This the same as I have found and as of yet cannot correct.
Mutiple NUC products - 10-11 MB/s file transfer rates over a Gigabit LAN connection
Switch to another Windows PC with Gigabit Ethernet and 60 - 110 MB/s. ... This on the same network, same source and even the same connection.
The NUC looks like it is operating as Fast Ethernet and not Gigabit.
Again, All NUC BIOS and driver updates installed, Network adapter manually set to Gigabit with full duplex!
Something is wrong here ... it happens on 3 different NUCS all purchased in the last 3 weeks.
Otherwise the NUC units have been fantastic.