LEFT 4 DEAD 2, like from 2009, why is my CPU hitting 100 degrees. I got an MSI 240mm AIO I'm not sure if it's faulty or I need a new cooler. Maybe my CPU is toast and a dud. I've reset BIOS and CMOS and for a while it worked, but recently it has been jumping well over 80 in games and as I said has hit 100 often. Not sure what to do.