CPU hysteresis temperature refers to the phenomenon where a CPU does not return to its original state after experiencing changes in temperature, such as heating or cooling. This can occur due to internal changes within the CPU, potentially resulting from damage caused by excessive heat. In typical operation, CPUs should not exhibit hysteresis, as they are designed to function efficiently without significant energy loss. However, if internal components are compromised, the energy loss from hysteresis could contribute to further damage, although it is likely minimal compared to the overall power output of the CPU, which can be around 100 watts. Understanding this concept is crucial for maintaining CPU performance and longevity.