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Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

 & Tony Hoffman Senior Writer, Hardware

Our team tests, rates, and reviews more than 1,500 products each year to help you make better buying decisions and get more from technology.

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Dell UltraSharp 43 4K USB-C Monitor (U4320Q) - Dell UltraSharp 43 4K USB-C Monitor (U4320Q)
4.0 Excellent

The Bottom Line

Dell's big, bold UltraSharp 43 4K USB-C Monitor (U4320Q) packs a large 4K panel in standard widescreen format, letting you tile windows both vertically and horizontally—even from more than one computer.
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Pros & Cons

    • Large IPS screen in UHD (4K) resolution
    • Supports tiled windows (even from multiple video sources) via Dell software
    • Better-than-expected sRGB color coverage
    • Generous port selection
    • USB Type-C port with 90-watt power delivery
    • Stand offers only modest adjustability
    • OSD controls are small buttons on monitor's bottom edge

Dell UltraSharp 43 4K USB-C Monitor (U4320Q) Specs

Adaptive Sync NA
Aspect Ratio 16:9
Dimensions (HWD) 25.8 by 38.1 by 9.8 inches
Height-Adjustable Stand?
Landscape/Portrait Pivot
Native Resolution 3840 by 2160
Panel Size (Corner-to-Corner) 42.5
Pixel Refresh Rate 60
Rated Contrast Ratio 1000:1
Rated Screen Luminance 350
Screen Technology IPS
Swiveling Stand?
Tilting Stand?
USB Ports (Excluding Upstream) 4
VESA DisplayHDR Level NA
Video Inputs DisplayPort
Video Inputs HDMI (2)
Video Inputs USB-C
Warranty (Parts/Labor) 3
Weight 38.8

The Dell UltraSharp 43 4K USB-C Monitor (U4320Q) is a $969.99 productivity monitor that takes a more classic form than some of its compatriots. While many large-screen monitors (that is, ones bigger than 40 inches) for business or gaming have ultra-wide or super-wide curved panels, the U4320Q's screen is flat, in an ordinary 16:9 widescreen aspect ratio. This allows you to display more of a document vertically, or more spreadsheet rows, than screens with a wider format. Its form may be traditional, but nothing is stodgy about its wealth of ports, including a USB-C connection that can charge a laptop, and its support for displaying multiple video sources in discrete windows onscreen at the same time. It's a fine large-screen pick for business power users.


The Design: A 'Flat'-Out Big Panel

The U4320Q's 42.5-inch screen (measured diagonally) employs in-plane switching (IPS) technology and has a UHD (aka 4K) native resolution of 3,840 by 2,160 pixels. Its pixel density of 103 pixels per inch (ppi) is fine for typical office use. And while that kind of measure is okay for casual photo or video editing, you will want to get a display with a higher pixel density for editing detailed graphics or photos.

Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

You will need a wide desk or table to hold the U4320Q. Including its stand, it measures 25.8 by 38.1 by 9.8 inches (HWD) and weighs 38.8 pounds. The stand has some modest ergonomic features: You can raise the screen up to 2.4 inches, swivel 40 degrees in either direction, and tilt 5 degrees toward you or 10 degrees away. If you prefer to wall-mount the Dell U4320Q, holes in back can take a VESA bracket (not included).

Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

Like many of today's midrange and upper-echelon business monitors, the U4320Q has no lack of ports. We'll start with USB: It has one upstream USB-C port, which allows for data and video transfer in DisplayPort over USB-C alternate mode and can provide up to 90 watts of USB power delivery, letting you power and/or charge a laptop that's connected to it. There's also a downstream USB Type-C port and USB Type-A ports for connecting a mouse, a keyboard, an external hard drive, or other peripherals.

The lack of a pivot mount in the stand makes most of the ports—downward-facing in back—hard to reach, though one USB-C and one USB-A port are located on the monitor's side for easy access. You would be advised to attach HDMI or DisplayPort cables before you move the U4320Q into location; it will be a lot harder to plug them in when the monitor is upright and in place.

Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

Rounding out the connectivity picture are HDMI 2.0 and DisplayPort 1.4 inputs (two of each), and a 3.5mm headphone jack. About the only port commonly found on what have come to be known as docking-station or USB-hub monitors is an RJ-45 Ethernet jack. Unless your connected laptop itself has an Ethernet jack, you'll have to make do with its Wi-Fi for connectivity. This monitor won't help you there, though some other models will.

Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

With Dell Display Manager software (a free download), you can tile and view programs in both preset and custom layouts, so you can multitask to your heart's content. The software supports input from up to four different PCs on the different display inputs, so you could, say, monitor a render task on another PC while working on one or more other computers without screen-switching. Alternately, you could mirror your laptop's screen in a window on the U4320Q while working on your desktop PC. The extra vertical space compared with an ultra-wide monitor makes it easy to arrange windows both horizontally and vertically.

You navigate the U4320Q's onscreen display (OSD) menu system via a row of four small function buttons on the bottom of the monitor near the right-hand edge. Alas, they're not as convenient as the mini-joystick controllers of the Dell UltraSharp 27 4K USB-C Hub Monitor (U2723QE) and many other recent business monitors.


