Video random access memory

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GDDR5X SDRAM on an NVIDIA GeForce GTX 1080 Ti graphics card

Video random access memory (VRAM) is dedicated computer memory used to store the pixels and other graphics data as a framebuffer to be rendered on a computer monitor.[1] This is often different technology than other computer memory, to facilitate being read rapidly to draw the image. In some systems this memory cannot be read/written using the same methods as normal memory; it is not memory mapped.

Description[edit]

Independent system RAM and video RAM
Unified memory
A GPU die surrounded by VRAM chips

While a computer has system RAM, most contemporary graphics cards have access to a dedicated set of memory known as VRAM. In contrast, a GPU which shares system memory has a Unified Memory Architecture, or shared graphics memory.

System RAM and VRAM has been segregated due to the bandwidth requirements of GPUs,[2][3] and to achieve lower latency since VRAM is physically closer to the GPU die.[4]

Modern VRAM is found in a BGA package[5] soldered onto the graphics card.[6] Like the GPU itself, the VRAM is cooled by the GPU heatsink.[7]

Technologies[edit]

See also[edit]

References[edit]

  1. ^ Foley, James D.; van Dam, Andries; Feiner, Steven K.; Hughes, John F. (1997). Computer Graphics: Principles and Practice. Addison-Wesley. p. 859. ISBN 0-201-84840-6.
  2. ^ "What is VRAM: The Memory Power Behind Real-time Ray-Tracing".
  3. ^ "Relationship Between RAM and VRAM Bandwidth and Their Latency".
  4. ^ "RAM vs. VRAM: What's the Difference?". makeuseof.com.
  5. ^ "Encapsulated in CPUs, GPUs, RAM and Flash: Types and Uses".
  6. ^ "Graphics Card Components & Connectors Explained".
  7. ^ "Different Types of Graphics Card Cooling Solutions for GPU, VRAM & VRM".
  8. ^ "VRAM vs RAM | Differences & Applications". TechDim.
  9. ^ "GPU Framebuffer Memory: Understanding Tiling".