Engineering tool
Interface Bandwidth Calculator
Check whether the acquisition you have specified fits the interface — before the cable is pulled.
Output
- Bytes per frame
- 5.01 MB
- Per camera
- 150.4 MB/s
- Total (all cameras)
- 300.8 MB/s
- Total in Gb/s
- 2.41 Gb/s
Practical interface envelopes (estimates)
- USB3 Vision (5 Gb/s)~350 MB/s · within envelope
- 1 GigE Vision~100 MB/s · over budget
- 5 GigE Vision~550 MB/s · within envelope
- 10 GigE Vision~1100 MB/s · within envelope
- CoaXPress CXP-6 (single link)~600 MB/s · within envelope
- CoaXPress CXP-12 (single link)~1200 MB/s · within envelope
Formula
bytes_per_frame = (width × height × bit_depth) ÷ 8 ; MB/s = (bytes_per_frame × fps) ÷ 1e6 ; total = MB/s × cameras
Frequently asked questions
- Does fitting the interface mean the system will keep up?
- No. Sustained throughput also depends on host CPU and PCIe capacity, driver and buffer configuration, storage write speed, and how much processing happens per frame. Interface headroom is necessary, not sufficient.
- How much headroom should I leave?
- Plan on running well below the theoretical link rate. Protocol overhead, packet resend behavior and shared switching all reduce usable bandwidth, and multi-camera systems rarely divide a link cleanly.
Related engineering material
Next step
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