Source
https://towardsdatascience.com/upgrade-your-memory-on-google-colab-for-free-1b8b18e8791d
Simply run this code in the first cell of a working notebook
a = []
while(1):
a.append('1')
conda create --name spy4 --clone base
Upon restart the fan of the desktop got loud again. I cleaned the desktop from the dust but it was still loud (Lower than the first sound) ...