hello

thanks for your answer, i have install the matrox soft and i 'm using the OUT2 of ATI at 3072x768 refresh 60Hz and then on the triple head i have 3 X 1024x768 at 60Hz, all work fine with monitor DVI but when i change one monitor with a LED PANEL "starframe" with a STARGATE, then no signal come on this OUTPUT.
I would like to install SwitshResX to force refresh and resolution of the OUTPUT. but i don't know the good info of the EDID of the led panel...
I think the big problem is the Stargate witch control LED PANEL and the "EDID" of them...
no one use this led panel ?

thanks averybody

Yves