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We've recently released Test Bench 2.0 for Monitors! Read our new VRR Flicker R&D Article and Pursuit Photo R&D Article to learn more.

Dell U3425WE Monitor Review

Tested using Methodology v2.0
Reviewed Sep 30, 2024 at 10:04 am
Dell U3425WE Picture
5.2
PC Gaming
3.7
Console Gaming
7.6
Office
6.9
Editing
3.2
Brightness
3.5
Response Time
2.8
HDR Picture
6.6
SDR Picture
9.1
Color Accuracy

The Dell U3425WE is a 34-inch ultrawide productivity monitor with a curved screen. It's an updated version of the Dell U3421WE, and it's part of the UltraSharp lineup, sitting alongside models that have similar features but different sizes, like the Dell U3223QE and the Dell U4025QW. It's loaded with productivity-focused perks, like a massive USB hub that includes a USB-C port that supports both Thunderbolt 4 and DisplayPort Alt Mode with 90W of power delivery. It offers other features like daisy chaining, Internal Multi-Stream Transport, and a KVM switch that each make it easy to multitask with various computers and screens. Lastly, it comes with an IPS Black panel and a 120Hz refresh rate for a smoother experience compared to 60Hz office monitors. However, even though it supports the DCI-P3 color space, it doesn't support HDR at all.

Our Verdict

5.2 PC Gaming

The Dell U3425WE is disappointing for PC gaming. It has a 120Hz refresh rate, supports all common VRR formats, and has low input lag. Unfortunately, though, fast-moving objects have blurry motion due to the monitor's slow response time. It also has limited picture quality as it doesn't support HDR at all, and blacks look gray.

Pros
  • 120Hz refresh rate with VRR support.
  • Low input lag.
Cons
  • Very blurry motion.
  • Blacks look gray.
  • No HDR support.
  • Lacks local dimming.
3.7 Console Gaming

The Dell U3425WE is bad for console gaming. Without HDMI 2.1 bandwidth, it doesn't support most signals from the PS5 or Xbox Series X|S, and the consoles don't support ultrawide signals either, so there are black bars on the sides. It also has blurry motion and limited picture quality as it doesn't support HDR at all, and blacks look gray in the dark. On the plus side, it supports VRR with consoles and has low input lag for a responsive feel.

Pros
  • Low input lag.
Cons
  • Very blurry motion.
  • Blacks look gray.
  • No HDR support.
  • Lacks local dimming.
  • Limited compatibility with consoles.
7.6 Office

The Dell U3425WE is good for office use. It gets bright enough to fight glare in most well-lit rooms and has decent reflection handling, but visibility is a problem next to sunny windows. It comes with an adjustable stand, and its wide viewing angles keep the image consistent no matter where you view it from. Its 34-inch screen is big enough to open multiple windows side by side, and it also has good text clarity. Lastly, it has a massive USB hub and supports a ton of productivity features, including Thunderbolt 4, a KVM switch, and daisy chaining to connect a second display.

Pros
  • Bright enough to fight most glare.
  • Ergonomic stand.
  • Ultrawide screen with good text clarity.
  • Massive USB hub.
  • Features like KVM and Thunderbolt daisy chaining.
Cons
  • Glare is distracting in sunny rooms.
6.9 Editing

The Dell UltraSharp U3425WE is decent for editing in SDR. It comes with an accurate sRGB mode, so colors are accurate even without calibrating it. Its reflection handling is also decent enough to use in most well-lit rooms, but not in sunny rooms. It even has a ton of productivity features, including a large USB hub and Thunderbolt daisy chaining that makes it easy to connect a second display. However, this monitor doesn't support HDR at all, which is disappointing if you want to edit HDR content. Additionally, its curved screen may take time getting used to if you've never used a curved screen to edit content.

Pros
  • Bright enough to fight most glare.
  • Ultrawide screen with good text clarity.
  • Massive USB hub.
  • Features like KVM and Thunderbolt daisy chaining.
  • Very accurate sRGB mode.
Cons
  • Blacks look gray.
  • No HDR support.
  • Glare is distracting in sunny rooms.
3.2 Brightness

The Dell U3425WE has very good brightness in SDR, so it fights glare well. However, it doesn't support HDR at all.

