Dell P3421W 34" Black 2021

★★★★☆ 4.4 (4)

The 34-inch 3440 x 1440 IPS curved panel with 3800R curvature and 1.07 billion colors delivers a wide, immersive workspace for multitasking. Its built-in Picture-by-Picture and KVM features let you control two PCs with one keyboard and mouse, while the flicker-free screen and Comfort View reduce eye strain. Best for office workers who juggle multiple applications and need a comfortable, adjustable monitor for daily productivity.

Screen 34"
Resolution 3440 x 1440
Panel IPS
Refresh 60 Hz
Dell P3421W 34" Black 2021 monitor
39 Overall Score

No current retailer price

Snapshot

The 30-Second Version

The Dell P3421W is a 34-inch ultrawide built for productivity, not gaming. The 60Hz refresh rate is the biggest limitation, but the USB-C connectivity and KVM switch are genuinely useful for desk workers. At $699, it's worth it if you'll use those features, but gamers should look elsewhere.

Pros & Cons

Pros

  • Huge 34-inch ultrawide canvas is great for multitasking 76th
  • USB-C with power delivery keeps your desk clean 67th
  • Built-in KVM switch makes running two PCs easy
  • Fully adjustable stand with height, tilt, and swivel

Cons

  • 60Hz refresh rate feels dated in 2025
  • Only one USB-C port limits connectivity
  • Color performance is just average for the price
  • No adaptive sync for even casual gaming

The proof

Performance

The display itself is solid. The 3440 x 1440 resolution on a 34-inch panel gives you plenty of pixel density for sharp text, and the IPS panel means colors stay consistent from edge to edge. The 10-bit color support is nice for photo or video work, though the color score lands right in the middle of the pack. The 60Hz refresh rate is fine for office work but feels sluggish if you're used to anything faster. The 21st percentile performance score tells the story: this monitor is not built for speed. It's built for screen real estate.

Performance Percentiles

Color 48.3
Portability 49.9
Display 76
Feature 49.4
Ergonomic 67.1
Performance 22.4
Connectivity 27.7
Social Proof 29.2

Specifications

Full Specifications

Display

Size 34"
Resolution 3440x1440
Panel Type IPS
Aspect Ratio 21:9
Curved Yes
Curvature 3800

Performance

Refresh Rate 60 Hz

Color & HDR

Color Depth 10-bit

Connectivity

USB-C 1

Ergonomics

Height Adjustable Yes
Tilt Yes
Swivel Yes

Features

PIP/PBP Yes

vs Competition

Stacked against the LG UltraGear 45GX950A-B or the Samsung Odyssey G60SD, the P3421W looks like a different species entirely. Those are high-refresh gaming panels with OLED or QD-OLED tech, built for speed and contrast. The Dell is a productivity workhorse with a 60Hz ceiling. The ASUS ROG Strix XG27UCDMG and Gigabyte AORUS FO32U2 are also gaming-focused, with much higher refresh rates and better color performance. If you need one monitor for both work and play, those competitors win. If you need a pure office monitor with USB-C and KVM, the Dell holds its own.

Spec Dell P3421W 34" LG UltraGear 45GX950A-B ASUS ROG Strix XG27UCDMG MSI MAG 271QPX QD-OLED E2 Alienware AW-Series AW3425DW Samsung Odyssey G60SD
Screen Size 34 45 27 27 34 27
Resolution 3440 x 1440 5120 x 2160 3840 x 2160 2560 x 1440 3440 x 1440 2560 x 1440
Panel Type IPS OLED OLED QD-OLED QD-OLED OLED
Refresh Rate 60 330 240 240 240 360
Response Time Ms - 0.029999999329447746 0.029999999329447746 0.029999999329447746 0.029999999329447746 0.029999999329447746
Adaptive Sync - FreeSync Premium Pro FreeSync Premium Pro FreeSync Premium Pro FreeSync Premium Pro FreeSync Premium Pro
Hdr - DisplayHDR True Black 400 DisplayHDR True Black 400 DisplayHDR True Black 400 DisplayHDR 400 True Black HDR10+
Compare Compare Compare Compare Compare
Product ColorPortabilityDisplayFeatureErgonomicPerformanceConnectivitySocial Proof
Dell P3421W 34" 48.349.97649.467.122.427.729.2
LG UltraGear 45GX950A-B Compare 99.476.699.795.890.899.496.994.7
ASUS ROG Strix XG27UCDMG Compare 96.157.897.98490.89881.499.3
MSI MAG 271QPX QD-OLED E2 Compare 99.157.877.48490.89881.499.3
Alienware AW-Series AW3425DW Compare 997485.889.990.89895.498
Samsung Odyssey G60SD Compare 90.44077.467.890.899.587.794.7

Price

Value & Pricing

At $699, the P3421W is a tough sell in a market where 34-inch ultrawides are getting cheaper and faster. You're paying for the Dell name, the USB-C convenience, and the KVM feature. If those matter to you, it's a reasonable deal. If you just want a big screen for general use, there are cheaper options that get you 90% of the way there. The value proposition hinges entirely on whether you'll actually use the USB-C and KVM features.

Read more

Overview

The Dell P3421W is a 34-inch ultrawide built for spreadsheets, code, and anything where more horizontal space means less alt-tabbing. It's a 3440 x 1440 IPS panel with a gentle 3800R curve, 10-bit color, and a USB-C port that can handle video and power. At $699, it's aimed squarely at desk workers who want one big screen instead of two smaller ones.

It's not a gaming monitor. The 60Hz refresh rate and lack of adaptive sync make that clear. But for productivity, the P3421W does a lot right. The stand is fully adjustable, the panel is flicker-free, and the built-in KVM switch is genuinely useful if you run two computers.

Common Questions

Q: Can I use this monitor with my MacBook?

Yes, the USB-C port supports video and power delivery, so a single cable can connect your MacBook and charge it at the same time. Just make sure your MacBook supports USB-C video output.

Q: Is this monitor good for gaming?

Not really. The 60Hz refresh rate and lack of adaptive sync mean fast-paced games will feel choppy compared to a 144Hz or higher display. It's fine for casual or turn-based games, but serious gamers should look elsewhere.

Q: How does the KVM feature work?

The built-in KVM switch lets you connect two computers to the monitor and control both with one keyboard and mouse. You can switch between them using the monitor's on-screen menu, and the Picture-by-Picture mode lets you view both sources side by side.

Who Should Skip This

Gamers should skip this one entirely. The 60Hz refresh rate and missing adaptive sync make it a poor fit for anything faster than Solitaire. If you need high refresh rates, deep blacks, or HDR performance, the LG UltraGear 45GX950A-B or Samsung Odyssey G60SD are far better choices. Also skip it if you don't need USB-C or KVM, since you can find cheaper ultrawides without those features.

Verdict

The Dell P3421W is for office workers, remote employees, and anyone who lives in spreadsheets, code editors, or design tools. The ultrawide format is genuinely transformative for productivity, and the USB-C plus KVM combo makes it easy to switch between a work laptop and a personal desktop. If that's your world, this monitor will serve you well. Just don't expect it to double as a gaming display.

Usage Scores

Overall (38.5)Gaming (37.9)Office (43.7)Creative (38.9)Portable (16.7)Professional (39.8)Entertainment (41.3)
  • Overall38.5
  • Gaming37.9
  • Office43.7
  • Creative38.9
  • Portable16.7
  • Professional39.8
  • Entertainment41.3

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