We also implemented a design change to make the fan better for cooling. If the fan were made larger, the airflow would increase and improve cooling efficiency, but the computer would become noisier, more power would be consumed, and space would be taken. The CF-F8, which contains a standard voltage CPU, features low power consumption while at the same time uses a 42 mm diameter fan that was specially designed for quiet operation to supply the required airflow. However, the chassis on the CF-S9 is smaller and in order to achieve further compactness, the mainboard was reduced in size by around 30% compared to the CF-T8/W8. Naturally, the fan would have to be smaller in order to fit on the mainboard. To overcome this, we used a smaller 29 mm diameter fan, but increased the height and changed the blade shape to increase the airflow. We also removed large parts such as the PC card slot from the mainboard and designed it so that air flows not only over the surface of the mainboard, but throughout the entire chassis to achieve efficient cooling. Compared to the CF-T8/W8, airflow has increased by approximately four times.
In this way, the CF-S9 succeeds in our attempt to equip a 12.1” ultra-portable PC with a high performance standard voltage CPU. This is a computer that will expand business opportunities throughout the world by enabling one to efficiently do deskwork away from the office.