Explain Cooling Methods and Devices

Explain cooling methods and devices

Heat sinks

In earlier PC’s it was possible to cool most components using
convection (passive cooling), more efficient cooling has become a necessity
on many components. To cool these components, fans are used to move heated air
away from the components and draw cooler air over them. Fans attached to components
are usually used in combination with a heatsink to increase the surface area
available for heat conduction, thereby improving the efficiency of cooling.

Heat sink: A device that absorbs and dissipates heat produced
by an electrical component, such as an integrated circuit, to prevent overheating.

Heat sinks are usually made of metal and often have fins that assist in transferring
heat to the atmosphere.

CPU and case fans

Areas where cooling fans may be used:

• Power Supply (PSU) fans : often play a double role, not only keeping the PSU itself from overheating, but also removing warm air from inside the case.
• CPU fan: Used to cool the CPU (central processing unit).

• Case fans: move air through the case, usually drawing cooler outside air in through the front and over the internal motherboard components expelling it through the rear.
• Chipset fan: Used to cool the northbridge of a motherboard’s chipset.
• Graphics card fan: Used to cool the GPU and/or memory on graphics cards.
• PCI slot fan: A fan mounted in one of the PCI slots, usually to supply additional cooling to the PCI and/or graphics cards.
• Hard disk fan: A fan mounted next to or on a hard disk drive.
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