Dual Monitor on iMac (Intel)

Discussion in 'iMac' started by PiTT, Sep 15, 2006.

  1. PiTT macrumors member

    Nov 1, 2005
    Milan, Italy
    With a LCD connected by DVI, can I turn off the iMac display and use only the external screen ?
  2. iPhil macrumors 68040



    Can't turn off the internal screen,you'll be able to span or mirror the main display on the external screen
  3. nagromme macrumors G5


    May 2, 2002
    The closest thing would be to mirror, and turn the brightness of the internal display to zero. The LCD pixels may still be getting power, and the GPU may still be doing extra work (I know my old PBG3 was slower when mirrored--may no longer be true) but the backlight will be off.

    I do that sometimes when watching movies on TV--it's distracting to have them also be on my PowerBook screen at the same time.
  4. hdsalinas macrumors 6502


    Aug 28, 2006
    San Pedro Sula, Honduras
    Is there any software to manage what screen gets turned on?
  5. mrgreen4242 macrumors 601


    Feb 10, 2004
    Trouble with this option (turning down the built in displays brightness) is the VRAM gets split between displays, so you will only effectively be using 64mb (or 128mb depending on the model) of VRAM.

Share This Page