Pros
  • Bright enough to fight most glare.
Cons
  • No HDR support.
3.5 Response Time

The Dell U3425WE has a poor response time as fast-moving objects are blurry.

Pros
Cons
  • Very blurry motion.
2.8 HDR Picture

The Dell U3425WE doesn't support HDR.

6.6 SDR Picture

The Dell U3425WE has okay SDR picture quality. Its main strength is that it displays a wide range of colors. While it has a decent contrast ratio, blacks still look gray.

Pros
  • Displays wide range of colors.
Cons
  • Blacks look gray.
9.1 Color Accuracy

The Dell UltraSharp U3425WE has remarkable color accuracy. The dedicated sRGB mode has very accurate colors, so you won't need to calibrate it unless you need perfect white balance.

Pros
  • Very accurate sRGB mode.
Cons
  • 5.2 PC Gaming
  • 3.7 Console Gaming
  • 7.6 Office
  • 6.9 Editing

Performance Usages

  • 3.2 Brightness
  • 3.5 Response Time
  • 2.8 HDR Picture
  • 6.6 SDR Picture
  • 9.1 Color Accuracy
  1. Updated Sep 30, 2024: Review published.
  2. Updated Sep 25, 2024: Early access published.
  3. Updated Sep 18, 2024: Our testers have started testing this product.
  4. Updated Sep 13, 2024: The product has arrived in our lab, and our testers will start evaluating it soon.
  5. Updated Sep 06, 2024: We've purchased the product and are waiting for it to arrive in our lab.

Differences Between Sizes And Variants

We tested the 34-inch Dell U3425WE, which is the only size available. As part of the Dell UltraSharp lineup, it sits alongside the Dell U4025QW, the Dell U2723QE, and the Dell U3223QE, which have many of the same features but have different sizes and resolutions. Dell has other 34-inch, 3440x1440 productivity monitors, for which you can see the differences below, but the results in the review are only valid for the U3425WE.

Model Release Year Curve Panel Type Refresh Rate USB Hub Thunderbolt
U3425WE 2024 1900R IPS Black 120Hz 5x USB-A
5x USB-C
Yes
P3424WE 2023 3800R IPS 60Hz 4x USB-A
1x USB-B
1x USB-C
No
U3421WE 2020 1900R IPS 60Hz 4x USB-A
1x USB-B
2x USB-C
No

Our unit's label indicates that it was manufactured in April 2024. We tested it with firmware M3B102.

Compared To Other Monitors

The Dell U3425WE is a 34-inch, 3440x1440 ultrawide monitor meant for productivity. Its massive USB hub makes it easy to connect various devices directly to the monitor. It has other features like Thunderbolt 4, which is ideal if you have a Thunderbolt laptop, and the KVM switch and daisy chaining make it easier to multitask. While it's one of the most feature-packed work monitors you can get, it also has some limitations. Without HDR support, you can't edit content in HDR, and although it has some perks to make it versatile for gaming, like a 120Hz refresh rate and VRR support, fast-moving objects look blurry. If you're looking for a dual-purpose ultrawide for gaming and office work, there are better options available, but if you want premium office features in an ultrawide display, it's worth considering.

See our recommendations for the best work monitors, the best ultrawide monitors, and the best USB-C monitors.

Dell U2723QE

The Dell U2723QE and the Dell U3425WE are both productivity monitors in Dell's UltraSharp lineup. Besides their sizes and resolution, they're different in a few ways, particularly with features. The U3425WE has more USB ports and supports Thunderbolt 4, which is useful if your laptop also supports Thunderbolt. It also has a higher 120Hz refresh rate for a slightly smoother feel and supports VRR, which the U2723QE doesn't. However, the U2723QE delivers sharper text and unlike the U3425WE, it supports HDR. 

