VRAM an acronym for Video RAM. Generally a term used in computers to describe RAM dedicated to the purpose of displaying bitmap graphics in raster graphics hardware. Video RAM is usually physically separate from the main RAM residing in a computer system. This is not always the case as in some systems the VRAM is shared with the system RAM. Look up RAM and random access memory in Wiktionary, the free dictionary Different types of RAM. From top to bottom: DIP, SIPP, SIMM 30 pin, SIMM 72 pin, DIMM, DDR DIMM Random access memory (sometimes random-access memory), commonly known by its acronym RAM, is a type of computer storage... For the use of the term raster in radio regulation, see frequency raster. ... Suppose the smiley face in the top left corner is an RGB bitmap image. ...

The term VRAM is used more specifically to describe a type of dual-ported RAM used in high performance raster graphics hardware. In a raster graphics system, the VRAM is called upon to constantly refresh the display, and at the same time be responsive to modifications from the host system. Dual Ported VRAM can provide data for the refresh system at the same time as allowing accesses from the host to modify data in that VRAM for higher performance. Dual-ported RAM is a type of Random Access Memory that allows multiple reads or write to occur at the same time, or nearly the same time, unlike single-ported RAM which only allows one access at a time. ...