Another thing you can try is to disable "Core C6 State" in BIOS, should be under CPU settings.
Well, did all of this and nothing changed :C. But when my friend hosted a game to check this out first minutes were without lags, I think its because we just started that after i did reboot. So i think maybe something else in my system causes it. But i really dont know how to track what it is.
EDIT: Tried to reinstall Network adapter driver it didnt help either.
EDIT2: And i figured out that SupCom FA through steam is working perfectly. So its just a FAF Lobby issue.
EDIT3: I did a test in a multiplayer game. Pressed F12 and there was a menu that shows who is bottlenecking. So when lag is happening i have 20 value in the "data" column, so its something wrong with data transfer i suppose. If i understand correctly.