Dell U3223QE

The Dell U3223QE and the Dell U3425WE are both productivity monitors in Dell's UltraSharp lineup. Choosing one over the other comes down to which size and resolution you prefer, but there are a few differences in features, too. The U3425WE is more useful if your laptop has Thunderbolt support because the monitor itself supports Thunderbolt 4, which the U3223QE doesn't. The U3425WE also has a higher 120Hz refresh rate for a slightly smoother feel and supports VRR, which is beneficial for casual gaming. On the other hand, unlike the U3425WE, the U3223QE supports HDR.

Dell U4025QW

The Dell U4025QW and the Dell U3425WE are both ultrawide productivity monitors in Dell's UltraSharp lineup. They have many of the same features, including their large USB hub and Thunderbolt 4 support, but there are a few differences. The larger screen on the U4025QW gives you more screen space, and it has a higher resolution for sharper text. The U4025QW also supports HDR, which the U3425WE doesn't.

Test Results

perceptual testing image
Design
Design
Style
Curved
Yes
Curve Radius
1900R

The Dell U3425WE has a simple office-oriented design. It's mainly silver, but there are black accents throughout, including on the vents underneath the bottom bezel.

8.0
Design
Build Quality

The build quality is great. The plastic materials are well-made, but the back panel flexes when you press on it. It wobbles on the stand, which is normal for a monitor of this size, but it recovers quickly.

7.8
Design
Ergonomics
Min Height To Top Of Panel
15.2" (38.7 cm)
Height Adjustment
5.9" (15.0 cm)
Tilt Range
-21° to 5°
Rotate Portrait/Landscape
No
Swivel Range
-30° to 30°
Wall Mount
VESA 100x100

The ergonomics are good. You can adjust the monitor in a number of ways, and the stand holds the screen in position well when you adjust it. There's a cutout in the stand for cable management.

Design
Stand
Base Width
14.3" (36.2 cm)
Base Depth
9.6" (24.5 cm)
Thickness (With Display)
7.5" (19.0 cm)
Weight (With Display)
22.7 lbs (10.3 kg)

The thickness is from the side of the screen to the back of the stand, and the thickness from the center of the screen to the back is 5.7" (14.5 cm).

Design
Display
Size
34"
Housing Width
32.0" (81.3 cm)
Housing Height
14.2" (36.0 cm)
Thickness (Without Stand)
3.3" (8.5 cm)
Weight (Without Stand)
17.0 lbs (7.7 kg)
Borders Size (Bezels)
0.3" (0.9 cm)

The thickness is from the side of the screen to the back of it, and the thickness from the center of the screen to the back of the stand is 2.2" (5.5 cm).

Design
Controls

There's a power button to turn the monitor on/off and a joystick to control the on-screen display.

Design
In The Box
Power Supply
Internal

  • DisplayPort cable
  • HDMI cable
  • USB-C to USB-A cable
  • USB-C cable
  • Power cable
  • Documentation

Note: The red cable ties are not included in the box.

Picture Quality
7.1
Picture Quality
Contrast
Native Contrast
1,984 : 1
Contrast With Local Dimming
N/A

The Dell U3425WE has a decent contrast ratio. While it displays fairly deep blacks next to bright highlights and is better than most IPS panels, it lacks a local dimming feature to further improve it.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

This monitor has no local dimming feature. We still film these videos on the monitor so you can compare the backlight performance with a monitor that has local dimming.

7.9
Picture Quality
SDR Brightness
Real Scene
337 cd/m²
Peak 2% Window
323 cd/m²
Peak 10% Window
325 cd/m²
Peak 25% Window
326 cd/m²
Peak 50% Window
327 cd/m²
Peak 100% Window
328 cd/m²
Sustained 2% Window
322 cd/m²
Sustained 10% Window
325 cd/m²
Sustained 25% Window
326 cd/m²
Sustained 50% Window
327 cd/m²
Sustained 100% Window
328 cd/m²
Automatic Brightness Limiting (ABL)
0.001
Minimum Brightness
32 cd/m²

Settings

  • Preset Mode: Custom Color (after calibration)
  • Brightness: Max

The SDR brightness is very good. It gets bright enough to fight glare in most well-lit rooms, but not if you place the monitor opposite a sunny window.

