Hello I used the small sachet of thermal paste which came with the cooler and we put on more than a rice amount which is usual. The cpu cooler may not be on correctly but would this make it go to 100 degrees when in gameWhat kind of thermal paste are you using?
If your temps are instantly jumping that high then it's very likely that the CPU cooler is not seated properly. What temps do you see if you go from all off and cold to the BIOS? Another question is, how much thermal paste are you using? Too little is going to cause problems. Too much is less likely to cause problems.