I would also recommend lowering the Maximum Processor State, I reduced mine from 100% down to 65% and I no longer have this issue of overheating, although FM will run a little slower. As above, playing matches in 2D helps as well. You could also play with a smaller database. If you're testing tactics and holidaying through a season to see the results that will probably fry the laptop, happened to me in FM13, I couldn't holiday longer than a few days.