Probably the 3+ year old CPU cooler fan is dying, can you check it's speed? Is the CPU cooler heatsink clean of dust, etc? Can't see your pictures for some reason. Is your CPU voltage (Vcore) what it should be?
Try resetting/clearing your BIOS and use default settings. Check that CPU cooler, if as old as the CPU, the fans don't last forever.
Keep in mind that you do not need to worry about the cores temperature, you only need to pay attention to the CPU temperature itself.
I would suggest checking the reported CPU temperature on the BIOS of the motherboard, or check with the motherboard manufacturer to see if they have a monitoring software that can monitor the CPU temperature instead of the cores temperature.