I would make sure that all the BIOS settings are set to 'auto' with regards to the CPU. To have it start getting way too hot suggests that some voltages might not be set properly or it could even be a faulty PSU. Do you have another PSU you can try for a few days to see it that stops the heating problem? A bad PSU can keep hurting motherboards until you replace it with a good one.
As Albert Einstein said, "I could have done so much more with a Big Al's Computer!".