What is the recommended amount of thermal paste to apply on a CPU?

Applying a pea-sized amount of thermal paste on a CPU is the recommended practice. This method ensures that there is enough thermal compound to create an effective heat transfer between the CPU and the heat sink without excessive paste spilling out or causing mess. When pressure is applied by the heat sink, the pea-sized amount spreads out evenly over the surface, optimizing contact and aiding in heat dissipation.

Using too much thermal paste or applying a generous layer can lead to issues. Excess paste can overflow and potentially short-circuit components on the motherboard. A whole tube would unquestionably be excessive and impractical, resulting in the same risks associated with incorrect application. Properly applying a small amount ensures that there is sufficient coverage for optimal thermal conductivity while avoiding negative consequences.