Video random-access memory
Video random-access memory (VRAM) is dedicated computer memory typically used to store graphics data (such as framebuffers) for a GPU.[1] VRAM differs technologically from other RAM, as VRAM is optimized for being read rapidly to draw images.
Relation to GPUs
Independent system RAM and video RAM
Unified memory
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Most modern GPUs rely on VRAM. (In contrast, a GPU which does *not* use VRAM, and relies instead on system RAM, is said to have a Unified Memory Architecture, or shared graphics memory.)
System RAM and VRAM have 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 typically found in a BGA package[5] soldered onto a graphics card.[6] The VRAM is cooled along with the GPU by the GPU heatsink.[7]
Technologies
- Dual-ported video RAM, used in the 1990s and at the time often called "VRAM".
- SGRAM
- GDDR SDRAM
- High Bandwidth Memory (HBM)[8]
See also
- Graphics processing unit
- Tiled rendering, a method to reduce VRAM bandwidth requirements[9]
References
- ^ 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.
- ^ "What is VRAM: The Memory Power Behind Real-time Ray-Tracing".
- ^ "Relationship Between RAM and VRAM Bandwidth and Their Latency".
- ^ "RAM vs. VRAM: What's the Difference?". makeuseof.com.
- ^ "Encapsulated in CPUs, GPUs, RAM and Flash: Types and Uses".
- ^ "Graphics Card Components & Connectors Explained".
- ^ "Different Types of Graphics Card Cooling Solutions for GPU, VRAM & VRM".
- ^ "VRAM vs RAM | Differences & Applications". TechDim.
- ^ "GPU Framebuffer Memory: Understanding Tiling".