An expansion card is an extension of the card in the IT sector, it is a printed circuit board in the expansion slot is that the motherboard, so they can add additional functions on the computer system. The size of the expansion card is to respond exactly the location that had been provided. The Peripheral Component Interconnect is the computer bus of the possibility of computer peripherals to the computer motherboard. The two forms that the devices can take are the integrated circuit and the expansion card. The ports of the bracket, that all external links on the map. Nearly one to seven PCI expansion cards can be added to the computer in terms of form factors and the nature of the case mother board.