KOORUI 24E3 165Hz Gaming Monitor vs Dell S2721QS 27" 4K UHD IPS Monitor
In the showdown between the KOORUI 24E3 165Hz Gaming Monitor and the Dell S2721QS 27" 4K UHD IPS Monitor, the KOORUI takes the edge for gaming thanks to its stunning 165Hz refresh rate compared to Dell's 60Hz. If you're serious about fast-paced games, this high refresh rate makes a massive difference in responsiveness and smoothness. On the flip side, Dell wins with its razor-sharp 4K resolution at 3840x2160, providing notable clarity for media consumption and productivity tasks. The 27-inch screen size is also more immersive, making it ideal for photography and video editing where detail matters. Key specs: Display: 23.8" vs 27" and Refresh: 165 Hz vs 60 Hz.
Why compare these? The KOORUI 24E3 165Hz Gaming Monitor (budget-friendly) and Dell S2721QS 27" 4K UHD IPS Monitor (mid-range) 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 | KOORUI 24E3 | Dell S2721QS |
|---|---|---|
| User Rating | 4.3★ (3,500 reviews) | ✓4.4★ (1,905 reviews) |
| Top Strength | True Fast IPS panel delivers 1ms response times with vibrant 99% sRGB colors | Razor-sharp 4K resolution (163 PPI) delivers excellent text clarity |
| Main Drawback | Stand ergonomics are poor (Tilt only; no height adjustment) | Limited to 60Hz, making it less suitable for fast-paced gaming |
| Market Position | Budget | ✓Mid-range |
KOORUI 24E3 165Hz Gaming Monitor
23.8" Viewable (24" Class)
1920 x 1080 (FHD)
16:9
IPS (Fast IPS)
Dell S2721QS 27" 4K UHD IPS Monitor
27" Viewable (27" Class)
3840 x 2160 (4K UHD)
16:9
IPS (In-Plane Switching)
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: KOORUI 24E3 165Hz Gaming Monitor vs Dell S2721QS 27" 4K UHD IPS Monitor
KOORUI 24E3 165Hz Gaming Monitor
Dell S2721QS 27" 4K UHD IPS Monitor
| Criterion | KOORUI 24E3 165Hz Gaming Monitor | Dell S2721QS 27" 4K UHD IPS Monitor |
|---|---|---|
| Rating | ★4.3(3,500)Amazon | ★4.4(1,905)Amazon |
Screen Size | 23.8" Viewable (24" Class) | 27" Viewable (27" Class) |
Resolution | 1920 x 1080 (FHD) | 3840 x 2160 (4K UHD) |
Aspect Ratio | 16:9 | 16:9 |
Screen Type | IPS (Fast IPS) | IPS (In-Plane Switching) |
Refresh Rate | 165 Hz (via DisplayPort) / 144 Hz (via HDMI) | 60 Hz |
Response Time | 1 ms (GtG) | 4 ms (Gray-to-Gray Extreme Mode) |
Brightness | 250 nits (Typical) | 350 nits (Typical) |
Contrast | 1,000:1 (Static) / 20,000,000:1 (Dynamic) | 1,300:1 (Typical) |
Color Gamut | 99% sRGB / 72% NTSC | 99% sRGB |
Color Depth | 16.7M (8-bit) | 1.07 Billion (10-bit via 8-bit + FRC) |
HDR | No (Not supported) | HDR Playback Support (Not VESA Certified) |
Adaptive Sync | AMD FreeSync (G-Sync Compatible) | AMD FreeSync (40Hz - 60Hz) |
Viewing Angles | 178° (H) / 178° (V) | 178° (H) / 178° (V) |
Curvature | Flat | Flat |
Speakers | No (None) | 2x 3 W (Stereo) |
Ports | 2x HDMI 1.4; 1x DisplayPort 1.2; 1x 3.5mm Audio Out | 2x HDMI 2.0; 1x DisplayPort 1.2; 1x 3.5mm Audio Line-out |
USB C | No | No |
Kvm | No | No |
Vesa | 75 x 75 mm | 100 x 100 mm |
Ergonomics | Tilt only (-5° to 20°) | Height (110mm), Tilt (-5° to 21°), Swivel (-30° to 30°), Pivot (90°) |
Power Consumption | 30 W (Max) / 0.5 W (Standby) | 28 W (Typical) / 52 W (Max) / 0.3 W (Standby) |
Weight With Stand | 3,060 g (6.75 lbs) | 6,400 g (14.11 lbs) |
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KOORUI 24E3 165Hz Gaming Monitor
23.8" Viewable (24" Class)
1920 x 1080 (FHD)
16:9
IPS (Fast IPS)
165 Hz (via DisplayPort) / 144 Hz (via HDMI)
1 ms (GtG)
Pros
- True Fast IPS panel delivers 1ms response times with vibrant 99% sRGB colors
- High 165Hz refresh rate (via DisplayPort) for competitive esports gaming
Cons
- Stand ergonomics are poor (Tilt only; no height adjustment)
- HDMI ports are limited to 144Hz (must use DisplayPort for full 165Hz)
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
Which one is better?
