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iiyama GB2771UHSU: Detailed Review of a Deficient Dual-Mode Monitor
This analysis reveals that the iiyama GB2771UHSU, despite its promising specifications such as dual-mode functionality (4K/144Hz or 1080p/288Hz) and an attractive price, presents serious performance issues, especially in response times. This makes it unsuitable for gaming and disappointing overall, despite some positive aspects such as brightness and contrast. The sRGB mode does not work correctly, which limits its usefulness for content creation.
1. ⚠️ Introduction: A Monitor with Wasted Potential
- ❌ The iiyama GB2771UHSU is a 27-inch IPS monitor with dual-mode functionality (4K/144Hz or 1080p/288Hz) that, despite sounding good on paper, does not meet expectations in real-world use.
- 💰 It is offered for £240, with a brightness of 450 nits and a contrast ratio of 1,500:1.
- 📅 Launched in early November, it attracted attention for its price and features, but quickly revealed itself to be problematic.
00:00 - 01:25
1. ⚠️ Introduction: A Monitor with Wasted Potential
- ❌ The iiyama GB2771UHSU is a 27-inch IPS monitor with dual-mode functionality (4K/144Hz or 1080p/288Hz) that, despite sounding good on paper, does not meet expectations in real-world use.
- 💰 It is offered for £240, with a brightness of 450 nits and a contrast ratio of 1,500:1.
- 📅 Launched in early November, it attracted attention for its price and features, but quickly revealed itself to be problematic.
01:26 - 04:03
2. 🎮 Critical Response Time Issues: Unacceptable for Gaming
- ⏱️ The main problem is the slow response times. Even with the fastest overdrive setting (OD5), the average response time at 288 Hz is 11.22 ms, which is unacceptably slow for a 2025 monitor.
- 📉 Even using a 10 to 90% tolerance, the average response time at 288 Hz with OD5 is still over 8.3 ms.
- 📉 At 144 Hz, the response time improves slightly to 8.49 ms with OD5, but introduces excessive overshoot, making OD4 the best option, although it is still slow with an average of 9.87 ms.
- ❗ The monitor is too slow to be recommended for gaming today.
04:04 - 06:08
3. Visualization of the Lack of Clarity in Motion and Comparison with the Competition
- 👻 Blurbusters UFO tests show significant ghosting, even at 288 Hz. OD4 mode also exhibits overshoot at 144 Hz.
- 🆚 Compared to the competition, such as the Philips Evnia 27M2N3501PA and the AOC U27G4R, the iiyama GB2771UHSU offers a much blurrier image with more ghosting.
- 💡 The backlight strobe mode (MBR) helps with motion clarity, but does not correct the slow response times and reduces the brightness from almost 500 nits to 304 nits. Also, it does not work with adaptive sync.
06:09 - 07:31
4. ❌ Poor Gaming Experience: Not Recommended for Gamers
- 🎮 The monitor is not suitable for gaming due to the lack of clarity and fluidity, both in 1080p and 4K modes.
- 🔄 Switching between dual modes is cumbersome, requiring several steps in the menu.
- ⚡ The latency is low, with 1.88 ms at 288 Hz, but this does not compensate for the slow pixel response times.
07:32 - 09:26
5. 🎨 Panel Analysis: Mixed Performance for Content Creators
- 🔆 The monitor reaches almost 500 nits of brightness and a good contrast of 1,600:1, which is positive.
- ✅ The screen uniformity is acceptable, without significant deviations.
- 🌈 The color gamut is wide, exceeding the sRGB space and covering 97.6% of DCI-P3 and 94.5% of Adobe RGB.
- ⚠️ The factory calibration is poor, with a green tint and incorrect gamma.
- 🎨 The saturation performance is good, but the color accuracy is mediocre in sRGB (delta E of 3.34), improving in DCI-P3 (delta E of 2.67).
09:27 - 10:41
6. 🔴 Defective sRGB Mode and General Design
- 🔴 The sRGB mode does not work correctly, as the color gamut is not limited and the color balance does not improve.
- 🛠️ The design is minimalist, with a matte black chassis and stand.
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10:42 - 12:24
7. 📐 Design and Functionality: Limited Positive Aspects
- 📏 The compact stand offers ergonomic adjustments: 150 mm height adjustment, 45 degrees of swivel, -5 to +23 degrees of tilt, and 90 degrees of pivot functionality. VESA 100x100 support.
- 🔌 Connectivity: 2 HDMI 2.1 ports, 1 DisplayPort 1.4, USB upstream, 2 USB type A downstream, and 2 USB type C 3.2 Gen 1 (no DP or KVM support, 7.5W power delivery).
- 🕹️ Joystick for OSD navigation, which has been improved compared to previous iiyama models.
12:25 - 14:41
8. 🚫 Conclusion: A Big Disappointment and Not Recommended
- ❌ The iiyama GB2771UHSU is a big disappointment due to its slow response times, defective sRGB mode, and mediocre calibration.
- 👎 It cannot be recommended in 2025, especially considering the competition in the gaming monitor market.
- ✅ Positive aspects: high brightness and good contrast, but they are not enough to compensate for the main problems.