Stuff like that isn't standardized for Windows - each NIC manufacturer does their own thing.  NVidia might have a set of network utilities, bundled with the drivers or a separate download.  I've found Intel makes the best wired NICs - they have a utility, PROSet that let's one look at such things, but only for their NICs.  You could also sift through the Windows registry for settings, but that's a long shot.