With the use of DDSS II and AFFM techniques, the aid of mechanical design, consideration of system noise spreading such as reflection, absorption and transmission features forms ASUS QuieTrack ROM Drives. In the structural design, the geometrical outer casing and material are specially selected for minimum noise propagation from inner to outer casing and maximum reflective level. In the meantime, increasing the internal drive's noise absorption. From the efforts taken above, ASUS ROM drive will become quieter and easier to use.