The MX64 is software limited to 250Mb/s.  It wont go past that.  The software wont allow it.   Consider getting an MX67.  It is software limited to 450Mb/s.  Paying the extra to go from 450Mb/s to 600Mb/s would mean going from an MX67 to an MX100 - and it's probably not worth the money.   We use an MX67 in our office and it works great. ... View more