If you have a 10GbE NIC your transfers should be much higher than a 1GbE. If using the 1GbE NIC's you can also try to use the Jumbo Frame option from the Console screen by entering CTRL + ALT + W then Tuning options there you will see the Jumbo Frame Config settings.

Refer to the specifications of your NIC, typically they are 9000 but can be 9014 also keep in mind to set the host and the switch for these frame settings as well.