Frore Systems has developed a cooling chip it calls AirJet that sits on top of a heat-generating chip and cools it without the need for mechanical fans. It’s 2.8mm thick and uses pulsating inlets to suck air into it and exhaust it out the sides.
The AirJet Mini looks like a credit card, and measures 41.5mm long by 27.5mm wide and 2.8mm thick. It can remove 5.25W of heat while consuming just 1W with a very quiet 21 dBA of noise. The AirJet Pro for x86 is a bit larger, naturally. It measures 71.5 mm by 31.5mm at the same 2.8mm thickness. It can exhaust 10.75W of heat while using just 1.75W.
The mechanism works via membranes inside that vibrate at ultrasonic frequencies. This vibration sucks air into inlets at the top of the AirJet. Once inside the device, air is then transformed into “pulsating jets” as the air removes the heat from the heat spreader. It is eventually exhausted out of the sides via integrated spouts.