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Dell 34 Curved USB-C Monitor – P3421W

Productivity that pulls you in

Focus like never before on this immersive, curved monitor with a WQHD screen, improved cable management and up to 65W of power delivery.


Diagonal Viewing Size
867.2 mm (34.14 in.)

Preset Display Area (H x V)
799.8 mm x 334.8 mm (31.49 in. x 13.18 in.)
267773.04 mm (415.05 in.)

Panel Type
In-Plane switching Technology

3800R (typical)

Display Screen Coating
Antiglare with 3H hardness

Maximum Preset Resolution
3440 x 1440 at 60Hz

Border Width (Edge of Monitor active area)
7.5 mm (Top)
7.6 mm (Left/Right)
17.9 mm (Bottom)

Viewing Angle
178° (vertical) typical
178° (horizontal) typical

Pixel Pitch
0.2325 mm x 0.2325 mm

Pixel Per Inch (PPI)

Contrast Ratio
1000: 1 (typical)

Aspect Ratio

Backlight Technology
White LED edgelight system

300 cd/m² (typical)

Response Time
8 ms (normal); 5 ms (Fast) - (gray to gray)

Power Delivery
Up to 65W

Wireless Charging Feature

G-SYNC Suupport

Height-adjustable stand (150mm)
Tilt (-5° to 21°)
Swivel (-30° to 30°)

PbP / PiP / KVM
PbP (Yes)
PiP (Yes)
KVM (Yes)

Daisy Chain Availability

Dell Display Manager Compatibility

Remote Asset Management
Yes, via Dell Command | Monitor

Specifications - Service / Support Details
3-Year Advanced Exchange Service and Premium Panel Guarantee

Color Support
Color Gamut (typical): 99% sRGB
Color Depth: 1.07 billion colors

Flat Panel Mount Interface
VESA (100 mm)

Audio Output


1 DisplayPort version 1.2
1 HDMI port version 2.0
1 USB Type-C upstream port (Alternate mode with DisplayPort 1.2, Power Delivery up to 65 W)
1 SuperSpeed USB 5Gbps (USB 3.2 Gen1) upstream port


Security lock slot (cable lock sold separately)

Dimensions & Weight

Height with stand (Compressed ~ Extended)
391.1 mm ~ 541.1 mm 15.40 in. ~21.30 in.

815.7 mm (32.11 in.)

237.4 mm (9.35 in.)

Height without stand
365.4 mm (14.39 in.)

Width without stand
815.7 mm (32.11 in.)

Depth without stand
58.1 mm (2.29 in.)

Weight (panel only - for VESA mount)
6.7 kg (14.85 lb)

Weight (with packaging)
14.9 kg (32.80 lb)

Built-in Devices
2 USB 2.0 downstream port - Back
2 SuperSpeed USB 5Gbps (USB 3.2 Gen1) - Bottom


Temperature Range
Operating: 0° to 40°C (32° to 104°F)
Non-operating: -20° to 60° (-4° to 140° F)

Humidity Range
Operating: 10% to 90% (non-condensing)
Non-Operating: 10% to 90% (non-condensing)

Operating: 5,000 m (16,404 ft) max
Non-Operating: 12,192 m (40,000 ft) max

Voltage Required
100 to 240 VAC / 50 or 60 Hz ± 3Hz / 1.5 A (typical)

Power Consumption (Operational)
32.75W (typical) / 126W (maximum)

Power Consumption Stand by / Sleep
Less than 0.3W


What's Included
Monitor with stand
Power cable
1 DP Cable (DP to DP)
1 HDMI cable
1 USB Type-C cable (C to C)
1 SuperSpeed USB 5Gbps (USB 3.2 Gen1) upstream cable
Cable Tie
Quick Setup Guide
Safety and Regulatory Information

Compliant Standards
ENERGY STAR certified monitor
EPEAT registered where applicable. EPEAT registration varies by country. See for registration status by country.
TCO Certified
PVC/BFR/CFR free monitor (excluding external cables)

Product Safety, EMC and Environmental Datasheets
Dell Regulatory Compliance Home Page
Dell and the Environment

Your most productive view

Immersive productivity: See more and achieve more at home or in the office on this 34-inch ultrawide WQHD (3440 x 1440) curved screen. With more onscreen space, you can multitask effectively—without the need for a dual monitor setup. Plus, the three-sided, ultra-thin borders let you dive in without distraction.

All-encompassing view: The 3800R screen curvature creates an ultrawide 21:9 field of view, minimizes reflection and offers near uniform visual focus, for a more comfortable visual experience over extended viewing periods.

Unparalleled focus: Focus more on your work at home or in the office with a panoramic view, extended peripheral vision and incredible depth.

Consistent views: Expect seamless, wide viewing angles no matter where you sit, thanks to IPS technology.

Product Brochure: Download the PDF file for the Dell 34 Curved USB-C Monitor - P3421W
Stylish redesign. Elevated comfort.

Stylish redesign. Elevated comfort.

