The non "K" CPU versions do run hot as the tiny cooler is inadequate. If you do a search about replacing the cooler on the XPS8940 with will find some very helpful threads. You could buy a Dell tower cooler that came on the 8940 with the "K" series chips, or many people have had good luck with a Noctua or Vetroo V5 tower cooler. People have also installed more fans in the case. All of these ideas and instructions on how to do it are available on various threads about the 8940's cooling.
  My XPS 8940 config is : Processor            11th Gen Intel(R) Core(TM) i7-11700 @ 2.50GHz   2.50 GHz Installed RAM    64.0 GB The motheboard has just been changed as the network card failed, it runs very hot. Do dell reccomend any upgrades to make the system run cooler ?? if not, what are people doing themselves ?  
XPS 8940, runs warm