I try to max out the last classic MacPro for my Modul8/Madmapper setup, so I flashed an AMD Radeon HD 7970 (standard output layout) with the proper rom - bootscreen, using 4 outputs, everything works fine. But when I use more than 2 outputs on the card with MM or M8 performance drops from 25%Gpu/60fps to nearly 100%Gpu/15fps or something (memory nearly empty in both cases). If I use a triplehead to get more than 1 projector everything is fine. Seems the card is moving content to another output framebuffer on a very slow way or something like this..
Of cause this is not a problem of MM or M8, but maybe anyone has an hint/solution/experience for this? Or maybe there are some recommendations for a powerful gpu? Anyone some experience using newer Nvidia cards with webdrivers?
So thanks in advance for some hints or discussion,