Dell Alienware AW3423DWF 34-inch QD-OLED vs Dell S2721DGF 27-inch 1440p 165Hz Gaming Monitor (2026)

✍️ By the 247Verdict Editorial Team📅 Updated 05 October 2026

Which is better? We compared both on score, owner ratings, pros and cons.

Dell Alienware AW3423DWF 34-inch QD-OLED

9.4/10 Excellent

4.6★ (4,200 owners)

34" 21:9 QD-OLED 165Hz, 0.1ms, 99.3% DCI-P3, 1800R. Ultrawide QD-OLED gaming.

Full Review

Dell S2721DGF 27-inch 1440p 165Hz Gaming Monitor

9.1/10 Excellent

4.7★ (8,400 owners)

27" 1440p IPS 165Hz, 1ms, 98% DCI-P3, G-Sync + FreeSync, USB hub. The value 1440p all-rounder.

Full Review

At a Glance

	Dell Alienware AW3423DWF 34-inch QD-OLED	Dell S2721DGF 27-inch 1440p 165Hz Gaming Monitor
247Verdict Score	9.4/10	9.1/10
Owner Rating	4.6★ (4,200)	4.7★ (8,400)
Verdict	Excellent	Excellent
Panel	QD-OLED	IPS
Size	34" 21:9	27" 1440p
Refresh	165Hz	165Hz
Colour	99.3% DCI-P3	98% DCI-P3

Quick Verdict

Both are strong choices, but the Dell Alienware AW3423DWF 34-inch QD-OLED edges ahead with a 9.4/10 vs 9.1/10. 34" 21:9 QD-OLED 165Hz, 0.1ms, 99.3% DCI-P3, 1800R. Ultrawide QD-OLED gaming. That said, the Dell S2721DGF 27-inch 1440p 165Hz Gaming Monitor is worth considering if 27" 1440p IPS 165Hz, 1ms, 98% DCI-P3, G-Sync + FreeSync, USB hub. The value 1440p all-rounder. Check the current price on Amazon →

Pros & Cons Side by Side

Dell Alienware AW3423DWF 34-inch QD-OLED

QD-OLED panel delivers OLED blacks and Quantum Dot colour accuracy in ultrawide format
34-inch 21:9 ultrawide at QD-OLED quality — the best ultrawide gaming display available
0.1ms response time combines ultrawide immersion with OLED responsiveness
1800R curvature wraps the ultrawide display naturally around field of view
99.3% DCI-P3 serves professional creative work alongside gaming immersion

£750+ — QD-OLED ultrawide premium pricing
21:9 aspect ratio has game compatibility limitations for older titles
QD-OLED burn-in risk with static HUD elements over extended gaming periods

Dell S2721DGF 27-inch 1440p 165Hz Gaming Monitor

98% DCI-P3 colour accuracy rivals monitors costing significantly more
165Hz IPS with 1ms response covers competitive and everyday gaming
Both G-Sync Compatible and FreeSync Premium Pro for any GPU
USB hub and fully ergonomic stand for a complete desk setup
Dell's reliability and warranty service backing 8,400 reviews at 4.7★

165Hz trails 240Hz alternatives for top-tier competitive play
IPS contrast lower than OLED for dark-scene atmosphere
HDR400 tier — not genuine HDR brightness

FAQ

Which is better, Dell Alienware AW3423DWF 34-inch or Dell S2721DGF 27-inch 1440p?

Is the Dell Alienware AW3423DWF 34-inch worth the extra cost?

Yes — Dell Alienware AW3423DWF 34-inch QD-OLED scores higher at 9.4/10 vs 9.1/10.

Who is the Dell Alienware AW3423DWF 34-inch best suited to?

34" 21:9 QD-OLED 165Hz, 0.1ms, 99.3% DCI-P3, 1800R. Ultrawide QD-OLED gaming.

Who is the Dell S2721DGF 27-inch 1440p best suited to?

27" 1440p IPS 165Hz, 1ms, 98% DCI-P3, G-Sync + FreeSync, USB hub. The value 1440p all-rounder.

What are the main downsides of each?

Dell Alienware AW3423DWF 34-inch QD-OLED: £750+ — QD-OLED ultrawide premium pricing; 21:9 aspect ratio has game compatibility limitations for older titles. Dell S2721DGF 27-inch 1440p 165Hz Gaming Monitor: 165Hz trails 240Hz alternatives for top-tier competitive play; IPS contrast lower than OLED for dark-scene atmosphere.

Do owner ratings agree with our verdict?

Largely, yes — Dell Alienware AW3423DWF 34-inch QD-OLED sits at 4.6★ from 4,200 verified Amazon owners, and Dell S2721DGF 27-inch 1440p 165Hz Gaming Monitor at 4.7★ from 8,400.

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