Here are a few photos of dust inside computers and on components. Dust is removed when you bring a computer to me for servicing. As dust builds up inside a computer it limits the flow of air. This causes a build up of heat which will eventually cook either the processor, the graphics processor or the motherboard.

heat sink

Dust on heat sink

 

Dust on processor heat sink

 

The fan sits on the heat sink which sits on the processor

Inside case before a cleaning. Notice dust under the power supply at the top and in the fans

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