Check the Thermal Specification for the CPU if it is still within the range of operation.
Get your CPU sl number and search in the link below.
The temperature can go up to 71.4°C
If it is much over the range then, check the following:
Make sure that you have a PSU Atx Version 2.2 at least.
Make sure that the chassis is TAC - Thermally Advantage Chassis
Check for proper aeration in the chassis. (cable)
Update the bios to the latest version.
Re-integrate the cpu with new small amount of thermal paste (clean the cpu before)
If you are using an Intel board, use this software to monitor the cpu temperature
Check with board manufacturer if there is still problems.
All the best,