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Haswell/Iris Pro and Three Monitors

gte619n

gte619n

Member
Hey guys!

My workstation is getting a little long in the tooth and I'd like to upgrade to a Haswell based system in the future. My requirements are as small and quiet as possible, and I need to drive three monitors.

Currently, I'm using a 2U enclosure mounted on custom rails up under my desk, with a low-profile video card driving two monitors, with the third coming off the integrated HD3000.

I've seen some references to "three screen collage" and other things referencing three screen capability, but no technical information (max resolution, especially) seems to be available. Also, I'm curious to know if this is fed through the single DisplayPort and, if so, how (if?) I could connect my three DVI-based monitors.

Has anyone tested or seen any more information about this sort of setup?

Thanks!

E
 
That is very, very cool. 3840x2160... I mean, I'm currently running at 1680x1050!

Is eDisplayPort 1.2 the specification that allows you to daisy chain the monitors together, or is that Thunderbolt only?
 
gte619n said:
That is very, very cool. 3840x2160... I mean, I'm currently running at 1680x1050!

Is eDisplayPort 1.2 the specification that allows you to daisy chain the monitors together, or is that Thunderbolt only?
Click to expand...
You were correct with DisplayPort.🙂
 
Sounds like the motherboard would have to have all three interfaces, and they would all need to be independent of each other. As opposed to "You can use VGA or DVI."
 
gte619n said:
That is very, very cool. 3840x2160... I mean, I'm currently running at 1680x1050!

Is eDisplayPort 1.2 the specification that allows you to daisy chain the monitors together, or is that Thunderbolt only?
Click to expand...

I'm confused. Are you suggesting that using three monitors may require three displayport devices to be daisy changed?

I also wonder what this means for laptops. Theoretically I could just leverage my current DVI and HDMI displays as secondary/tertiary displays, as long as the laptop's built-in is driven from the display port. I have no idea how likely that is though.
 
I'm also interested from a laptop perspective. If it has an eDisplayPort, could I drive three monitors off a single port that way? My laptop is ancient and my workstation is getting up there. It would be great if I could just combine the two. From a performance perspective, I think the modern mobile chips would be fine, but it's the display issue that's holding me back.
 
If you want to use the DP alone for 3 monitors, you would need an MST hub to split the video output from the motherboard to the three monitors, or a monitor with MST hub built in for daisy chaining.

http://us.hardware.info/reviews/470...ee-monitors-on-one-displayport-output!-tested
Haswell's DP output should then work fine.

If you want to use 3 outputs from a Haswell IGP, you don't need to use DP/daisy chaining/an MST hub if you can connect each display to a different port, but it depends on the motherboard not the processor.
See: http://www.hardwareluxx.com/index.p...intel-core-i7-4770k-and-i5-4670k.html?start=2 There is a table part way down with the various combinations that can be offered, but it requires the motherboard to offer them.
 
Last edited:
@Lonyo,

That's exactly what I'm looking for! Thanks for the link, seems like the DP Hub is the way to go. Could even use my old monitors!
 
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