A typical home CPU can operate safely for extended periods under normal conditions, with failure due to overheating being unlikely. Concerns about CPU longevity are often overshadowed by the risk of hard drive failure due to mechanical parts. Without proper cooling, such as a heatsink and fan, CPUs can overheat rapidly. For example, an Athlon processor can last approximately 12-17 seconds without cooling, while a Pentium may last around 30-50 seconds. Overclocking a CPU with only a factory fan increases the risk of overheating. Overall, CPUs are more likely to be outgrown than damaged from heat in normal usage scenarios.