Game lagging after the update

Since the update a couple days ago, the performance has gone down the drain, somehow only affects online games, especially UT. 

With the initial patch the performance was running mostly (sometimes laggy in corners) and after the update the online modes have become almost totally unplayable, it usually starts out ok then at a random time (sometimes corners, sometimes halftime or a goal) the game completely tanks, all the connection symbols indicate that everything is ok but the input has a 1s delay and all animation become choppy. After this has been triggered in the game its mostly over for that game (sometimes randomly messing with settings fixes it until the next stoppage of play but then it has the same effect). 

I ve messed around with a lot of the settings (both in-game and nvidia control) but nothing seems to be working.. The patch made the game unplayable while claiming to fix this same problem for others..