DELL
DELL S3425DW 34" UW-QHD 120Hz USB-C Monitor
A 34-inch curved ultrawide monitor with UW-QHD resolution, 120Hz refresh rate, VA panel covering 99% sRGB and 95% DCI-P3, 65W USB-C power delivery, built-in 10W speakers, and ergonomic height.
- Screen Size34
Option 34" / QHD' / 120Hz / VA
- 24" / FHD' / 100Hz / IPS
- 27" / UHD' / 120Hz / IPS
- 32" / UHD' / 120Hz / VA
- 34" / QHD' / 120Hz / VA
Struck-through versions exist but are not stocked here.
- 34" 21:9 UW-QHD 3440×1440 expands multitasking space
- 120Hz refresh with 3ms GTG and AMD FreeSync Premium removes tearing
- VA panel covers 95% DCI-P3 and 99% sRGB for true-to-life colour
- USB-C 65W power delivery plus HDMI 2.1 simplifies desk cabling
- Height, tilt 5°–21° and slant 4°/4° adjust for ergonomic comfort
34-Inch Ultrawide USB-C Monitor
The DELL S3425DW is a 34-inch curved display with a 21:9 aspect ratio and UW-QHD 3440×1440 resolution. It targets professionals who need expansive multitasking space and gamers who want immersive visuals. The VA panel covers 99% sRGB and 95% DCI-P3 with 1.07 billion colors for accurate colour work. A 120Hz refresh rate and AMD FreeSync Premium support deliver smooth motion for both productivity and play.
Check USB-C Power and Video Support
Verify that your laptop or desktop USB-C port supports DisplayPort Alternate Mode and can deliver up to 65W of power for charging. The monitor provides 65W Power Delivery over USB-C alongside video and data. Confirm your graphics output can drive 3440×1440 at 120Hz over HDMI 2.1 or USB-C. Ensure your operating system supports the 21:9 aspect ratio for correct scaling.
Built-In Audio and Ergonomic Stand
Dual 5W speakers (10W total) provide sound without external speakers, saving desk space and reducing cable clutter. The stand adjusts for height, tilt from 5° to 21°, and slant of 4° left and right for comfortable viewing. Narrow 0.33-inch side bezels minimise gaps in multi-monitor arrangements. A USB-C downstream port and USB-A ports on the monitor act as a hub for peripherals.
Highlights
- 34" 21:9 UW-QHD 3440×1440 expands multitasking space
- 120Hz refresh with 3ms GTG and AMD FreeSync Premium removes tearing
- VA panel covers 95% DCI-P3 and 99% sRGB for true-to-life colour
- USB-C 65W power delivery plus HDMI 2.1 simplifies desk cabling
- Height, tilt 5°–21° and slant 4°/4° adjust for ergonomic comfort
Specifications
| Screen Size | 34 |
|---|
Other versions of this model
2 more in the same range
Same family, different memory, cooler or clock — compare before you commit.
Questions about this item
Does the Dell S3425DW include the USB-C cable needed for 65W power delivery, or must I buy one separately?
The monitor ships with a USB-C cable that supports up to 65W power delivery, so no separate cable is required for charging a compatible laptop.
Should I choose this 34" UW-QHD 120Hz model or a smaller 1080p ultrawide for coding and media?
The 3440×1440 resolution on a 34" 21:9 panel gives roughly 2.3× the pixel count of 1080p ultrawide, fitting far more code lines and showing media at native 1440p without scaling.
What does the 120Hz refresh rate actually deliver when I connect a laptop over USB-C?
Over the USB-C upstream port the monitor runs at its full 120Hz with AMD FreeSync Premium and 1ms response time, provided the laptop's GPU supports that rate at 3440×1440.
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