There is Realtek RTL8111E PCIE Gigabit LAN chip on this MB.
And i cant change settings " TCP checksum offloading" (and simular) - its always off. If I change to "tx/rx enabled" and save settings for next time its again "off".
I try many drivers: old (2011 year) and new 2014.07 - no changes.

Anybody can advise me something?