Lenovo x121e Overheating 8

The laptop I use day to day is a Lenovo x121e. It’s a nice comprimise between a netbook-like form factor but laptop grade power. It has  the same size and resolution screen as a MacBook air so I usually use it coupled with my 22″ external monitor. As good as it is, I’ve been noticing a problem with it recently.

It runs hot. Very hot. I have the laptop propped up at an angle to make it easier to type, which also increases airflow, but while writing this the temperature of the CPU is still hovering around a toasty 77C. The application I’ve included a screen grab of is ThinkPad Fan Control – An application commonly used to turn off the fans so the laptop runs quieter. I actually downloaded it to turn the fans up so I could try and cool the machine down. While playing games I’ve had the laptop randomly shut down, after feeling the underside, I can only assume this is due to the heat and it’s been automatically shut off for safety reasons.


I’ve taken the back off to ensure the fan is clear and no debris is blocking air flow. My next idea would be to try and re-apply thermal paste to the CPU, but I wouldn’t want to make anything worse!

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8 thoughts on “Lenovo x121e Overheating

  • Jenson

    I am having similar problems. Over heating when running any graphic intensive app. Also the idle temp is 77C !!!

    • Krazerxz Post author

      I have since fixed this. Idle temp is now about 60-65. Had to take the laptop apart, there was dust behind the fan which I couldn’t get to just by taking the back panel off. I also reapplied thermal paste to the CPU.

        • Celina

          Youre so cool! I dont suppose Ive learn anything like this before. So good to search out any person with some unique thoughts on this subject. realy thank you for starting this up. this web site is one thing that is needed on the internet, someone with just a little oryilnaigti. useful job for bringing something new to the internet!

      • Keith

        Hi Krazerxz — did you dismantle the fan unit itself to clean out the dust? I took my x121e apart only to find that the fan was a sealed unit and that the best I could do was to clean the blades of the fan as best I could.

  • Toni Andjelkovic

    Same problem here, laptop keeps overheating under load (watching hi-res mpegs, compiling) even after having renewed the CPU thermal paste. Removing the bottom lid is the only way to keep it from boiling. Driving up the fan speed does not seem to help. In addition to CPU heat, there must be some other component which seems to drive up the heat.

    • Chris Pomfret Post author

      I no longer have this laptop. But I did have a similar experience. Although opening it, cleaning and reapplying thermal paste did improve the situation, to the point where it would no longer shut off under strain; the laptop does get quite hot. I think it’s a fundamental design flaw, hot CPU with a low powered, small fan. :/