Well think ive got to the bottom of it, the setup in Building 3 is 3Com switch with fibre then 2 switches that connect to this. Copied a file when plugged into 3com without fibre 7 min 28, but a direct connection into the 3com switch with the fibre less that 1 min. So Im 99% sure that is the root of the problem, my least fav job is changing switches :-(