The Free On-line Dictionary of Computing (30 December 2018):

video random-access memory
video RAM
VRAM

    (VRAM) Fast memory designed for storing the image
   to be displayed on a computer's monitor.  VRAM may be built
   from special memory integrated circuits designed to be
   accessed sequentially.

   VRAM must be fast enough to supply data to the display
   electronics at the speed at which the screen is scanned.  Thus
   for example, for a resolution of 1280x1024 eight-bit
   pixels at a refresh rate of 70 Hz, the video memory
   would need to supply 1280x1024x70 = 90 Mbyte/s or one byte
   every 11 ns.  The VRAM may be dual ported in order to allow
   the display electronics and the CPU to access it at the same
   time.

   In an IBM PC the VRAM is located on the display interface
   card and 0.5 - 2 MB is typical.

   A VRAM Song (http://fweep.com/vram.html)!

   (2001-02-14)