Be descriptive; you're copying from point A to point B. What is point A and what is point B? Are both over the network, are both to the same server, are both to the same volume?
Are you using gigabit networking, did you enable jumbo frames, are you using tagged command queueing, etc.
Also, could you post some benchmarks, like ATTO, AS SSD, CrystalDiskMark.