Patent ID: 7881062

Claim:
A computer system comprising: an inner switch board, wherein an upper face of the inner switch board is configured to allow a plurality of circuit boards to be assembled thereon; an outer switch board, wherein a bottom face of the outer switch board is configured to allow a plurality of extension cards to be assembled thereon; an extension bracket module configured to be removably received in an accepting space of the computer system, comprising: a top plate, wherein the outer switch board is installed on a bottom surface of the top plate, and wherein the top plate is disposed levelly such that the bottom face of the outer switch board faces downward and is parallel to the bottom surface; and a panel, perpendicular to the top plate, having an upper side connected to a front edge of the top plate; wherein the accepting space and the inner switch board are arranged such that an edge-to-edge butt connection is formed between the outer switch board and the inner switch board when the extension bracket module is received in the accepting space.