Dell S2721QS 27" 4K UHD IPS Monitor vs Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor
The Dell S2721QS 27" 4K UHD IPS Monitor is the mid-range option here, but the Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor takes the cake with its stunning 165Hz refresh rate compared to Dell's 60Hz. In real-world use, this means smoother gaming experiences and faster response times, especially in fast-paced titles. While the Dell offers a sharp 4K resolution at 3840 x 2160, the Alienware's 3440 x 1440 UWQHD resolution still delivers vibrant visuals with 149% sRGB coverage. So, if you're into gaming or media consumption, the Alienware monitor's performance and color depth are hard to beat, making it a worthwhile upgrade in 2026. Key specs: Display: 27" vs 34.18" and Refresh: 60 Hz vs 165 Hz.
Why compare these? The Dell S2721QS 27" 4K UHD IPS Monitor (mid-range) and Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor (premium flagship) represent different approaches to monitors. While they may appeal to different budgets, many buyers consider both options. This 2026 comparison helps you decide if the differences justify the price gap.
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Key Differences at a Glance
| Aspect | Dell S2721QS | Alienware AW3423DWF |
|---|---|---|
| User Rating | 4.4★ (1,905 reviews) | ✓4.8★ (1,501 reviews) |
| Top Strength | Razor-sharp 4K resolution (163 PPI) delivers excellent text clarity | QD-OLED panel delivers infinite contrast and perfect blacks with no blooming |
| Main Drawback | Limited to 60Hz, making it less suitable for fast-paced gaming | HDMI port is version 2.0, limiting native resolution output to 100Hz (console support varies) |
| Market Position | Mid-range | ✓Flagship |
Dell S2721QS 27" 4K UHD IPS Monitor
27" Viewable (27" Class)
3840 x 2160 (4K UHD)
16:9
IPS (In-Plane Switching)
Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor
34.18" Viewable (34" Class)
3440 x 1440 (UWQHD)
21:9
QD-OLED (Quantum Dot OLED)
Only the specs that differ are shown here. Winners are highlighted when the data is clear.
+Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
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Full specs, pros, and cons
Everything side-by-side with ratings and the full spec list.
Comparison: Dell S2721QS 27" 4K UHD IPS Monitor vs Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor
Dell S2721QS 27" 4K UHD IPS Monitor
Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor
| Criterion | Dell S2721QS 27" 4K UHD IPS Monitor | Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor |
|---|---|---|
| Rating | ★4.4(1,905)Amazon | ★4.8(1,501)Best Buy |
Screen Size | 27" Viewable (27" Class) | 34.18" Viewable (34" Class) |
Resolution | 3840 x 2160 (4K UHD) | 3440 x 1440 (UWQHD) |
Aspect Ratio | 16:9 | 21:9 |
Screen Type | IPS (In-Plane Switching) | QD-OLED (Quantum Dot OLED) |
Refresh Rate | 60 Hz | 165 Hz (via DisplayPort) / 100 Hz (via HDMI 2.0) |
Response Time | 4 ms (Gray-to-Gray Extreme Mode) | 0.1 ms (GtG) |
Brightness | 350 nits (Typical) | 250 nits (Typical SDR) / 1,000 nits (Peak HDR) |
Contrast | 1,300:1 (Typical) | 1,000,000:1 (Infinite) |
Color Gamut | 99% sRGB | 99.3% DCI-P3 / 149% sRGB |
Color Depth | 1.07 Billion (10-bit via 8-bit + FRC) | 1.07 Billion (10-bit) |
HDR | HDR Playback Support (Not VESA Certified) | VESA DisplayHDR True Black 400 (Peak 1000 Mode available) |
Adaptive Sync | AMD FreeSync (40Hz - 60Hz) | AMD FreeSync Premium Pro (VRR 48-165Hz) |
Viewing Angles | 178° (H) / 178° (V) | 178° (H) / 178° (V) |
Curvature | Flat | 1800R |
Speakers | 2x 3 W (Stereo) | No (None) |
Ports | 2x HDMI 2.0; 1x DisplayPort 1.2; 1x 3.5mm Audio Line-out | 2x DisplayPort 1.4; 1x HDMI 2.0; 1x USB-B Upstream; 4x USB-A Downstream (5 Gbps); 1x Audio Line-out; 1x Headphone Out |
USB C | No | No |
Kvm | No | No |
Vesa | 100 x 100 mm | 100 x 100 mm |
Ergonomics | Height (110mm), Tilt (-5° to 21°), Swivel (-30° to 30°), Pivot (90°) | Height (110mm), Swivel (-20° to 20°), Tilt (-5° to 21°), Slant (-5° to 5°) |
Power Consumption | 28 W (Typical) / 52 W (Max) / 0.3 W (Standby) | 34 W (Typical) / 200 W (Max) / 0.5 W (Standby) |
Weight With Stand | 6,400 g (14.11 lbs) | 9,650 g (21.27 lbs) |
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Dell S2721QS 27" 4K UHD IPS Monitor
27" Viewable (27" Class)
