Abstract: Devices and method for forming a chip package assembly, including a package substrate, a fan-out package attached to the package substrate, the fan-out package including a first semiconductor die including a first physical interface and a second semiconductor die including a second physical interface. The chip package assembly further including a heatsink structure including a heatsink base and a cavity within the heatsink base, and a thermoelectric cooler (TEC) embedded within the cavity, wherein the TEC is positioned above the first physical interface and the second physical interface.