Hi, as pointed out in other threads, I am currently assembling a machine with five nVidia cards. The machine and the cards are fast enough to render a steady 60fps, synced to vblank. But this is only with shaders disabled. The moment, I enable shaders and 3d- clouds, the frame rate drops to 20fps and sometimes even less. This does not happen when I limit the display to just one single GPU. One GPU with dual screen ("TwinView") runs at framerates beyond limits even with all shaders on and quality level to highest. The moment I add a second card to the setup, it slows down significantly. I know that shaders are little program fragments running on the GPU itself. Now, what happens, if a shader effect spawns multiple GPU's, e.g. a cloud which is visible across the entire window?
Cheers, Torsten ------------------------------------------------------------------------------ Nokia and AT&T present the 2010 Calling All Innovators-North America contest Create new apps & games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel