A computer device includes a chassis, a card connector, and a cartridge. The card connector is attached to the chassis and is adapted to receive a card. The cartridge includes a guide plate, a card holder, and an actuator. The guide plate is removably engaged to the chassis. The card holder is connectable to the card and movable, relative to the guide plate, between an engaged position and a disengaged position. In the engaged position, the card is connected the card connector, and in the disengaged position, the card is disconnected from the card connector. The actuator is engaged with the guide plate, and the actuator linearly moves between a first position and a second position relative to the guide plate. The movement of the actuator from the first position to the second position causes the movement of the card holder from the disengaged position to the engaged position. The computer device is a server, and the cartridge is introduced into front face or a rear face of the server.