Equipment. We are building a rig which will have eight ACD 23" monitors running off a Mac Pro (2009) 8-core via four video cards. Currently at three monitors and one video card. The setup is for a specialized use, but is also to be used for more standard applications that do not need all those screens. Problem. The current setup already uses about 395W and this will increase with more monitors and video cards. Is there a way to turn off all but one (or two) ACD monitors (and the unused video cards) when not required? The latest Display page in OS-X 10.5.7 System Preferences has removed the option to turn off a monitor (and not the Mac Pro itself) via the side button. Tried turning off the power supply, but this is bad for the monitors, is impractical and causes other problems. No rear-monitor USB2 or Firewire400 ports are used (for now). Solution. Any ideas?