While OpenGL works great for me in terms of sheer performance, I am plagued with OpenGL memory issues that tend to hit after KSP has been running for a bit with OpenGL forced. Have been searching for a resolution for it but haven't found anything yet. When I check my event log for info on the eventual crashes it just says --- The NVIDIA OpenGL driver has encountered an out of memory error. This application might behave inconsistently and fail. First time I've ever encountered the error, and strangely enough it's only happening with KSP in OpenGL mode. Current video card is a GTX970 SSC running under Win7X64, and there had been many reports of stability problems under the last driver. I updated to the most recent 344.48 reference driver hoping it might solve the problem, but sadly it has not.