The benchmarking I had done had the [non-offloaded] bandwidth peak out around 2.5-3Gbit/s. Could have been trouble with the drivers, or a naive implementation,

The benchmarking I had done had the [non-offloaded] bandwidth peak out around 2.5-3Gbit/s. Could have been trouble with the drivers, or a naive implementation, or any of a number of things. Didn't dig into it too deeply at the time as the offloading drivers worked fine.