Fact check: Is Applying CPU Thermal Paste Worth It and Mandatory?

1. Summary of the results

The consensus across multiple sources is that thermal paste plays a crucial role in CPU cooling and protection. It functions by filling microscopic gaps between the CPU and heatsink, preventing air bubbles that would otherwise act as thermal insulators ^{[1] [2]}. While thermal paste is generally considered mandatory, there's an important caveat: many modern CPUs come with pre-applied thermal interface material (TIM), making additional application unnecessary in these cases ^[3].

2. Missing context/alternative viewpoints

Several critical points are missing from the original question:

• Application Method: A common misconception is that thermal paste needs to cover the entire CPU. In reality, only a small "pea-sized" amount in the center is recommended, as excessive application can actually increase thermal resistance ^[4].
• Pre-applied Solutions: Many CPUs now come with pre-applied thermal interface material, which can be sufficient for normal use ^[3].
• Consequences of Non-use: The absence of thermal paste can lead to:
• Thermal throttling
• Increased component wear
• Potential permanent hardware damage
• Reduced system stability ^[5]

3. Potential misinformation/bias in the original statement

The original question's framing as "worth it and mandatory" creates a false dichotomy that might mislead users. Here's why:

• Hardware Manufacturers' Perspective: Companies selling thermal paste and cooling solutions have a financial interest in promoting additional thermal paste application, even when pre-applied solutions might be sufficient.
• Oversimplification: The question doesn't acknowledge that the necessity varies based on:
• Whether the CPU comes with pre-applied TIM ^[3]
• The specific use case and cooling requirements
• The importance of proper application technique ^{[4] [5]}
• Technical Reality: While thermal paste is indeed crucial for proper CPU functioning ^[5], the focus should be on proper application rather than just whether to use it or not. Using too much can be as problematic as using none at all ^[4].