Current sound of x61

After several months of use, I suddenly found out that when I rolled the screen in a browser, this book made a ZZ sound, a little harsh, but not easy to notice, especially when the fan is turned.

I thought it was a problem with the LCD screen (which really gave me a fright). I searched the internet and found it was a problem with CPU frequency modulation.

When the CPU reaches the highest frequency, there will be a strong current sound, and the sound is very disturbing.

When I scroll the screen in a browser, it takes up a lot of CPU resources. When I use the system, the CPU frequency is adjusted to the highest (I set the CPU mode to adaptive), and then the ZZ sound is triggered. (My CPU is dual-core 2.2 GB)

If you do not need to make current sound, you have to set the CPU mode to the lowest level and manually change it when you want to run a large program.

This problem is still a bit annoying. I don't know whether it is my PC or the design of the manufacturer ..
And the second fan has been turning .....

Haha, there is no problem with the others. It is quite good to use it.