Okay, completely on accident I managed to get the binary opengl supporting nvidia drivers to work with xinerama. A clean reboot was probably the key. ;P http://www.haxxed.com/random/openglmultihead.jpg HELL FREAKIN YEAH! Screenshot swappage killed the framerate, I get about 30fps at that point in the level, and ~50fps everywhere else, with a TNT2 Ultra in a 1024x768 window in 32bit color. The right screen is a TNT1 run by the stock nv driver, and the left screen is a 3dfx banshee. And the textures are gone because its competition settings. ;)