Hi there,
You will never be able to utilize the whole gigabit connection, at least with the current tor version.
I'm also running 2 tor nodes (00000000000myTOR) on a single machine (3rd gen Core i, Quad Core /w AES-NI) on an single IP,
reaching ~1.3 Gbit/s on an 1000 Base-T FD connection. Since you do not use hardware accelerated crypto,
your transfer speed should be much lower. Anway my relays are also cpu limited due to the fact that tor isn't
really utilizing much more than one cpu core.
- Christian