Eh, my modem syncs at the full 20 Mbps line rate for upload, I can't help that some of that gets eaten up in overhead for framing and error correction and other

Eh, my modem syncs at the full 20 Mbps line rate for upload, I can't help that some of that gets eaten up in overhead for framing and error correction and other such things. You usually don't even get a full 1 Gbps with gigabit fiber either.