Abstract: A server structure having a tray, a mother board, a computing device, a computing device, a plurality of slot connectors and an air shroud is provided. The mother board is stacked on the tray, and a top surface of the mother board is exposed. The computing device is arranged on the top surface of the mother board and electrically connected to the mother board. The slot connectors are arranged on the top surface of the mother board and arranged in parallel and at intervals, and the slot connectors is arranged adjacent to the computing device. The air shroud covers on the slot connectors and an external surface of the air shroud is extended toward the computing device to guide air to flow toward the computing device. Therefore, air flows through a primary heat source, the computing device namely.

Abstract: An expansion card holder for fixing an expansion card on a circuit board is provided. A connector is arranged on the circuit board and an end of the expansion card is coupled with the connector. The expansion card holder includes a carrier plate, a positioning buckle and a pressing block. The carrier plate is fixed on the circuit board, and multiple position holes arranged in a row are defined on the carrier plate. The positioning buckle is inserted in one of the position holes and engaged with the circuit board. The pressing block is inserted in another one of the position holes and engaged with the expansion card. The expansion card holder is thereby compatible with various sizes of expansion cards.

Abstract: An expansion card holder for fixing an expansion card on a circuit board is provided. A connector is arranged on the circuit board and an end of the expansion card is coupled with the connector. The expansion card holder includes a carrier plate, a positioning buckle and a pressing block. The carrier plate is fixed on the circuit board, and multiple position holes arranged in a row are defined on the carrier plate. The positioning buckle is inserted in one of the position holes and engaged with the circuit board. The pressing block is inserted in another one of the position holes and engaged with the expansion card. The expansion card holder is thereby compatible with various sizes of expansion cards.

Abstract: A converter includes a connecting block and multiple conversion modules corresponsive to each positioning slot. The connecting block has multiple positioning slots. Each conversion module includes a printed circuit board, and a positioning notched edge formed at an edge of the printed circuit board, and at least a portion of each printed circuit board is accommodated into the corresponsive positioning slot, and each positioning notched edge is latched and coupled to an edge of the corresponsive positioning slot, and each printed circuit board has a first connector and a second connector electrically connected to the first connector, and both of the first connector and the second connector are configured on both sides of the connecting block respectively.

Abstract: A converter includes a connecting block and multiple conversion modules corresponsive to each positioning slot. The connecting block has multiple positioning slots. Each conversion module includes a printed circuit board, and a positioning notched edge formed at an edge of the printed circuit board, and at least a portion of each printed circuit board is accommodated into the corresponsive positioning slot, and each positioning notched edge is latched and coupled to an edge of the corresponsive positioning slot, and each printed circuit board has a first connector and a second connector electrically connected to the first connector, and both of the first connector and the second connector are configured on both sides of the connecting block respectively.