Staggered Pin Grid Array (hardware) (SPGA) A style of integrated circuit socket or pin-out with a staggered grid of pins around the edge of the socket, positioned as several squares, one inside the other.
SPGA is commonly used on motherboards for processors, e.g. Socket 5, Socket 7 and Socket 8. See also PGA. [Better description?] Last updated: 1999-08-04