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I would like to know if I can run three 4k monitors as follows:

  1. 120hz 4k via display port 1
  2. 60 hz 4k via display port 2
  3. 60 hz 4k via HDMI port

Below is my config

  • CPU: intel core i5 9400f
  • GPU: RTX2070 with 2 display ports and 1 HDMI
  • Motherboard: Asrock taichi z390
  • OS: Ubuntu 20.04 using nvidia-driver-450

EDIT: The actual graphics card is INNO3D GEFORCE RTX 2070 TWIN X2

Also, would this CPU be enough (no gaming; just programming) or should I look at upgrading?

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It depends entirely on the actual card & manufacturer.

NVidia don't make graphics cards, they make graphics chipsets. (The founder's edition cards are usually built by PNY).
The chipset from NVidia can do 4 x 4k displays… but only if the card manufacture built that support into their card.

The solution is to check the actual model spec on the card manufacturer's site, not at NVidia.

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  • Added details of my graphics card
    – Jus12
    Commented Dec 23, 2020 at 15:53
  • Then that's where you find your info. I don't see refresh rate mentioned anywhere & it only mentions max resolution & 'multi-displays'. You might have to dig deeper. the way they list the output ports, though, makes me think some of those are shared.
    – Tetsujin
    Commented Dec 23, 2020 at 17:09

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