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SAMSUNG J791 Series 34-Inch Ultrawide QHD (3440×1440) Computer Monitor, 100Hz, Thunderbolt 3 Daisy Chain, QLED, HDMI, USB Hub, Height Adjustable…




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  • First Curved monitor with Intel Thunderbolt 3 for single-source power and charging
  • One cable to Link and dock monitor and laptop
  • Tbt3 offers 40 Gaps processing speed – – 4x faster than USB – – and up to 85W laptop charging
  • Connectivity available for docks, displays and peripherals including Macs, USB Type-C laptops, E storage drives and external Graphics cards
  • Ultra wide WQHD resolution 3440 x 1440
  • Great multi-tasking with intuitive screen split software PBP/PIP
  • Qled technology provides a wide range of colors, darker blacks with a 3000: 1 contrast ratio
  • Thunderbolt 3 technology provides compatibility with MacBook and PC
  • 100 hertz

Specification: SAMSUNG J791 Series 34-Inch Ultrawide QHD (3440×1440) Computer Monitor, 100Hz, Thunderbolt 3 Daisy Chain, QLED, HDMI, USB Hub, Height Adjustable…

Standing screen display size

‎34 Inches

Screen Resolution

‎3440 x 1440

Max Screen Resolution

‎3440×1440 Pixels



Item model number


Item Weight

‎22 pounds

Product Dimensions

‎20.3 x 31.83 x 12.2 inches

Item Dimensions LxWxH

‎20.3 x 31.83 x 12.2 inches




‎100240 Volts


‎Samsung Electronics DAV

Country of Origin


Is Discontinued By Manufacturer


Date First Available

‎April 27, 2018

11 reviews for SAMSUNG J791 Series 34-Inch Ultrawide QHD (3440×1440) Computer Monitor, 100Hz, Thunderbolt 3 Daisy Chain, QLED, HDMI, USB Hub, Height Adjustable…

3.6 out of 5
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  1. Anon

    — UPDATE: 03/03/2021 —
    Firstly, sometimes, the speakers will not work. So to fix it, you’d have to unplug ALL cables and then reconnect back to magically fix speaker issue. I used a plethora of new and old USB-C cables to confirm if it was the cables – it wasn’t.

    Aside from the monitor display, the overall construction of the casing is cheap. BOTH bottom edges’ paint start to deteriorate and chip off. Not happy, since this was not a result of any physical contact, but rather poor materials that decay overtime. A few years and it starts to decay? Fine. But I haven’t had this for that long; I can’t recall, but it must’ve only a year.

    How convenient that warranty only lasts for a year…? Of course, customer support wants me to ship it in. I can’t live without the monitor for 3 weeks for them to ship it in and back due to work. Disappointed Samsung.

    I’d go for another monitor – avoid this one, please.
    — End of update —

    I’m not sure why other reviewers are so critical and harsh about this monitor, when it’s actually really great!

    Funny story — this is my second monitor of the same model, since my bookshelf fell on top of it and left a crack; see my 2nd and 3rd pictures for reference of the sad day. Still works! However, after researching other monitors, I’ve decided to buy the same model and brand, since it has everything I personally needed:
    1. VESA mountable
    2. USB-C with 85 watts of charging (charges insanely fast) with peripheral connectivity (keyboard/mouse)
    3. 100 Hz refresh rate
    4. Great speakers
    5. High contrast ratio (3:1) compared to the average (1:1) like Acer or LG

    First, the VESA mount was a necessity for me, as I dislike the stand. The stand takes up too much valuable desk real estate. However, I’m not deducting a star for this; the deduction is for the terrible mount mechanism for the VESA mount. The product comes with a VESA mount adapter, which causes the monitor to extend/protrude forward by about 2 inches. This presents an issue if you’d like to have the monitor flush with the wall or desk, rather than sticking closer to your face.

    Next, the USB-C connectivity is amazing for MAC users. I have a 2019 MBP 16″ and it flawlessly connects and powers my laptop with all the peripherals as well. Thunderbolt/USB-C (same thing) cable is included.

    Then, the 100 Hz refresh rate makes a huge difference. I’m able to play games, watch movies, and browse with seamlessly smooth interaction. The scrolling and mouse movement experience is a night and day difference between 60 Hz and 100 Hz.

