I just bought the game a few days ago, changed the settings so it runs smooth. I connect to a server and the game runs fine until that one moment, when the screen just freezes for 1-2 seconds, after that I keep having major lag and the graphics start looking horrible, you can see polygons of the arms coming through shirts/jackets same for head, and overall player model looks like a model in games from the 90s. the textures of buildings become blurred and extremely low detailed, when entering a building the walls and everything that belongs to the building just disappears, only the items inside the building remain visible. it's lagging so much that it feels like I am suddenly forced to 5FPS. I tried like everything to enhance performance but it still happens. and well it's not the tweaking since it runs fine until that happens. it sometimes happens after a few minutes, sometimes after 20 minutes, sometimes when getting close to a village, sometimes inside buildings. I noticed that it's gone after I go to settings and enable/disable vsync but soon there after it happens again and again and again. it also seems like it happens more often after trying to fix it (by enabling or disabling vsync) when it first appears. it's really really annoying because you never know when it happens the first time and getting killed by a player or zombie just because you are lagging like crazy. I haven't seen any solution so far, I've been looking for answers since yesterday, but nobody seems to have the exact same problem. my computer: Intel i5-2500k @ 3.30GHz 3.60GHz 16GB RAM NVIDIA GeForce GTX560 edit: yes I tried different graphic settings. like disabling stuff, changing from high to low and back etc nothing helps it keeps happening Windows Vista Ultimate, 32bit