Radiator of computer system

The utility model is a heat-dissipation device of computer system, which is a heat-dissipation device mainly used in the computer system to avoid the second heating elements (hard disk driver, CD driver, etc.) in allusion to the first heating elements (like adapt card, display card, etc.). The heat-dissipation device is mainly on the frame body between the first and second heating elements in the shell body. The two sides of the frame body have opposite hatches and a fan is positioned between the hatches. The relative place between the shell body and the hatches on the two sides of the frame body is provided with a corresponding hole. In this way, via the running of the rotation of the fan, the outside cold air can directly enter the shell body through shell body hole and the hatches on the two sides of the frame body, thus avoiding the second heating element in the shell body and directly blowing towards the first heating element to improve the heat-dissipation effect.