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
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.
With this application, the temperature range on the control CPU during testing was +38…+87°C.
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.
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.
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.
With smearing
According to technical recommendations, thermal paste should be 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.
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.