0
Picture Quality
HDR Brightness
VESA DisplayHDR Certification
No Certification
Real Scene
N/A
Peak 2% Window
N/A
Peak 10% Window
N/A
Peak 25% Window
N/A
Peak 50% Window
N/A
Peak 100% Window
N/A
Sustained 2% Window
N/A
Sustained 10% Window
N/A
Sustained 25% Window
N/A
Sustained 50% Window
N/A
Sustained 100% Window
N/A
Automatic Brightness Limiting (ABL)
N/A

This monitor doesn't support HDR.

7.6
Picture Quality
Horizontal Viewing Angle
Color Washout From Left
33°
Color Washout From Right
33°
Color Shift From Left
44°
Color Shift From Right
46°
Brightness Loss From Left
39°
Brightness Loss From Right
39°
Black Level Raise From Left
70°
Black Level Raise From Right
70°
Gamma Shift From Left
49°
Gamma Shift From Right
47°

The horizontal viewing angle is good. The image remains consistent from the sides, which is useful if you want to share the screen with someone next to you.

6.6
Picture Quality
Vertical Viewing Angle
Color Washout From Below
29°
Color Washout From Above
27°
Color Shift From Below
31°
Color Shift From Above
36°
Brightness Loss From Below
32°
Brightness Loss From Above
32°
Black Level Raise From Below
61°
Black Level Raise From Above
70°
Gamma Shift From Below
30°
Gamma Shift From Above
30°

The vertical viewing angle is okay. While it's fine if you're standing up and looking down on the monitor, it washes out at really wide angles.

8.0
Picture Quality
Gray Uniformity
50% Std. Dev.
2.635%
50% DSE
0.150%

The gray uniformity is great. Although the edges are a bit darker than the screen, there isn't much noticeable dirty screen effect in the center. The results are with Uniformity Compensation off.

4.5
Picture Quality
Black Uniformity
Native Std. Dev.
2.994%
Std. Dev. w/ L.D.
N/A

The black uniformity is poor. There's visible backlight bleed, especially at the top corners, and there's clouding throughout.

9.3
Picture Quality
Color Accuracy (Pre-Calibration)
Picture Mode
Color Space (sRGB)
sRGB Gamut Area xy
100.0%
White Balance dE (Avg.)
1.81
Color Temperature (Avg.)
6,782 K
Gamma (Avg.)
2.21
Color dE (Avg.)
0.95
Contrast Setting
75
RGB Settings
Default
Gamma Setting
No Gamma Setting
Brightness Setting
75
Measured Brightness
192 cd/m²
Brightness Locked
No

The accuracy before calibration in the 'sRGB' Preset Mode is remarkable. It locks colors perfectly to the sRGB color space, and the white balance is impressive. The color temperature is also close to the 6500K target, and gamma follows the sRGB curve well, but most scenes are slightly too dark.

The sRGB mode only locks you out of the Gain, Offset, Hue, and Saturation settings. You have access to those with the 'Custom Color' mode, but colors are oversaturated in that mode.

9.7
Picture Quality
Color Accuracy (Post-Calibration)
Picture Mode
Custom Color
sRGB Gamut Area xy
99.9%
White Balance dE (Avg.)
0.58
Color Temperature (Avg.)
6,472 K
Gamma (Avg.)
2.18
Color dE (Avg.)
0.44
Contrast Setting
75
RGB Settings
Gain (100,100,95), Offset (51,49,49)
Gamma Setting
No Gamma Setting
Brightness Setting
32
Measured Brightness
100 cd/m²
ICC Profile
Download

The accuracy after calibration is incredible. There aren't any noticeable inaccuracies, and the main benefit of calibrating it is if you want access to the settings that are locked out in the sRGB mode.

9.6
Picture Quality
SDR Color Gamut
sRGB Coverage xy
99.7%
sRGB Picture Mode
Custom Color
Adobe RGB Coverage xy
89.5%
Adobe RGB Picture Mode
Custom Color

The SDR color gamut is fantastic. It has perfect coverage of the sRGB color space used in most content. It also has great coverage of the Adobe RGB color space, but it oversaturates reds and undersaturates greens, which is disappointing if you're a photo editor.

