(
Synchronous
Graphics
RAM) A memory chip that includes enhanced functions for graphics rendering. For example, Block Write is used to fill large areas with a single color, and Mask Write is used to change selected memory locations. GDDR memory was first called "GDDR SGRAM" but was later known as "GDDR SDRAM." Although single ported, SGRAM simulates the dual-ported technologies of other video RAM technologies. See
GDDR,
WRAM and
VRAM.