Liquid cooling system

A liquid cooling system comprising:

• a liquid cooling head;
• a fixing member disposed on the liquid cooling head;
• and
• a radiator disposed on the liquid cooling head through the fixing member, the radiator moving with respect to the liquid cooling head between at least a vertical position and a horizontal position through the fixing member,
• wherein an angle between a longitudinal axis of the radiator in the vertical position and the longitudinal axis of the radiator in the horizontal position is 90 degrees;
• where in the fixing member has two side plates opposite to each other, each of the side plates has a first rail and a second rail, the radiator is disposed between the two side plates, each of two opposite sides of the radiator has a first protruding portion and a second protruding portion, the first protruding portions are respectively disposed in the first rails, the second protruding portions are respectively disposed in the second rails, and the first protruding portions and the second protruding portions are capable of moving with respect to the first rails and the second rails, such that the radiator moves with respect to the liquid cooling head between the vertical position and the horizontal position;
• and
• each of the first rails has two first straight grooves and a curved groove, the two first straight grooves are connected to opposite ends of the curved groove, each of the second rails has two second straight grooves, and the two second straight grooves are connected to each other.