Final answer:
The recommended frequency for reapplying thermal compound on a CPU is every 1-2 years or when CPU temperatures increase significantly.
Step-by-step explanation:
How often you should reapply thermal compound on your CPU depends on several factors, such as the type of thermal compound used, the temperature of the CPU, and the conditions in which the CPU operates.
As a general guideline, it is recommended to reapply thermal compound every 1-2 years or whenever you notice a significant increase in CPU temperatures. This is because over time, thermal compound can dry out, become less effective, and lead to higher CPU temperatures.
However, if you are using a high-quality thermal compound and your CPU temperatures remain low and stable, you may not need to reapply it for a longer period of time.