    Controversially, the speakers, in my opinion, and great and suitable for my personal needs. I’m not an audiophile, nor does my line of work require exemplary sound quality. They are just clear enough to appreciate movies and music, but the biggest reason why I love them and think they are great is because they can get LOUD. To put in perspective, I currently have it set on VOL 12/100, where 100 is the maximal loudness, and that is already sufficiently loud enough. Imagine if I wanted to have a house party with this monitor? Well, at 100%, I’d imagine it’s an air siren by that point.

    Lastly, the high contrast ratio allows me to watch movies with dark settings and play games at night without the “darks” being too lit up, if that makes sense. In other words, the blacks/dark colours on your monitor will be true shades of that darkness, rather than being too light. Hence, what contrast is. Since this monitor has a very high contrast ratio compared to other monitors, I chose this one.

    However, I wish this monitor display was IPS rather than VA. The colours are washed out slightly, but again, I personally am not affected, as my work doesn’t involve high use of colour accuracy. If you are in the creative industry, I’d suggest a 4k IPS monitor, not this Ultrawide — if you need that extra screen real estate, get TWO 4k monitors instead; make sure you have a strong PC to power those GPU-heavy monitors.

    Ultimately, I love this monitor. It looks great, it performs great, and I seriously wish that I could go back in time and take down that wall-mounted bookshelf before it inevitably fell down, because having to shell out an extra ~$1,100 CAD is not fun for anyone.

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  2. Adam

    I bought this monitor work my WFH set up, and it’s made life a lot better. I went from being in an office and having two screens to working off one due to limitations of Virtual Machines. This monitor gave me some nice real estate for my programs. Picture is great, colors are great, easy to connect through display port.

    The USB Hub –

    Thunderbolt connection works decently well. I connected it to my laptop with success on the first try. Upon reconnecting, it stopped working. I found I had to delete the screen from the Thunderbolt Manager on the laptop and reconnect. Works.

    Standard USB – C. This took some serious troubleshooting. Didn’t work out of the box. Here’s the steps I took and it now works.
    – 1 – Connected to my laptop through thunderbolt first.
    – 2 – Disconnected from laptop – Plugged into my desktops USB – C port. Suddenly started working.
    – 3 – I also disabled and re enabled the USB Hub feature of the screen through the settings. Repeated steps 1 and 2.
    – 4 – Installed the latest firmware on the monitor through USB Stick(Don’t know if this step is needed)
    – Tricks for firmware –
    – USB Stick needs to be FAT 32
    – Monitor can’t be connected through Thunderbolt or USB C to anything
    – I had to rename the downloaded .BIN file as was suggested by another website.

    In the end my monitor’s USB Hub is connected to my desktop with a USB-C(monitor) to USB-A(Desktop) cable and is working without fail.

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  3. Craig E.

    In building a music studio in my new home, I was looking for a widescreen monitor to connect my 2019 MacBook Pro, run my DAW, and have room for recording and mixing. That said, I didn’t want to spend a fortune on a new monitor. I looked at many reviews for mid-priced widescreen monitors and this one came up frequently. When it went on sale one day, I finally decided to bite the bullet and get it.

    This is one powerhouse of a monitor. The ability to power my MacBook Pro with the Thunderbolt connection is fantastic. And considering my need for many USB ports to hook up my keyboard and additional devices, the multiple ports on the back of the monitor are fantastic.

    I do find with this monitor is that the very bottom portion of the screen seems to have a bit of a muted color profile. This could be a Mac thing but the top of the monitor appears crystal clear. However, it is not so noticeable as to be annoying.

    Additionally, there was a Thunderbolt sticker attached to the bottom left corner of the monitor that looks cheesy. Thankfully I was able to pull it off with a little effort. I think Samsung should know that if someone is buying it, they don’t need decals.

    Overall, I am extremely satisfied with this monitor and feel it is going to really help my productivity.

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  4. Charles F.

    The display really is a decent display. Its build well, holds its angle even when on its included vesa adapter, and the quality of the picture really isn’t terrible. For PC users this is going to be the best display for the money, and same for Mac users. But Mac users expect a bit of a ‘better feel’ to their displays. The plastic screen is just that, side by side a retina iMac the differences is distinguishable if you look, and for a Thunderbolt Display it is lacking in some abilities even use Apple Thunderbolt branded bidirectional cables. You cannot control the brightness of this display from the Mac (like you can a true apple Thunderbolt / studio display) which would seem like functionality that should be included easily.

