Why am I only getting ~400Mbps Tx or RX TCP traffic between CCR's and ~250Mbps aggregate TCP?

Is this a limitation of the bandwidth test, or is there a known issue?

This is tested on the bench with 1' CAT5e UTP / CAT5e FTP / and CAT6 cables. Same results all around.

Also the single direction bandwidth test seems to taper off from 400mbps down to 250Mbps as it runs.

CPU never goes above 2-4%.

in tcp, try to adjust tcp connection count

yeah.. i bumped it up to 40 and still the same result.