Short for video RAM, and pronounced vee-ram, VRAM is special-purpose memory used by video adapters. Unlike conventional RAM, VRAM can be accessed by two different devices simultaneously. This enables the RAMDAC to access the VRAM for screen updates at the same time that the video processor provides new data. VRAM yields better graphics performance but is more expensive than normal RAM.
A special type of VRAM, called Windows RAM (WRAM), yields even better performance than conventional VRAM.