I use original network card Intel 82574L (EXPI9301CTBLK). After the upgrade, with the built-in "Windows 7 x64" driver 11.0.5.22 to the last 12.7.28.0 there are delays in downloading web pages. There is a general slowdown. Why are there new drivers slow down? After roll back to version 11.0.5.22 everything becomes normal.
PS And in the driver confused modes FullDuplex (Half) and HalfDuplex (Full).