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Extremely high CPU temp after going from 110V to 220V

Hi all,

I recently moved from Japan (110V) to Europe (220V) with my desktop computer.

The PSU is a Silverstone SX500-LG which is supposed to support voltages from 90V to 264V so I thought it would be fine to just plug in my computer as is.

However, as soon as I turn it on the CPU temp goes crazy (+2°C per second) while the other temps are totally fine and stable.

For info my CPU is an i7-6700 and as far as I know there is no voltage switch on the PSU.

Any idea what's going on?

Thanks in advance!
13 answers Last reply Best Answer
More about extremely high cpu temp 110v 220v
  1. Try decreasing the voltage through BIOS?
  2. If there's no voltage switch, it's not a 220w compatible psu. You'll have to get another one or risk melting your components.
  3. EchohcE said:
    If there's no voltage switch, it's not a 220w compatible psu. You'll have to get another one or risk melting your components.


    My RM1000x has no voltage switch, but is compatible with up to 240V.
  4. RektSkrubz said:
    EchohcE said:
    If there's no voltage switch, it's not a 220w compatible psu. You'll have to get another one or risk melting your components.


    My RM1000x has no voltage switch, but is compatible with up to 240V.


    You've plugged it into a 220v outlet?
  5. EchohcE said:
    RektSkrubz said:
    EchohcE said:
    If there's no voltage switch, it's not a 220w compatible psu. You'll have to get another one or risk melting your components.


    My RM1000x has no voltage switch, but is compatible with up to 240V.


    You've plugged it into a 220v outlet?


    Yes, when I went over to Germany for 2 months back in 2015. It worked just fine and I did not notice any differences with temperatures.
  6. Then I bow to your experience. My apologies, I didn't know we had adaptable ones now.
  7. I remember a few years ago nearly killing an older PC by almost forgetting to flip the switch a few years ago...
  8. Best answer
    noisyouch said:
    However, as soon as I turn it on the CPU temp goes crazy (+2°C per second) while the other temps are totally fine and stable.

    Check your cpu cooler. Probably some problem with it.
    Reinstall the cooler, reapply thermal compound.
  9. EchohcE said:
    Then I bow to your experience. My apologies, I didn't know we had adaptable ones now.


    If you look at some of the power supply reviews on this site you will see that they test them with both 115V and 230V.
  10. I thought they still flipped a switch on those tests.
  11. RektSkrubz said:
    Try decreasing the voltage through BIOS?


    The BIOS says the CPU voltage is 1.072V. Seems totally normal to me.
  12. SkyNetRising said:
    noisyouch said:
    However, as soon as I turn it on the CPU temp goes crazy (+2°C per second) while the other temps are totally fine and stable.

    Check your cpu cooler. Probably some problem with it.
    Reinstall the cooler, reapply thermal compound.


    The CPU was fine before moving. Do you think some mishandling could have damaged the cooler/thermal paste?
  13. SkyNetRising said:
    noisyouch said:
    However, as soon as I turn it on the CPU temp goes crazy (+2°C per second) while the other temps are totally fine and stable.

    Check your cpu cooler. Probably some problem with it.
    Reinstall the cooler, reapply thermal compound.


    I reinstalled the cooler and reapplied thermal compound and now the temps are perfectly fine!

    Thank you for the advice.

    Although it didn't look like it, I guess something budged during the moving process.
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