0
Picture Quality
HDR Color Gamut
Wide Color Gamut
N/A
DCI-P3 Coverage xy
N/A
DCI-P3 Picture Mode
No HDR
Rec. 2020 Coverage xy
N/A
Rec. 2020 Picture Mode
No HDR

Although it doesn't support HDR, it has a 'DCI-P3' Preset Mode, for which you can see the results.

0
Picture Quality
HDR Color Volume
1,000 cd/m² DCI-P3 Coverage ICtCp
N/A
DCI-P3 Picture Mode
No HDR
10,000 cd/m² Rec. 2020 Coverage ICtCp
N/A
Rec. 2020 Picture Mode
No HDR

This monitor doesn't support HDR.

7.5
Picture Quality
Text Clarity
Pixel Type
IPS
Subpixel Layout
RGB

The text clarity is good. Enabling Windows ClearType (top photo) improves the boldness of letters and makes them easier to read. These photos are in Windows 10, and you can also see them in Windows 11 with ClearType on and with ClearType off.

7.0
Picture Quality
Reflections
Screen Finish
Matte
Total Reflections
6.5%
Indirect Reflections
4.1%
Calculated Direct Reflections
2.4%

The reflection handling is decent. The matte screen coating diffuses a lot of the light, so while it's fine if you have a few lights around, the screen is harder to see in a really bright room, like opposite a sunny window.

9.8
Picture Quality
Gradient
Color Depth
10 Bit

The gradient handling is remarkable. There isn't any noticeable banding with shades of similar colors.

Motion
7.1
Motion
Refresh Rate
Native Refresh Rate
120 Hz
Max Refresh Rate
120 Hz
Max Refresh Rate Over DP
120 Hz
Max Refresh Rate Over HDMI
100 Hz
Max Refresh Rate Over DP @ 10-bit
120 Hz
Max Refresh Rate Over HDMI @ 10-Bit
60 Hz

Due to bandwidth limitations over HDMI, you can only reach the max refresh rate over DisplayPort or while using DisplayPort Alt Mode over USB-C as long as you have USB-C Prioritization set to 'High Resolution.'

Motion
Variable Refresh Rate (VRR)
Variable Refresh Rate
Yes
FreeSync
Compatible (Tested)
G-SYNC
Compatible (Tested)
VRR Maximum
120 Hz
VRR Minimum
< 20 Hz
VRR Supported Connectors
DisplayPort, HDMI

NVIDIAVRR MinVRR Max
DisplayPort<20Hz120Hz
HDMI<20Hz100Hz

AMDVRR MinVRR Max
DisplayPort<20Hz120Hz
HDMI<20Hz100Hz

On top of supporting FreeSync VRR and G-SYNC compatibility, this monitor also supports HDMI Forum VRR.

4.4
Motion
VRR Motion Performance
Recommended VRR OD Setting
Normal
Variable Overdrive Advertised
No
Avg. CAD
439
Best CAD
425
Worst CAD
461

Refresh RateCAD HeatmapRT ChartPursuit Photo
119HeatmapChartPhoto
100HeatmapChartPhoto
80HeatmapChartPhoto
60HeatmapChartPhoto

The Dell U3425WE has poor motion handling across its VRR range. Fast-moving objects look blurry, and there's smearing. The 'Normal' Response Time overdrive setting is consistent across the VRR range, while the 'Fast' setting has more inverse ghosting as the refresh rate drops. Both settings have such high CAD that they pass the limit of the chart, which you can see in an alternative chart.

0.9
Motion
Refresh Rate Compliance
Compliance @ Max Hz
22%
Compliance @ 120 FPS
22%
Compliance @ 60 FPS
51%

The refresh rate compliance is awful. Its response time isn't fast enough to make full color transitions before the monitor draws the next frame.

4.4
Motion
CAD @ Max Refresh Rate
OD Transition Max Refresh Rate
Recommended Overdrive Setting
Fast
Avg. CAD
363
Best 10% CAD
185
Worst 10% CAD
758

Overdrive ModeCAD HeatmapRT ChartPursuit Photo
NormalHeatmapChartPhoto
FastHeatmapChartPhoto

The CAD at the max refresh rate of 120Hz is poor. The 'Fast' overdrive setting has noticeable inverse ghosting, and the 'Normal' overdrive has more blur.

