 2ghz then back down to 1ghz in 2 seconds.. I can only suggest that these sudden speed changes when I open programs cause the high temps.
     
  10. MatthewRuddy

    MatthewRuddy Notebook Consultant

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    Just noticed there when I clicked the "post" button on that last reply is shot to 1.66ghz then 2ghz again now back at 1ghz.. And the laptop fans have gotten faster.
     
  11. Andy

    Andy Notebook Prophet

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    Thats normal behaviour. CPUs that support EIST are supposed to do that. The frequency/multiplier of the CPU changes dynamically, and these jumps in frequency are not the cause of the heat being produced. Make sure your CPU is properly undervolted at each multiplier to get the best out of undervolting. RMClock should be more accurate with the CPU readings.

    Might as well checkout the cooling guide. The fan vents might need some cleaning.
     
  12. deputc26

    deputc26 Notebook Consultant

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    mmmmm you shouldn't be spooling up for clicks and webpages. What OS are you running?
     
  13. mullenbooger

    mullenbooger Former New York Giant

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    Speedstep or rapid changes in CPU frequency shouldn't cause higher temperatures. It could be that you're not really idling (some background program)

    Also, check your voltage readings when you're just using your computer normally and when the CPU freq fluctuates. I had some issues where RMclock settings didn't always take precedence (like sometimes Rmclock settings would work, and a few seconds later windows default settings took effect>)