The surface of a CPU or a heatsink is never entirely flat; if you place a heatsink directly on a CPU, there will be tiny (invisible) gaps between the two. Since air conducts heat poorly, these gaps have a very negative effect on the heat transfer. Therefore, an interface material with a high thermal conductivity is needed to fill these gaps, and thus improve heat conductivity between CPU and heatsink.
Years ago, when CPU hat power dissipations around 10 watts, a thermal interface material was optional, and most often used by overclockers to improve cooling performance. With todays CPUs, it is an absolute requirement.
LED Lighting Heatsink Thermal Pad
One of the most challenging issues with the use of LEDs is the control of unwanted heat. The most common way to dissipate this performance-hindering byproduct is to connect the LED package directly to a heat sink. To maximize the cooling performance of the heatsink, AOK offers its line extremely soft TP series thermal interface materials.
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