In the PCWorld interview on YouTube they even showed an unbranded Intel laptop cooled by these chips and also mentioned that multiple device manufacturers are planning to put this technology inside their products this year. So I highly doubt this high frequency noise is an issue. They also explained that the traditional arrangement of having a vapor chamber between the CPU and the active cooling to move heat also works with this design without losing efficiency, and this way they also can increase the cooling capacity by putting more chips next to one another.