I recently purchased a used MacPro 5,1 with the ATI Radeon HD 5770
There are 2 MiniDisplay Ports and 1 DVI port.
However, when I hooked up my 3 monitors, the signal was only transmitted out of the MiniDisplay
I am using standard 1080p resolution and connecting the monitors via HDMI.
Please let me know if this is possible or what, if any, is a workaround.