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The list of pains this setup would cause is more than 3
(thelemmy.club)
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this post was submitted on 27 Jun 2026
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What kind of hardware do you need to run 15 screens?
The main limitation here is number of monitor ports.
Applications that use this many screens aren't running a high level of graphics. Even a bunch of camera feeds aren't going to strain the GPU.
Four GPU's with four outputs each would do it.
You'd only need a main board with for x16 physical slots as PCIe x4 would be sufficient bandwidth for desktops.
You're also not pushing the GPU's power envelope, so one beefy or two smaller PSU's would suffice. The AMD WX7000 series workstation cards don't even have the extra PCIe power connectors (last time I looked).
I suspect these are more likely to be two or more machines though.
Matrox makes some crazy multi-monitor GPUs that could do this without needing as many cards.
Here's their 8-display version:
AMD GPUs used to be really good at this. Not sure how well it works nowadays, with generally higher resolutions and thus higher bandwidth requirements. I'd imagine it involves a lot of trial and error with displayport chaining.
Matrox cats are even better. 8 displays per card.
TIL Matrox still exists. I think I used to have one of their cards in the 90s, but I don't remember which.
A modern computer can easily fit 4 low-end GPUs plus the onboard one. Most things that used the slots are onboard the motherboard or USB now.
That's not what it looks like in my PC, but I guess you might be right. Although it seems that most motherboards, people can actually afford come with far fewer full PCIe slots.
If you can afford 15 huge monitors, you can splurge on the motherboard with extra PCI-E slots.
A NASA level computer specs.