Testing the Dell U4320Q: Full sRGB Color Coverage, Healthy Contrast

I tested the U4320Q's brightness, contrast ratio, and color accuracy using our standard test gear: a Klein K-10A colorimeter, a Murideo SIX-G pattern generator, and Portrait Displays' CalMAN 5 calibration software.

Dell rates the monitor's luminance at 350 nits (candelas per square meter), and it fell a bit short of that—297 nits—in my testing. That's still bright enough for most any business use—including photo and video editing—as well as gaming, provided that you're not using the U4320Q in a room that's flooded with ambient light. The display also did better than its rated 1,000:1 contrast ratio, with a measured score of 1,187:1. (See how we test monitors.)

Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

According to Dell, the U4320Q covers 96% of the sRGB color space. In my tests using the default standard mode, it outdid that, essentially covering the full space (see the image above). The panel also covered 82.7% of DCI-P3, a color space geared to digital video, as well as 82% of the wider Adobe RGB gamut popular for preparing photos for printing. These numbers are fine for what the panel is, but it cements it as more of a productivity model than a color-expert one for creative pros.

In the subjective, ad-hoc portion of our testing, we view a select group of test-standard photos and video clips. Stills looked sharp, with accurate colors and good detail in both light and dark areas. Videos also looked great, with vivid colors and good retention of detail in a variety of scenes.


The Verdict: A Classic Productivity Panel in XXL Size

The U4320Q is the largest-screen productivity monitor that we have reviewed in several years. Before the pandemic, we had reviewed several high-quality 49-inch business monitors, the Dell UltraSharp 49 Curved Monitor (U4919DW), the LG 49WL95C-W, and the Philips Brilliance 499P9H—the latter two are PCMag Editors' Choice picks, and all three are ultra-wide, curved panels. They are good for viewing documents like many-column spreadsheets at a glance, or for parking palettes of tools off to the side of your main working window.

The Dell UltraSharp 43 4K USB-C Monitor (U4320Q), though, offers a traditional, wide-screen alternative, just in XXL size. Whether you go for it, or one of the ultra-wide models, is largely a matter of business need and personal preference. But if you have the desk and the workload to justify the big view, the U4320Q gives you a TV-size IPS panel with full sRGB color coverage and an abundance of ports.

Final Thoughts

Dell UltraSharp 43 4K USB-C Monitor (U4320Q) - Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

Dell UltraSharp 43 4K USB-C Monitor (U4320Q)

4.0 Excellent

Dell's big, bold UltraSharp 43 4K USB-C Monitor (U4320Q) packs a large 4K panel in standard widescreen format, letting you tile windows both vertically and horizontally—even from more than one computer.

Get It Now
Best DealVisit Dell UK

Buy It Now

Visit Dell UK

About Our Expert

Tony Hoffman

Tony Hoffman

Senior Writer, Hardware

Since 2004, I have worked on PCMag’s hardware team, covering at various times printers, scanners, projectors, storage, and monitors. I currently focus my efforts on 3D printers, pro and productivity displays, and drives and SSDs of all sorts.

Over the years, I have reviewed smart telescopes, iPad and iPhone science apps, plus the occasional camera, laptop, keyboard, and mouse. I've also written a host of articles about astronomy, space science, travel photography, and astrophotography for PCMag and its past and present sibling publications (among them, Mashable and ExtremeTech), as well as for the former PCMag Digital Edition.

The Technology I Use

I have a Lenovo ThinkPad T14 laptop that's my work daily driver, an HP Pavilion Aero 13 as my primary personal laptop, and an Asus ProArt P16 for detailed photo work. (I also have an older Dell XPS 13, which now stays at home full-time.) For storage testing, I rely on our three custom-built Windows testbeds in PC Labs, as well as a 2024 MacBook Pro.

My primary home monitor is a BenQ EX2780Q, a gaming monitor with a great sound system and excellent image quality. I use that panel for writing, watching videos, and working with photos. I also have an HP 27 Curved Display—one of the first general-purpose curved monitors—which I have paired with an Acer Aspire desktop computer. My multifunction printer is an Epson Expression Premium XP-7100 Small-in-One. I also own an Epson Perfection V39 flatbed scanner, which I use for photos and short documents, and a Canon Selphy CP1300 small-format photo printer for turning out snapshots.

My first cell phone, in 2006, was a Motorola Razr; since then, it’s been all iPhones—I currently have an iPhone 15 Pro. I use my iPhone a lot for casual photography, though I also use a Sony DSC-RX100 VII and a Canon G5 X Mark II for everyday shooting. For much of my travel photography and astrophotography, I use either a Sony A7r II or A7 III, paired with a variety of lenses ranging from a Sony 14mm f/1.8 prime to a Sony FE 70-300mm f/4.5-5.6 G OSS zoom lens. I also pair the A7r with a RedCat 51 for deep-sky star shooting. For astrophotography, I also use the Seestar S30 and S50 and the Unistellar Odyssey smart telescopes, which are essentially astronomical cameras controlled through one’s mobile device.

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