As this issue seems to have been resolved with new drivers I'll mark this thread as solved now.
I reinstalled my gpu drivers and so far everything works as intented. I hope this was no coincidence.
No stuttering, ram usuage is still pretty high, but far away from over 90% and when I quit the game I get my ram "back".
How can gpu drivers cause such a problem?
i think its more of a problem with using a public browser for a game interface... they could have done it same way with no browsers... the game updates to battlelog player infos, stats etc. as you are playing... plus forum post etc. all update in the background of gameplaying...
thats alot of ways to leak memory
get rid of Battlelog on Browsers, and just code a browser into the game its not that hard for a big corporation like EA
