I'm not an Intel expert, but 65C seems dangerously hot. I wonder if your CPU is throttling to save itself from self-destruction. Intel processors run hot, but I suspect that you have either a thermal paste/heatsink/fan issue or a case ventilation issue.
Keep in mind the the processor is the hottest component in your computer. It transfers heat to a thermal compound which transfers to the heat sink and all of its fins, which is transferred to the air, and then (hopefully) away from the processor and out of the case.
Processor ---> Thermal compound ---> Heatsink ---> Air inside the case ---> Outside of the case