OpenGL decreases ram usage dramatically (~50% less) and increases fps a bit on large vessels (i can view my 500+ parts space station in 60fps, high graphics settings). However, i get some weird graphics glitches (whole screen flickering, parts of the screen went black after loading and some other things). Switching to other windows and back fixes most of them, but not all OS: Win 8.1 CPU: i7 4790K GPU: nVidia 760GTX RAM: 8GB I have Linux installed, too. Performance is really bad there (1-2 fps in KSC overview )