3840 x 2160 (4K UHD)
16:9
IPS (In-Plane Switching)
60 Hz
4 ms (Gray-to-Gray Extreme Mode)
Pros
- Razor-sharp 4K resolution (163 PPI) delivers excellent text clarity
- Fully adjustable ergonomic stand (Height, Pivot, Swivel, Tilt) included
Cons
- Limited to 60Hz, making it less suitable for fast-paced gaming
- Lacks USB-C connectivity and USB data hub
Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor
34.18" Viewable (34" Class)
3440 x 1440 (UWQHD)
21:9
QD-OLED (Quantum Dot OLED)
165 Hz (via DisplayPort) / 100 Hz (via HDMI 2.0)
0.1 ms (GtG)
Pros
- QD-OLED panel delivers infinite contrast and perfect blacks with no blooming
- Instantaneous 0.1ms response time ensures zero motion blur in fast-paced games
Cons
- HDMI port is version 2.0, limiting native resolution output to 100Hz (console support varies)
- Non-standard triangular subpixel layout can cause text fringing (purple/green edges) on text
Which one is better?
The Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor is the better buy for most people - its 165Hz refresh rate crushes the Dell's 60Hz. That said, grab the Dell if you need a budget-friendly option with a great 4K resolution - it's typically lighter at 225.75 oz.
Who should buy each?
Choose the Dell S2721QS 27" 4K UHD IPS Monitor if: you want sharp 4K resolution for productivity, need a lighter monitor for portability, or are on a budget.
Choose the Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor if: you play fast-paced games, enjoy immersive gaming with a curved screen, or want the best color accuracy for creative work. (34.18" display, 165 Hz refresh)
Quality Seekers
Higher user rating (4.8★ vs 4.4★) indicates better overall satisfaction
→ Choose Alienware AW3423DWF
Premium Buyers
Higher-tier option with more premium features and build quality
→ Choose Alienware AW3423DWF
Value Seekers
Better value proposition for buyers who don't need top-tier features
→ Choose Dell S2721QS
Razor-sharp 4K resolution Priority
Razor-sharp 4K resolution (163 PPI) delivers excellent text clarity
→ Choose Dell S2721QS
Conclusion
There is no wrong answer here. Focus on the features you will use daily and pick the model that aligns with them.
Bottom line: The Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor leads with a 4.8★ rating versus 4.4★. That said, Dell S2721QS 27" 4K UHD IPS Monitor could still be the right pick depending on your specific priorities.
Frequently Asked Questions
+Which is better: Dell S2721QS 27" 4K UHD IPS Monitor or Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor?
Dell S2721QS 27" 4K UHD IPS Monitor is the better choice if you prioritize razor-sharp 4k resolution (163 ppi) delivers excellent text clarity. Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor wins if you value qd-oled panel delivers infinite contrast and perfect blacks with no blooming. Both are rated highly (4.4★ vs 4.8★), so consider your specific needs and budget.
+What are the main differences between Dell S2721QS 27" 4K UHD IPS Monitor and Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor?
Key differences: Dell S2721QS 27" 4K UHD IPS Monitor offers razor-sharp 4k resolution (163 ppi) delivers excellent text clarity, while Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor stands out with qd-oled panel delivers infinite contrast and perfect blacks with no blooming. Consider that Dell S2721QS 27" 4K UHD IPS Monitor limited to 60hz, making it less suitable for fast-paced gaming. Meanwhile, Alienware AW3423DWF 34" QD-OLED Curved Gaming Monitor hdmi port is version 2.0, limiting native resolution output to 100hz (console support varies). Check the detailed specs table above for a complete comparison.
+Where can US buyers get the best price?
For US buyers, Amazon typically offers competitive pricing with Prime shipping, easy returns, and reliable warranty support. We recommend comparing prices on both products using our affiliate links above—prices fluctuate regularly, and you may find sales or deals.
+Is this comparison up to date?
Yes, this comparison is current for 2026. We regularly verify specs, ratings, and availability. Last verified: January 26, 2026. PageBen uses affiliate links for monetization, but our recommendations are research-driven and independent.
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