Do you know the reason for Realtek to still provide "not support power saving" drivers? Old drivers before they've implemented the "power saving" feature didn't allow the CPU Package to hit the C8 power state (it was limited to C3 only) which has a measurable impact in battery life. That's such a crucial feature that every laptop owner with a Realtek network adapter should upgrade the drivers ASAP, even if they are not using the ethernet adapter because just by having the driver loaded it's enough to limit the CPU Package C-states to C3 maximum. (use hwinfo of throttlestop to see that). Did anyone reported issues with these newer drivers that got solved by using the "non support power saving" variant?
@Hasefroch You can use the one with or without power saving. The only difference is, that the power saving feature is directly "disabled" when you install the "not support power saving" driver. When you install the standard driver you can disable the power saving in the driver-settings in device manager of windows. Just double click the device in device manager and go to advanced tab then look for "Power Saving Mode" and set it do "disabled". You can disable "Green-Ethernet" then too.