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Good suggestion! In the software, I have cpu set for 5 and GPU at 2. I did this over night and comp didn't overheat. I don't think I should go any higher to be safe.

It significantly affected my machine, even with one core the performance of my computer didn't change that​ much but the cpu was getting pretty hot, around 70C.

wow! that is getting hot! .. ok.. I will keep an eye on it. Thanks!