The KOORUI 24E3 165Hz Gaming Monitor is the better buy for most people - its 165Hz refresh rate crushes the Dell's 60Hz. That said, grab the Dell S2721QS if you prioritize 4K resolution and large screen space for tasks like video editing - it's perfect for that need.
Who should buy each?
Choose the KOORUI 24E3 165Hz Gaming Monitor if: you game competitively with fast-paced titles, you want a budget-friendly option, or you prioritize smooth motion in action scenes. (23.8" display, 165 Hz refresh)
Choose the Dell S2721QS 27" 4K UHD IPS Monitor if: you work in graphic design or photography, you enjoy watching 4K movies regularly, or you need a monitor with a fully adjustable stand.
Quality Seekers
Higher user rating (4.4★ vs 4.3★) indicates better overall satisfaction
→ Choose Dell S2721QS
Safe Choice Buyers
More widely tested with 3,500 reviews vs 1,905
→ Choose KOORUI 24E3
Premium Buyers
Higher-tier option with more premium features and build quality
→ Choose Dell S2721QS
Value Seekers
Better value proposition for buyers who don't need top-tier features
→ Choose KOORUI 24E3
Conclusion
KOORUI 24E3 165Hz Gaming Monitor and Dell S2721QS 27" 4K UHD IPS Monitor are both solid choices. Match the strengths above to your budget and workflow to make the best call.
Bottom line: The Dell S2721QS 27" 4K UHD IPS Monitor leads with a 4.4★ rating versus 4.3★. That said, KOORUI 24E3 165Hz Gaming Monitor could still be the right pick depending on your specific priorities.
Frequently Asked Questions
+Which is better: KOORUI 24E3 165Hz Gaming Monitor or Dell S2721QS 27" 4K UHD IPS Monitor?
KOORUI 24E3 165Hz Gaming Monitor is the better choice if you prioritize true fast ips panel delivers 1ms response times with vibrant 99% srgb colors. Dell S2721QS 27" 4K UHD IPS Monitor wins if you value razor-sharp 4k resolution (163 ppi) delivers excellent text clarity. Both are rated highly (4.3★ vs 4.4★), so consider your specific needs and budget.
+What are the main differences between KOORUI 24E3 165Hz Gaming Monitor and Dell S2721QS 27" 4K UHD IPS Monitor?
Key differences: KOORUI 24E3 165Hz Gaming Monitor offers true fast ips panel delivers 1ms response times with vibrant 99% srgb colors, while Dell S2721QS 27" 4K UHD IPS Monitor stands out with razor-sharp 4k resolution (163 ppi) delivers excellent text clarity. Consider that KOORUI 24E3 165Hz Gaming Monitor stand ergonomics are poor (tilt only; no height adjustment). Meanwhile, Dell S2721QS 27" 4K UHD IPS Monitor limited to 60hz, making it less suitable for fast-paced gaming. 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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