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I've read that DisplayPort supports multiple monitors. My question is how can I connect 3 monitors with one display port, is there such a splitter? I have 2 DVI monitors and one VGA (which I could use DVI to VGA convereter)

If I could do it, will I be limitted by the GPU? Is it possible that my GPU only allow for 2 monitors?

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2 Answers 2

up vote 11 down vote accepted

The DisplayPort Spec supports the daisy chaining of multiple monitors, but not the splitting of the signal. Unfortunate, to support this you need to have at least 2 DisplayPort equipped monitors that support daisy chaining (of which there are none to my knowledge).

Given your situation, your best bet would be something like the Matrox TripleHead ToGo, which allows you to connect multiple monitors to a single port (and tricks your computer into only seeing one while spreading the image across several).

Using a solution like that, your main limitation is the power of your graphics card and how many pixels it can render well.

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He is correct. Both ends of the connection also have to support DisplayPort 1.2. (en.wikipedia.org/wiki/DisplayPort) –  peelman May 11 '11 at 19:32
    
Actually, according to their FAQ: A PC with one DP connector is driving two monitors via daisy chaining. The 1st monitor is a DP v1.2 monitor with input and output connectors. The 2nd monitor is a DP v1.1a monitor. DP v1.2 PC—> DP v1.2 monitor with in & out connectors—->DP v.1.1a monitor. –  Matt Voboril Feb 7 at 19:54
    
@MattVobori what happens if you use a legacy non-DP (VGA/DVI) monitor as the 2nd monitor by connecting the 1st monitor to it via DP monitor 1<---> DP-in to VGA/DVI adapter<--> non-DP monitor 2? I'm guessing it won't work but thought I would ask anyway.. –  prusswan Jul 3 at 11:39
    
From my usage, it didn't work. –  Matt Voboril Jul 3 at 17:30

DisplayPort 1.2 supports daisy-chaining like this in the spec, but I am not aware of any products on the market that currently support it, either on the video card side or the monitor side. I expect you'll see them in the next year or so, though, now that the specifications are official (and I believe there are already controllers entering production).

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Also note that DisplayPort -> VGA isn't possible without an expensive active converter. While DVI can carry digital and analog signals, and so can convert either way passively, DisplayPort is digital-only. –  Shinrai May 11 '11 at 19:33
    
Pretty sure its 1.2 that supports daisy-chaining. They didn't bump the bandwidth in 1.1. reghardware.com/2009/01/13/displayport_1dot2_basics and $16 isn't what I would consider an "expensive" converter: monoprice.com/products/… –  peelman May 11 '11 at 19:34
    
@peelman - It is 1.2. I edited that before you posted, it was a typo. SE really should flash a notice when something you're responding to changes. :/ –  Shinrai May 11 '11 at 19:54
    
@peelman - Also, Monoprice is fairly unique in their low prices for this sort of thing (even they list it at a $50 "normal price") and so for persons who either don't want to or can't do business with them (mostly persons outside the US, I would suspect) I would indeed call something from anybody else expensive. –  Shinrai May 11 '11 at 19:57
    
Yeah, i see that now :-\ apologies for the too-fast correction. –  peelman May 11 '11 at 20:15

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