"Laptop cooling pads have been around for decades, and the idea has always been simple: provide extra air to blow through a laptop that's otherwise restricted by its own cooling system. In theory, more air means lower temperatures-and, ultimately, better performance. This is the whole idea of the power modes that exist in Windows, which ramp up the RPMs (rotations per minute) of the fans to add more air to both improve performance."
"The problem, however, is that a cooling pad is a rather inefficient way of transferring air into your device. Most laptop cooling pads, including the two that I tested, use one large fan or two smaller fans to blast cold air across the bottom of the laptop. This is the first reason why the vast majority of modern laptops won't benefit much from a cooling pad, as these laptops tend to only have vents along the hinge."
"Without vents or open holes, blowing air across a sheet of metal or plastic isn't going to do anything to cool the components on the other side. It'll only generate a bunch of fan noise. Gaming laptops are the main exception, though, which is why they are the primary use case for such an acc"
Laptop cooling pads have existed for decades with the simple premise of directing additional airflow to reduce temperatures and improve performance. While modern laptop chips have become increasingly efficient, cooling pads remain popular among users. The effectiveness of cooling pads depends heavily on laptop design. Most contemporary laptops feature vents only along the hinge, making bottom-mounted cooling pads ineffective since air cannot reach internal components. Gaming laptops represent the primary exception, as they typically include bottom vents that allow cooling pads to meaningfully impact thermal performance and device longevity.
Read at WIRED
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