Fanless Heat Sinks is a cast metal impeller floating on hydrodynamic air bearings only 1/1000 inch (0.03 millimeters) above a metal heat pipe distributor, driven by a central brushless motor. The result is a cooler that operates very quietly and is 30x more efficient than fan and heatsink solutions. The heatsink has a thermal conductor that conducts heat from the CPU to the fins. This thermal conductor cools both the heat sink and processor by providing more surface area for heat to be dissipated to the rest of the computer.

Thermal management of microdevices is becoming more and more important as the internal density of circuits increases. As the total amount of internal circuitry of electronic devices increased, the amount of current per unit area increased significantly. The heat generated by electronic devices may shorten the life of the device or cause malfunction. According to the Arrhenius equation, the lifetime of an electronic device is halved for every 10°C increase in temperature. Therefore, it is necessary to develop a heat sink that can immediately remove the heat generated by electronic devices. Heat dissipation is one of the properties required for effective thermal management as a heat sink in an electronic device. If the heat sink's heat dissipation is low, the continuous heat supply will increase its temperature, which will damage the device. The fan is used to improve the heat dissipation of the radiator. However, attaching a fan to a microdevice is difficult due to the large capacity, additional power required, and the noise generated by the fan. Designing a fanless heat sink is a challenge for future thermal management.

New Development

Recently Noctua launches a Fanless CPU Cooler in June 2021 The NHP1 uses a large heatsink to passively cool your desktop processor without producing sound. However, this won't prevent some Intel and AMD CPUs from frying at full load.  NHP1 works by removing the fans of conventional CPU coolers and reworking the metal heatsink to better absorb and dissipate heat from the CPU. The result is a 2.6-pound cooler that measures 5.98 x 6.06 x 6.22 inches but has plenty of room for your RAM slots. Another advantage of NHP1 is that it promises to collect less dust. In addition, the design of the product looks quite eye-catching inside a PC case.

However, the Intel Core i911900K was only able to achieve the fast boost clock speed when the NHP1 was equipped with a 120mm fan, and the top cover of the desktop case was removed. Even then, the processor's clock speed is only 4.4 GHz, much lower than the maximum turbo frequency of 5.3 GHz. Adding a fan to the NHP1 also spoils the appeal of the product and makes it unsightly.

GIGABYTE launches fanless heat sink X570 gaming motherboard in Sept 2021. This helps keep the chipset cool. Board dimensions are 244mm wide x 305mm high. The power circuit is a DrMOS 12+2 digital circuit in a 2-block configuration with a heatsink and heatsink fan. The heatsink to the left of the CPU socket is also a huge heatsink that covers the interface, improving cooling efficiency. It also features sound circuitry using Realtek ALC1220VB and WIMA capacitors, 2.5 Gigabit LAN using Realtek chips, and wireless LAN functions using AMD WiFi 6E RZ608  (MT7921K) chipset.