While I had the Vertex Buffer Objects setting from Preferences -> Hardware Options enabled, my framerate was very low. I thought it's normal, but once I disabled VBO I won 5 more framerates in areas with a lot of primitives, which means that on some graphics cards which are new and modern models VBO actually reduces performance. My issue is with ATI Radeon series, so please fix this for them and any other graphics cards as I heard there are many which have this problem with VBO. [EDIT] - I should post some more detail about this by now. The problem that occurs when VBO is enabled is that looking to your left / right or behind you hiccups the client a lot... from what I'm seeing until the primitives are loaded / cached. Once I looked into a certain area and all prims are loaded in my FOV, moving my mouse around just a little doesn't give any low framerate. However if I turn my head in a different direction and many new primitives are shown, the framerate is very low. Overall moving and looking around with VBO enabled is really bad.