http://bugs.winehq.org/show_bug.cgi?id=22064
--- Comment #57 from Mikko Rasa tdb@tdb.fi 2010-08-29 23:33:12 CDT --- VRAM size can be set from HKCU\Software\Wine\Direct3D\VideoMemorySize. Wine has some code to guess it based on OpenGL vendor and renderer strings, but if it doesn't recognize your card, it falls back to a rather low amount.