So to be clear you explained the temps are at 100C correct? Have a look at the charts here and notice that 100C is the Throttle Temp. So at 100C the CPU will reduce core speed and voltage to prevent thermal damage. You would see a definite decrease in performance. That is very hot. I would invest in a good cooling pad to move more air through the system and keeps temps down. And being under warranty you must deal with Dell tech support in an effort to correct the temp problem.
-Forum Member since 2016 -I do not work for Dell -A user helping other users -If you like an answer please click on thumbs up -If a reply is a solution to your problem please click on Accept as Solution Gaming on a home built ASUS B450-F Gaming with Ryzen 5 2600X Real work on an Inspiron 15 5575 and Latitude E5430