Well..it seems i manage to identify the problem..so it may be helpfull for others.
my hardware specs are :
i5 3570k
2x4gb kingston 2400mxz
here was the problem. before the patch i was able to play the game like everyone else...crashin gnow and then or having the fps bug.
after all went to hell

well..i was running the cpu and ram at their default specs. I remembered that in the past i encountered the same issue with some games - when you run the CPU and ram asynchronous. (i am IT engineer

So i got it tested - I set the ram to be synchronous with cpu clock..so actually underclocked my ram...and all crashes dissapeard. I got until now around 3h play without ANY crash ! So I could say I have found my issue.
Those who expperiment a lot of crashes should check the hardware settings.
have fun
