Source : Free On-Line Dictionary of Computing

Synchronous Graphics Random Access Memory
     
         (SGRAM, Synchronous Graphics RAM) A type of
        {Synchronous DRAM} optimised for use in {graphics} hardware.
        Extra features can include {burst operation}, {block write}
        and {write per bit}.  SGRAMs are designed to provide the very
        high {throughput} needed for graphics-intensive operations
        such as 3d {rendering} and {full-motion video}.
     
        (1996-11-28)