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Well that depends on how you are remote accessing.
For example, With MS's RDS your displays are driven by the remote machine.
With Google's your resolution and number of monitors is driven by the host machine.
Horses for courses.
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Funny - it was only a couple weeks ago I found out that none of my remote team in India and Bangladesh were using dual displays, so I had them all go out and buy large monitors so they could have two monitors - their laptop screen and their external monitor.
Then, 2 days ago, I was on a remote session with one of my guys and it looked like he was using only his laptop screen. He assured me that he was using his beautiful large monitor (32 inches), but the resolution looked terrible. But it was clear that he was using only one monitor.
Turned out, he dutifully plugged in his monitor and then closed his laptop, using an external mouse and keyboard, forcing the external monitor to the same crummy resolution of the laptop. We went through the steps to show him how to use both simultaneously, which tripled his working desktop space - double resolution on the external monitor and then the original laptop. We put the debug window on the laptop, ran his program, and instantly found that his web system was making an extra extraneous SQL call for every action and a separate bug where a server call was being made when the data was already in memory.
I cannot overstate the benefit of being able to have a live console output/debug log for applications, especially web apps.
And for me, using double/triple monitors for years, don't care what the outputs are. VGA, DVI, HDMI, Display port - my primary tasks are writing and coding, so speed has very little concern for me. Once I needed a dual DVI cable to get a better resolution on my ultra-high res monitor, but that was it.
<hr>
"Qulatiy is Job #1"
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That's an "attaboy" post if I ever saw one.
Agreed wholeheartedly, I've been using at least dual-displays for over a decade, and there's just no going back. A laptop is just something to get by when I'm away from my desk. There's just no way I could sit down and try to do something useful with one display.
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David Carta wrote: I had them all go out and buy large monitors so they could have two monitors
Wow, your employees are very lucky. Most employers in my experience would take severe grovelling to agree to budget for new hardware like that.
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Probably a benefit of having a CEO who started the company as the primary developer.
IMO, hardware expenditures, even extravagant ones, are so miniscule compared to the employee salary, I generally don't dicker when an employee needs better hardware, whatever it might be, computer, RAM, SSD, monitors, software, etc. It makes the employee happy and usually more productive, far outweighing the costs.
Even when some of your dev team is in relatively cheap places like India or Bangladesh!
<hr>
"Qulatiy is Job #1"
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I think you'll do well by adding a video card which has a DisplayPort (DP) video port. With DP you can daisy-chain 2 or more monitors with DisplayPort cables. You'll also need monitors which support DP. However, not all video cards support more than 2 monitors - you'll need to verify if they do first.
My PC has an I5 9600K cpu, and its integrated grapics support 3 monitors quite well. I'm using 3 Dell U2415's arranged in a semi-circle.
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At the onset of pandemic the company sent everyone home to work, but didn't let us take any monitors home. The LG 29" in the bedroom was commandeered as my second monitor. HDMI port from laptop. Couldn't have been easier.
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David,
I did that with the Monochrome Monitor. Wow... Norton Guides... [I Created NG for the Windows.h files]
Anyways, USB-C is good enough. It all depends on where you want the monitor.
I went from 2, to 3, and recently transitioned to a 4K, 55" TV (Equivalent of 4 monitors on one screen).
It sits on my desk, my email is in the bottom right quarter. I use this and multiple desktops.
Its so much easier/cleaner than 4 monitors, and no gaps/seams.
BUT for you, in a desktop machine. Just add another monitor card. If you end up not using it, the cost was low. If you use 1920 type resolution, and travel (I use a laptop), I have 2 External/Portable USB type monitors. Nice and thin, all fit in the computer bag, so I can setup 2 or 3 monitors in my environment.
The ONE downside to the huge monitor. It's a postage stamp on someone elses screen if I share the whole thing... LOL.
Oh, and make sure you don't have to LOOK UPWARDS all day. It can throw your "bite" off, like TMJ...
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Curious to know what portable USB type monitors you prefer.
<hr>
"Qulatiy is Job #1"
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I have an AOC and a Colzer, I prefer the latter. It comes with a Tablet type "casing" that unfolds as a stand. It also uses USB C for everything (power, and video). And it has easy adjustments for Brightness.
The AOC requires special software to adjust any of the internal things, I've never bothered.
So if you love to tinker with Contrast/Brightness, etc... Keep that in mind when looking.
For me, they are viewing devices "under duress", I am usually flying out somewhere and trying to solve some complicated problem. They are a fallback. I often get put in a conference room where I hijack the projectors, etc.
I have connected it up, to be able to constrain a presentation...
My next one will be touch screen...
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Buy a dedicated video card with its own RAM. Most integrated boards use the main RAM, which takes away from system use. You don't need to go high end, a mid-range board is sufficient for non-gaming needs.
A few years ago I purchased Skyrim and my old card (low end) couldn't handle it. I purchased a mid-range card, which fixed that problem. It also speeded up the system overall, which surprised me at the time, but it makes sense as the board provides dedicated hardware and reduces the load on the CPU.
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While not necessarily two HDMI ports, I haven't seen a computer that did NOT support two monitors for a long time. The second one might be (mini) DisplayPort, for example.
For programming, I have used a dual screen (preferable a triple screen setup, one for the source code, one for the debugging output and one for the actual application screen) for more than 30 years now, starting with that VGA+monochrome combo mentioned.
Btw, typing this on a laptop that has a 17" 4:3 monitor attached via VGA, could also use HDMI instead) as a second monitor. Don't have the space right now for a 3 screen setup...
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I'd go with the video card option. You can get one that supports multiple displays and is at least as fast as the on-board video for under $100 (GT710 or GT1030). To get dual DisplayPorts will probably cost $200 but will be much faster than the on-board video. One advantage is the video card will have its own display memory rather than using a chuck of main memory.
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I don't use dual displays, I never have.
I do, however, have a 40 inch Television with a VGA input for use as a computer screen.
It is a SEIKI, does 1920x1080 resolution. If you set the font size, etc. to 90% or so for my laptop, I have more screen real estate than I could use.
The only fly in the ointment is that my new HP laptop only has an HDMI output port. My old Dell laptop had a VGA and worked just fine, until the USB ports quit working, hence the new HP. To make a long story just a little longer, $25.00 and a new HP HDMI to VGA adapter, and I have my large display in business again.
If you have an old TV laying around with a VGA input you should consider that. Even if you don't, the big flat screens are so cheap these days, I would think you could spend lesson a setup like mine, than on a docking device. 
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The adjective for metal is metallic, but not so for iron, which is ironic.
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Nah, this is fort of the day[^]
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Pretty sure déjà vu is the proper term.
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Isn't the feeling you've heard an iron joke before 'feja vu?'
If that joke doesn't work, I'm sorry. I am feeling a bit rusty.
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Meanwhile, in the ancient past of last Friday:
The Lounge[^]
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Knew as I was posting it there was a good chance I had read it here first 😂
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The irony.
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Isn't it "Ironiferrous"? 
Yes I have a steely gaze!
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If baroque musicians don't like their presents, do they give them Bach?
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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You can't return them once you Handel them.
"the debugger doesn't tell me anything because this code compiles just fine" - random QA comment
"Facebook is where you tell lies to your friends. Twitter is where you tell the truth to strangers." - chriselst
"I don't drink any more... then again, I don't drink any less." - Mike Mullikins uncle
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If you try, you have to go into Haydn.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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