The computer's CPU should operate at room temperature or 70 degrees Fahrenheit if possible. CPU temperatures rise and fall depending on the processing state – whether the CPU is idle or under a heavy workload. Most modern CPUs have integrated fail-safe mechanisms to prevent damage due to high operating temperatures.
A user can assume that the CPU is running at dangerous temperature levels if he notices a decrease in the computer's performance or the computer unexpectedly restarts or shuts down. If these problems persist, the user should improve the computer's cooling system. Replacing the thermal paste, cleaning dust build-up, adding more fans and using dedicated cooling solutions, such as water cooling, are some ways to keep the CPU at safe operating temperatures.