Richard hello sorry for the delay, I installed a GTX 285 version (windows bios) card instead of 4000 for the big picture with 6 LED outputs to 1280 x 1024, the measure of the total mixes is 6x1120x760 each, the machine is very good, not sin to use the card quadro 4000 with 2 triple head . I added a twin machine with geforce gt 8800per backup. As soon as I send you photos of the large LED. Thanks to all for your support, the other machine with the card quadroon 4000 with a single dvi triple head is very good, the machines are used x the festival of Italian song (San Remo) I forgot ,I have 2 ati 5870 cards on the shelf, nothing new from the ati?