Do you have a question? Post it now! No Registration Necessary. Now with pictures!
- Posted on
January 30, 2008, 7:32 pm
rate this thread
I want to know if this is possible without any additional hardware, I
have Dell D620 which has 1 VGA and 1 DVI.
I can at a time run two of the monitors but not all three, in the
display properties of Windows Vista at a time I am only seeing 2
displays (not three) even if I trun all the monitors on.
I can either run Laptop LCD with one external LCD or both external
LCD, at the end only two monitors are running at the same time.
I want to use 3, anybody knows if this has anything to do with a
software configuration or I need an additional hardware (I really dont
want to invest anymore money :) )
Re: 3 Montiors on Laptop (2 External, 1 Laptop LCD)
I don't know about that laptop specifically, but this restriction is
pretty common among graphics cards for desktop systems. If you look at
midrange or higher-end cards, you'll often see two monitor outputs (VGA
or DVI or a mix) plus a NTSC or PAL video output. You can pick any two
to use at once, but not three. The problem is that each video output
signal requires a certain set of hardware resources to generate, and the
chipset has only two copies of some of them (e.g. timing controller,
video lookup tables, DACs, etc).
So there's *likely* nothing you can do to have 3 independent displays on
your laptop, short of adding another graphics system (e.g. a
USB-connected external video system).