Motion
Response Time @ Max Refresh Rate
Recommended Overdrive Setting
Fast
First Response Time
11.2 ms
Total Response Time
18.0 ms
RGB Overshoot
8 RGB
Worst 10% First Response Time
31.1 ms
Worst 10% Total Response Time
31.3 ms
Worst 10% RGB Overshoot
29 RGB

Overdrive ModeFirst Response HeatmapTotal Response HeatmapRGB Overshoot Heatmap
NormalHeatmapHeatmapHeatmap
FastHeatmapHeatmapHeatmap

4.4
Motion
CAD @ 120Hz
OD Transition 120Hz
Recommended Overdrive Setting
Fast
Avg. CAD
363
Best 10% CAD
185
Worst 10% CAD
758

Overdrive ModeCAD HeatmapRT ChartPursuit Photo
NormalHeatmapChartPhoto
FastHeatmapChartPhoto

The CAD at 120Hz is poor. The 'Fast' overdrive setting has noticeable inverse ghosting, and the 'Normal' overdrive has more blur.

Motion
Response Time @ 120Hz
Recommended Overdrive Setting
Fast
First Response Time
11.2 ms
Total Response Time
18.0 ms
RGB Overshoot
8 RGB
Worst 10% First Response Time
31.1 ms
Worst 10% Total Response Time
31.3 ms
Worst 10% RGB Overshoot
29 RGB

Overdrive ModeFirst Response HeatmapTotal Response HeatmapRGB Overshoot Heatmap
NormalHeatmapHeatmapHeatmap
FastHeatmapHeatmapHeatmap

4.0
Motion
CAD @ 60Hz
OD Transition 60Hz
Recommended Overdrive Setting
Normal
Avg. CAD
415
Best 10% CAD
263
Worst 10% CAD
712

Overdrive ModeCAD HeatmapRT ChartPursuit Photo
NormalHeatmapChartPhoto
FastHeatmapChartPhoto

The CAD at 60Hz is bad as motion looks blurry. Unlike at 120Hz, the recommended overdrive is 'Normal' because 'Fast' has too much inverse ghosting.

Motion
Response Time @ 60Hz
Recommended Overdrive Setting
Normal
First Response Time
13.7 ms
Total Response Time
17.4 ms
RGB Overshoot
3 RGB
Worst 10% First Response Time
26.8 ms
Worst 10% Total Response Time
29.5 ms
Worst 10% RGB Overshoot
12 RGB

Overdrive ModeFirst Response HeatmapTotal Response HeatmapRGB Overshoot Heatmap
NormalHeatmapHeatmapHeatmap
FastHeatmapHeatmapHeatmap

Motion
Backlight Strobing (BFI)
Backlight Strobing (BFI)
No BFI
Maximum Frequency
N/A
Minimum Frequency
N/A
Longest Pulse Width Brightness
N/A
Shortest Pulse Width Brightness
N/A
Pulse Width Control
No BFI
Pulse Phase Control
No BFI
Pulse Amplitude Control
No BFI
VRR At The Same Time
No BFI

The monitor doesn't have a backlight strobing feature to reduce persistence blur.

8.2
Motion
VRR Flicker
Dark Gray Flicker
1.6 RGB
Middle Gray Flicker
0.6 RGB
Light Gray Flicker
0.7 RGB

The Dell U3425WE doesn't have any noticeable VRR flicker with changing frame rates, which is great for gaming.

10
Motion
Image Flicker
Flicker-Free
Yes
PWM Dimming Frequency
0 Hz

The backlight is complete flicker-free, which helps reduce eye strain if you're sensitive to it.

Inputs
8.8
Inputs
Input Lag
Native Resolution @ Max Hz
4.7 ms
Native Resolution @ 120Hz
4.7 ms
Native Resolution @ 60Hz
8.9 ms
Backlight Strobing (BFI)
N/A

The input lag is low for a responsive feel.

