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I'm an avid user of multiple monitors and have been contemplating an upgrade to a couple of 4k monitors. However I'm not sure how to interpret my video card specs or the specs of other cards I might have to get. Most cards specify the maximum resolution, but it isn't readily apparent whether this is per display or an overall maximum renderable area.

For example I have a card based on the GTX 650 Ti chipset that claims to be able to drive 3840x2160 at 30Hz. This is the size and speed of the monitor I was looking at—bit while my card has four outputs, somehow I wonder if it is up for driving 2ea 4k displays. Would that spec resolution be per-display or an overall total across multiple displays?

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I'm sure there are exceptions to this depending on the system, OS, and approach used in general, but I'm going to have to go with, as a general rule, saying that resolution is on a per display basis. I remember using a 19" CRT running 1600x1200, with a 15" @ 1024x768 way back, having two gfx adapters with Windows 2000.

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    Your anecdotal evidence is exactly the opposite of what I'm asking. I have one GFX adapter, and in fact a typical way of using the DVI ports on these sorts of cards is in a dual-link configuration.
    – Caleb
    Commented May 17, 2015 at 18:46
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    @Caleb I did the same with a single GFX card with two outputs, and I was able to set individual resolutions for each of them.
    – Jarmund
    Commented May 17, 2015 at 19:06
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    up to a total the max speced res of the card on each port or up to a total where the overall rendered area is less than the total max spec?
    – Caleb
    Commented May 17, 2015 at 19:11
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    @Caleb I cannot say, my resolutions bottlenecked at both of the screens. I think I remember the card advertising up to 2048xSomething
    – Jarmund
    Commented May 17, 2015 at 19:16

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