    Further, the USB-C does NOT seem to charge my 16″ MacBook, which I believe is related to the highest wattage port on the monitor being only 85w.

    Samsung makes the best screens on the market, they are good at what they are good at (not phones and computers, screens and appliances!) And this monitor lives up to that providing plenty of IO, respectable resolution and performance, etc.

    Where they could improve greatly and make a grab into the Mac market would be to keep this display exactly as it is, but provide display settings control through the Mac thunderbolt interface, and up the wattage of the USB-C to share the newer MacBooks with it (although this point may be mute with what we now know about USB-C charging limitations and the return of the MagSafe charger thank god)

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  5. William Bart

    Overall an impressive picture for video and games. I’m using it with a MacBook Pro, couple of issues…

    1. Color accuracy: Not really suitable for reference in design. I’ll always check mission-critical colours on my MacBook screen, which kind of defeats the point. It is nice for timeline-based editing, but impossible to calibrate to match MacBook color space.

    2. Build quality: Case required snapping bezel back into place after shipping. Rocker button is stiff on inside edge and requires a lot of effort to tap in that direction.

    3. Biggest problem: massive amounts of audio interference when powering my MacBook over USB. Even output from the headphone port on the laptop buzzes unless MacBook has a second power source attached. This basically renders it useless when editing audio or working in a DAW when transmitting power over USB.

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  6. quartzdottir

    How did a $1000 monitor have something like this slip through quality control?! I can’t mount this on my monitor arm because they didn’t finish threading the built in plate on the back of the monitor? It took over a month to arrive, and arrived faulty.

    UPDATE [still 1 star]:

    We replaced the monitor with a new one through Amazon to find that the SAME SCREW HOLE HAS NOT BEEN THREADED. It is impossible to mount this monitor to the mounting plate provided. This is a huge manufacturing default which has affected many monitors. Be cautious if you want to mount this monitor on a monitor arm.

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  7. Stephen R

    using Mac OS Big Sur: Nov 2020:
    1. When connected to Thunderbolt you cannot control volume of the speakers built into screen.
    2. You cannot use the PIP/PBP with two Thunderbolt/USBC connections
    3. PIP/PBP is only visual, there is NO kvm… This is a HUGE miss on this product.
    4. you need to adjust screen settings to essentially disable everything except for “Dynamic Contrast” or else text looks blurry: Even Game Mode makes text look blurry.

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  8. William da Silva

    This screen was for office use, not gaming or graphics. Quality is not even acceptable for office use.

    The image quality is quite bad. Image is faded and extremely pixilated. You can see the grid between pixels from 18 inches away (same result on 2 units).

    The form factor of the product is also not the best design. It is way too deep, sits too close or does not fit on many desks.

    NOTE: we have a few other 34 inch curved ultra wides in the office from another make. Love the size and quality of those.

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  9. Paul

    I purchased this monitor as it allows me to view many more channels in my DAW than a smaller monitor would. The color is sharp, and it’s outstanding for watching movies or playing games as well. I don’t think I could ever go back to a smaller monitor; it’s just that good!

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  10. Israel Herrera E.

    Excelente complemento para una Mac Mini… tenia miedo del envio a Ecuador, pero llego muy bien… No hay mucho que hablar de Samsung sobre su calidad de imagen y calidad… Excelente producto

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  11. William Marshall-Inman

    I use this for school, work, and everything else. With the multiple powered thunderbolt ports this is a great option for max users that are looking for a solid display. Has a nice designed stand, but can also be mounted.

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    SAMSUNG J791 Series 34-Inch Ultrawide QHD (3440×1440) Computer Monitor, 100Hz, Thunderbolt 3 Daisy Chain, QLED, HDMI, USB Hub, Height Adjustable…
    SAMSUNG J791 Series 34-Inch Ultrawide QHD (3440×1440) Computer Monitor, 100Hz, Thunderbolt 3 Daisy Chain, QLED, HDMI, USB Hub, Height Adjustable…


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