Riser Cards
Riser cards are boards containing one or more additional sockets for expansion devices. Risers are inserted into the mainboard with an edge connector methodology. They are oriented in a perpendicular fashion to the main board, which means that when other components are inserted into the riser card socket, they maintain a parallel relationship with the main board. This is an advantage when there is limited space between the plane of the main board and the casing. Many modern expansion devices are so large that they cannot directly be placed on the main board.In the consumer market, this is rarely needed as the expansion devices for the average desktop are not advanced or powerful enough to require the additional board space. However, for modern servers they are quite common. They produce a stacked effect for the boards within the system case, providing a very space efficient mechanism for the server assembly. The riser cards take a signal from the main board using a broad length of signals and distribute them to whatever number of slots it contains. These expansion slots can be anything from PCI and PCI express to older AGP technologies. 더 읽기 읽기 안 함