7.7
Inputs
Resolution
Native Resolution
3440 x 1440
Aspect Ratio
21:9
Megapixels
5.0 MP
Pixel Density
109 PPI
1.5
Inputs
PS5 Compatibility
4k @ 120Hz
No
4k @ 60Hz
No
1440p @ 120Hz
No
1440p @ 60Hz
Yes
1080p @ 120Hz
No
1080p @ 60Hz
Yes

This monitor has limited compatibility with the PS5, as you can only play games up to 60Hz. As the console doesn't support ultrawide signals, you'll see black bars on the sides.

3.0
Inputs
Xbox Series X|S Compatibility
4k @ 120Hz
No
4k @ 60Hz
No
1440p @ 120Hz
No
1440p @ 60Hz
Yes
1080p @ 120Hz
Yes
1080p @ 60Hz
Yes

This monitor has limited compatibility with the Xbox Series X|S. You can get a 1080p @ 120Hz signal when enabling the console's HDMI override setting, which disables VRR. As the console doesn't support ultrawide signals, you'll see black bars on the sides.

Inputs
Inputs Photos
Inputs
Video And Audio Ports
DisplayPort
1 (DP 1.4)
Mini DisplayPort
No
HDMI
1 (HDMI 2.0)
HDMI 2.1 Rated Speed
No HDMI 2.1
DVI
No
VGA
No
Daisy Chaining
Thunderbolt
3.5mm Audio Out
1
3.5mm Audio In
No
HDR10
No
3.5mm Microphone In
No

The Thunderbolt downstream port on the back supports daisy chaining to connect a second display directly to the monitor. On top of that, it has an RJ45 Ethernet port, which is useful if your laptop doesn't have one.

Inputs
USB
USB-A Ports
5
USB-A Rated Speed
10Gbps (USB 3.2 Gen 2)
USB-B Upstream Port
No
USB-C Ports
5
USB-C Upstream
Yes
USB-C Rated Speed
10Gbps (USB 3.2 Gen 2)
USB-C Power Delivery
90W
USB-C DisplayPort Alt Mode
Yes
Thunderbolt
Thunderbolt 4

The Dell U3425WE has a massive USB hub that makes it easy to connect various devices. One of the USB-C ports supports Thunderbolt 4 and DisplayPort Alt Mode with 90W of power delivery, so you can display a signal from your laptop and charge it with a single cable. The USB-C port next to it serves as an upstream port, so this is the port you need to use for the KVM switch. The other USB ports are all downstream ports to which you can connect your devices to use on your computer. The USB speed changes depending on whether you set USB-C Prioritization to 'High Data Speed' or 'High Resolution.'

Note: The Thunderbolt 4 port on our unit broke after we tried changing the Color Space setting on a MacBook. We confirmed that it works as intended, including with the KVM switch before it stopped displaying any video signal, but it still provides 90W of power.

Inputs
macOS Compatibility

ConnectionHDMI 2.0HDMI 2.1USB-C and DP
Max Refresh Rate100Hz100Hz120Hz
VRR RangeN/A48-100Hz48-120Hz
HDRNoNoNo

This monitor works well with macOS. All of the monitor's features, including the Picture-in-Picture/Picture-by-Picture mode, work well, and the text clarity is good. If you're using a MacBook and close the lid, you can continue working on the screen, including with any USB devices plugged into the monitor. Windows also return to their original positions after waking the laptop up from sleep.

Features
Features
Additional Features
Speakers
Yes
RGB Illumination
No
Multiple Input Display
PIP + PBP
KVM Switch
Yes

The Dell U3425WE has a few extra features to help with productivity. This includes a KVM switch that makes it easy to switch between sources and use the same keyboard and mouse connected to the monitor. Other features include:

  • Ambient Light Sensor: Adjusts the monitor's brightness depending on the surroundings.
  • Dell ComfortView Plus: Certified with TÜV Rheinland Eye Comfort to reduce blue light.
  • Internal Multi-Stream Support (iMST): Divides your screen into two 1720x1440 virtual monitors. This is part of the Picture-in-Picture/Picture-by-Picture mode.
  • Uniformity Compensation: Aims to improve the uniformity of the screen. We tested Gray Uniformity with it off.

Features
On-Screen Display (OSD)