Memory Bus Width
Memory
DEFINITION
The number of bits that can be transferred simultaneously between the GPU and its memory, measured in bits.
OVERVIEW
Memory bus width determines how much data can be transferred in parallel between the GPU cores and VRAM. Wider buses allow higher bandwidth, reducing memory bottlenecks.
TECHNICAL DETAILS
Common bus widths are 128-bit, 192-bit, 256-bit, 384-bit, and 512-bit. High-end GPUs often use 384-bit or wider buses. HBM (High Bandwidth Memory) uses extremely wide buses (4096-bit or more) to achieve very high bandwidth. Bus width, combined with memory clock speed, determines total memory bandwidth.
COMMON USE CASES
- Memory-intensive AI workloads
- High-resolution texture streaming
- Large batch processing
- Graph neural networks
- Scientific computing with large datasets