Designed with you in mind: Navigate the menu and adjust screen settings with the easy-to-use joystick control. We’ve also given you the option to effortlessly snap on the magnetic Dell Slim Soundbar - SB521A*. It’s time to elevate your listening experience.

Beauty meets function: This sleek monitor features a small base and an improved cable management design that hides cables in the monitor riser, for a clutter free desk space at your office or home office.

Comfort is key: Tilt, swivel and adjust the height of your monitor to a maximum of 150mm because you should be comfortable however and wherever you work.

Easy on the eyes: Optimize eye comfort with a flicker-free screen and ComfortView*, a feature that reduces harmful blue light emissions.

Convenient connectivity

The power of USB-C®: Get up to 65W of power delivery via USB-C, so you can keep your laptop battery full and enjoy uninterrupted productivity. This single-cable solution also saves up to 72% of workspace setup time*, reduces cable clutter and transmits power, data and audio—all at once.

Multitask efficiently: Connect two PCs to the monitor and display the content at the same time with Picture-by-Picture (PbP) and Picture-in-Picture (PiP) features. Use the KVM (keyboard, video and mouse) feature to edit content from two different PCs using a single keyboard and mouse.

Quick convenience: Plug in whatever you need and keep it in reach with the two, SuperSpeed USB 5Gbps (USB 3.2 Gen1) quick access ports.
Improved Dell Display Manager

Improved Dell Display Manager

Productivity at every level: Easy Arrange allows you to easily tile multiple applications across one or more screens with 38 pre-set window partitions and the ability to personalize up to five windows, giving you improved multitasking abilities.

Seamless transitions: The auto-restore feature remembers where you left off, so applications will go back to where you left them, even after you’ve unplugged.

More ways to manage: Asset management reports allow IT managers to quickly capture and track monitor information as well as configure multiple monitors at once through a single setup.

The key to convenience: Shortcut keys can save you even more time, letting you easily configure your display management settings so you can get to work faster.

Download Dell Display Manager*
Green thinking: for today and tomorrow

Green thinking: For today and tomorrow

Environmental standards: This monitor meets the latest regulatory and environmental standards such as EnergyStar®, EPEAT®*, China Energy Label CEL and CECP.

Eco-conscious packaging: To reduce our manufacturing impact on the environment, this monitor is shipped Styrofoam-free and the packaging is made of at least 75% recycled cardboard.

Energy conservation: Save energy when your monitor is not in use with PowerNap*, a feature that dims or puts your monitor to sleep when it’s not in use.

Advancing sustainability: Dell Technologies is committed to reducing environmental impact throughout the product lifecycle. Read more about our commitment to sustainability and our 2030 Social Impact goals here, and our product’s carbon footprint here.
Connectivity Options

Connectivity Options

Ports & Slots:
1. Power connector | 2. HDMI port | 3. DisplayPort | 4. USB-C port | 5. SuperSpeed USB 5 Gbps (USB 3.2 Gen1) upstream port | 6. USB 2.0 downstream port (2) | 7. SuperSpeed USB 5 Gbps (USB 3.2 Gen1) downstream port (2) | 8. Stand lock feature

Cables Included:
1. Power cable | 2. DisplayPort cable | 3. HDMI cable | 4. USB-C cable (USB 3.2 Gen1 (5 Gbps)) | 5. USB 3.2 Gen1 (5Gbps) upstream cable

Peace of mind, guaranteed

Our products are engineered with care and precision, so we guarantee support and peace of mind.
A brand you can rely on
A brand you can rely on
As the No. 1 monitor company worldwide for seven consecutive years (2013 to 2020)*, we take pride in our unyielding commitment to quality and the utmost satisfaction of our customers.
Premium Panel Exchange
Premium Panel Exchange
The Dell Premium Panel Exchange allows a free panel replacement during the Limited Hardware Warranty* period even if only one bright pixel is found.
Advanced Exchange Service
Advanced Exchange Service
Your monitor comes with a 3-year Advanced Exchange Service* so that if a replacement becomes necessary, it will be shipped to you the next business day during your 3-year Limited Hardware Warranty*.


Complete your experience with accessories designed to make the most of your Dell Monitor.
Dell Single Monitor Arm | MSA20
Dell Single Monitor Arm | MSA20
Enjoy a virtually tool-free assembly and easy installation with the Single Monitor Arm. Dell Quick Release lets you snap on this P-series monitor onto the arm simply without tools*.
Dell Slim Soundbar | SB521A
Dell Slim Soundbar | SB521A
World’s slimmest and lightest soundbar* offers exceptional audio clarity and magnetically attaches to Dell monitors*, offering a clean desk experience
Dell Multi-Device Wireless Keyboard and Mouse Combo | KM7120W
Dell Multi-Device Wireless Keyboard and Mouse Combo | KM7120W
Work seamlessly across three PCs on this compact keyboard and mouse combo that keeps your desk clutter-free and lets you stay productive with up to 36 months of battery life.*
Drivers, Manuals & Support

Dell Support

From drivers and manuals to diagnostic tools and replacement parts, Dell Product Support has you covered!

Intel® Core™ Processors


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