Every system needs an update after a while.. Our CAVE has aged a lot since its first run. Beside that, it could not handle 6 display devices (2 projectors / walls) with same 60 FPS and same synchronicity.
So we decided to update our configuration and successfully replaced old nVidia Quadro cards and old Sync board with 2x Quadro P4000 + Quadro Sync2 board. As Frank Pudlowsky from nVidia (Mosaic Technology expert) suggested, we used a single rendering thread on our 6-screen Mosaic display set.
The performance is amazing, check our videos about a supercharger 3D model which has more 10 million polygons. (If you notice any lagging, that's because our head tracking hardware is very old and could not recognize smaller movements.)