This ultrathin all-in-one PC brings a new dimension to home computing and entertainment. Its beautifully shaped back-cover and elegant metal base add style to the home environment. Keeping a PC with an ultrathin body cool is challenging. We built in a fan-less liquid loop cooling system that uses the evaporation and condensation of liquid to dissipate heat. It does not need a pump to drive the circulation nor does it need a fan to blow away the heat, making the PC less power hungry. Without the annoying fan noise and fan-clogging dust, it brings not only efficient and quiet computing, but also makes for a longer PC lifetime and energy-efficiency.