It's nearly impossible to get anywhere near 480 Mbit/s out of USB2. Not only will you normally get maybe half that in ideal situations, you'll churn a ton of CP

It's nearly impossible to get anywhere near 480 Mbit/s out of USB2. Not only will you normally get maybe half that in ideal situations, you'll churn a ton of CPU pointlessly. USB's interrupt-driven nature is terrible for pretty much everything but Human Input Devices.