Ok, status report: I played for a good hour now, and I noticed some things. At the beginning it worked quiet well. No heavy lags, no nuclear frame drops, everthing worked normal. Not good, but normal. Let's say playable. I spawned in berenzinho, so i lootet there. In the town I got more heavy lags, sometimes freezes for around 5 seconds. Then i ran up the coast, everything worked fine, i had the best fps, seen for a long time - until i entered the large habour up north. There nothing worked anymore. Freezes for arounf 15 seconds, textures didn't load und closing the game took another 10 minutes. I tried it with that cache cleaning, but it only worked for a short time, allways when i tried it.