a meat thermometer which you can buy in a grocery store for a couple bucks should tell the story.

place it against the cooling fins with the computer running.- your fingers should not touch the sensor(the long nail looking thing that protrudes from the back of the dial). if it's over the max say Mahray's 70C, its a problem.- there are so many cpus out there that you can't depend on a software program to give you reliable results unless the program was designed for that system - even then you should check the results against a physical measurement at least until you're comfortable that the software is giving reliable results.. bear in mind the fins will be cooler than the cpu.