This is just plain silly. Computer CPUs simply do not fail because of overuse in today's primitive technology. It is a fact that all CPU are running at 100% capacity at all times including the one you are using to read this. It is the operating system that will interrupt the "Idle" process so you can use the computer as you want. However, the Idle process is not idle, only computer code that repeats over and over again, but the cpu is still running commands while it is on. CPUs overheating and failing only occur when it is running outside of its design parameters such as when overclocked or placed under water.
In reply to the comment: Yes, CPU are not using 100% of all resources that are available all the time. However, CPUs are executing a command all the time. In the comment, the HLT command is a command that the CPU is executing until the next command, interrupt, is sent. What I'm saying is that the CPU is always running as long as the computer is on.
In the scenario, each CPU is running more instructions than normal. That would mean that the CPU is releasing more heat than usual. This is why in my office, the computer room has its own air conditioner running even in winter. So if heat is an issue, the engineer would have to deliberately place CPU is an environment that would cause it heat failure. However, properly engineered overuse would not cause heat failure.
