Electronic apparatus and cooling system for electronic apparatus

A cooling system configured to immerse a plurality of electronic apparatuses in a cooling liquid for direct cooling, comprising:

• a cooling tank having an open space formed by a bottom wall and side walls;
• a plurality of arranged storage sections formed by dividing the open space with a plurality of inner partitioning walls disposed in the cooling tank;
• an inflow opening and an outflow opening for the cooling liquid that are formed at each of the plurality of storage sections;
• and
• a pair of board retainers provided for a respective one of the storage sections, wherein:
• the inflow opening is formed in a bottom portion or a side surface of each of the storage sections, and the outflow opening is formed in an area near a liquid level of the cooling liquid which circulates through the respective one of the storage sections;
• the pair of board retainers are configured to retain any one or both of a first board and a second board of the electronic apparatus;
• each of the electronic apparatuses includes the first board having a first surface on which at least one processor is mounted, and a second surface opposite the first surface, the second board having a third surface which faces the second surface of the first board, and a flow channel formed as a gap between the second surface of the first board and the third surface of the second board;
• and
• a plurality of spacers and a plurality of screws for retaining the gap, wherein each of the screws penetrates through the first board, the second board, and the spacers for fixation,
• wherein:
• the first board or the second board includes at least one connector,
• the connector is electrically coupled with a power source line or a signal line provided for a pair of board retainers which retain any one or both of the first board and the second board in the respective one of the storage sections.