Memory Bandwidth Calculator

Estimate theoretical memory transfer bandwidth.

About the Memory Bandwidth Calculator

This estimator converts transfer rate and bus width into a theoretical byte rate.

How to use it

  1. Enter MT/s.
  2. Enter bus width and channel count.
  3. Calculate decimal MB/s and GB/s.

Formula

Bandwidth equals MT/s times one million times bus bits divided by eight times channels.

Example

3,200 MT/s on a 64-bit bus with two channels gives 51.2 GB/s.

Notes

Protocol, controller, access pattern and workload reduce real delivered bandwidth.