What is the best way to apply thermal paste to a processor?

What is the best way to apply thermal paste to a processor?

Thermal paste is used to ensure better heat transfer between the hot surface of the CPU and the heatsink. The operating temperature of the CPU depends on how well it is distributed. Let's check how well the paste spreads in the cavity between the radiator and the processor, depending on the method of its application.

One drop


What is the best way to apply thermal paste to a processor - One drop

Thermal paste can be squeezed out in a small amount at one point in the center of the processor. If you then press it with a radiator, it will spread, but not completely.
then press it with the radiator

With this application, the temperature range on the control CPU during testing was +38…+87°C.
Didn't spread completely

Five drops


What is the best way to apply thermal paste to a processor - Five drops

When applying the paste with five points, the situation improves. It spreads better, which is why the temperature during processor operation was +35…+86°C.
It spreads better

Three lines


What is the best way to apply thermal paste to a processor - Three lines

If you distribute the paste in three parallel strips, then as it spreads, the contact area will increase even more. The operating temperature in this case is +35…+84°C.
when spreading, the contact area will increase even more

Crosswise


What is the best way to apply thermal paste to a processor - Crosswise

Very good fullness of the paste is obtained when applying it crosswise. When pressed, it almost completely fills the gap between the heatsink and the processor.The operating temperature during testing in this case is +34…+82°C.
Very good filling of the paste is obtained when applying it crosswise

With smearing


What is the best method of applying thermal paste to the processor - With smearing

According to technical recommendations, thermal paste should be spread over the processor with a spatula.
spread over the processor with a spatula

This is a standard method that allows you to fill the gap 100%, but it is the most painstaking and time-consuming.
This is the reference method

When applied using this method, the operating temperature of the processor is +34…+82°C. That is, the same as with faster distribution of the paste crosswise.
What is the best way to apply thermal paste to a processor - all methods with checking the temperature

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