📎 AI Summary:
The thread discusses the possibility of adding a third monitor to a PC, with the original poster wanting to use the HDMI output to stream and mirror their desktop to a TV in another room via network cables. The responder clarifies that Windows typically allows either extended displays or mirrored displays, but not both simultaneously for the same output, suggesting the use of a port mirror device as a potential solution. Overall, the conversation centers on configuring multiple displays and exploring options for mirroring or extending screens.
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kiwis

Active Member
Joined
Nov 7, 2018
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2
Thread Author #1
I want to instal a 3rd monitor on my PC.

My idea has been to use my existing VGA and DVI connections on my desktop as an extended desktop but use my HDMI output for my 3rd screen. I'll send it through my cat6 ports and cables to my bedroom TV.

I want that screen to mirror one of my desktop screens so I can see what I'm doing and play video etc from my desktop then go watch it in my bedroom.

If this can't be done, can I see my 3rd screen somehow or with some app on screens 1 or 2?

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Neemobeer
Well a game should only full screen on a single monitor (I believe your primary), so you could have other programs open on the second screen as well. You can't mirror and extend your displays it has to be one or the other, but you can buy a port mirror and duplicate the output to multiple screens. Something like this Link Removed
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Neemobeer

Neemobeer

Windows Forum Team
Staff member
Joined
Jul 4, 2015
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8,995
#2
Well a game should only full screen on a single monitor (I believe your primary), so you could have other programs open on the second screen as well. You can't mirror and extend your displays it has to be one or the other, but you can buy a port mirror and duplicate the output to multiple screens. Something like this Link Removed
 

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