Corsair Xeneon 27QHD240 OLED Gaming Monitor vs iiyama G-Master GB2770QSU 27-inch 165Hz QHD (2026)

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

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

Corsair Xeneon 27QHD240 OLED Gaming Monitor

9.3/10 Excellent

4.5★ (2,200 owners)

27" 1440p QD-OLED 240Hz, 0.03ms, USB-C 90W, 3-year burn-in warranty. The QD-OLED with warranty.

Full Review

iiyama G-Master GB2770QSU 27-inch 165Hz QHD

8.9/10 Great

4.5★ (3,600 owners)

27" 1440p 165Hz IPS, 1ms, FreeSync, USB hub, 100W USB-C. Underrated 1440p value monitor.

Full Review

At a Glance

	Corsair Xeneon 27QHD240 OLED Gaming Monitor	iiyama G-Master GB2770QSU 27-inch 165Hz QHD
247Verdict Score	9.3/10	8.9/10
Owner Rating	4.5★ (2,200)	4.5★ (3,600)
Verdict	Excellent	Great
Panel	QD-OLED	IPS
Refresh	240Hz	165Hz

Quick Verdict

Both are strong choices, but the Corsair Xeneon 27QHD240 OLED Gaming Monitor edges ahead with a 9.3/10 vs 8.9/10. 27" 1440p QD-OLED 240Hz, 0.03ms, USB-C 90W, 3-year burn-in warranty. The QD-OLED with warranty. That said, the iiyama G-Master GB2770QSU 27-inch 165Hz QHD is worth considering if 27" 1440p 165Hz IPS, 1ms, FreeSync, USB hub, 100W USB-C. Underrated 1440p value monitor. Check the current price on Amazon →

Pros & Cons Side by Side

Corsair Xeneon 27QHD240 OLED Gaming Monitor

QD-OLED panel delivers infinite contrast and vivid quantum dot colour at 27-inch 1440p
3-year burn-in warranty — among the most reassuring OLED warranty coverage available
240Hz with 0.03ms response for competitive and immersive gaming
USB-C 90W charges a laptop and connects peripherals through one cable
Corsair ecosystem integration with iCUE software

£900+ QD-OLED pricing
OLED burn-in caution still applies despite the warranty
Corsair monitor range less established than its peripherals

iiyama G-Master GB2770QSU 27-inch 165Hz QHD

100W USB-C charges and connects a laptop with one cable — the highest USB-C wattage in budget gaming monitors
USB hub with 2x USB-A passes through from USB-C connection — desk tidy organisation
1440p 165Hz IPS at under £250 — competitive with LG UltraGear at lower pricing
iiyama's 30-year professional monitor heritage — OEM supplier to major display brands
FreeSync Premium for tear-free AMD GPU gaming

iiyama brand less recognised than LG or Samsung in consumer gaming market
Lower peak brightness than premium alternatives for HDR content
Limited HDR400 tier — not genuine HDR performance

FAQ

Which is better, Corsair Xeneon 27QHD240 OLED or iiyama G-Master GB2770QSU 27-inch?

Is the Corsair Xeneon 27QHD240 OLED worth the extra cost?

Yes — Corsair Xeneon 27QHD240 OLED Gaming Monitor scores higher at 9.3/10 vs 8.9/10.

Who is the Corsair Xeneon 27QHD240 OLED best suited to?

27" 1440p QD-OLED 240Hz, 0.03ms, USB-C 90W, 3-year burn-in warranty. The QD-OLED with warranty.

Who is the iiyama G-Master GB2770QSU 27-inch best suited to?

27" 1440p 165Hz IPS, 1ms, FreeSync, USB hub, 100W USB-C. Underrated 1440p value monitor.

What are the main downsides of each?

Corsair Xeneon 27QHD240 OLED Gaming Monitor: £900+ QD-OLED pricing; OLED burn-in caution still applies despite the warranty. iiyama G-Master GB2770QSU 27-inch 165Hz QHD: iiyama brand less recognised than LG or Samsung in consumer gaming market; Lower peak brightness than premium alternatives for HDR content.

Do owner ratings agree with our verdict?

Largely, yes — Corsair Xeneon 27QHD240 OLED Gaming Monitor sits at 4.5★ from 2,200 verified Amazon owners, and iiyama G-Master GB2770QSU 27-inch 165Hz QHD at 4.5★ from 3,600.

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