iiyama GB2771UHSU Review (Budget 4K Dual-Mode)

1. Introduction2. Design3. On-screen Display (OSD)4. Panel Analysis: SDR5. Response Times & Motion Clarity6. Input Latency7. Closing Thoughts8. View All Pages

It's not often that we review products here at KitGuru that we outright cannot recommend, but today's monitor falls into that category. We're looking at the iiyama GB2771UHSU, a 27in IPS monitor with dual-mode functionality – offering support for either 4K/144Hz or 1080p/288Hz depending on your preference. On top of that it has a claimed brightness of 450 nits, along with contrast of 1500:1, all on offer for just £240. It sounds good on paper, but as we find out, real-world usage is another thing entirely…

Timestamps

00:00 Intro
00:54 iiyama’s new range
01:22 We’re doing things differently today
01:55 Response time testing – ouch!
04:20 Motion clarity examples
06:06 Real-world gaming experience
07:29 Panel analysis / factory calibration
09:24 More bad news – sRGB mode
10:42 Quick look at the design
12:22 Closing thoughts

Launched only at the start of November, iiyama got in touch with us earlier this year to let us know a new wave of Fast IPS and IPS screens would be hitting the market before the end of the year – the GB2771UHSU included. Dual-mode has proven popular this year so when the company offered to send us this new model, we jumped at the chance. Join us for our usual detailed analysis as we explain why this is not a monitor you should be adding to your shortlist in 2025.

Specification:

• Design: 4-side slim bezel
• Diagonal: 27″, 68.6cm
• Panel: IPS
• Native resolution: 3840×2160 @144Hz
• Dual mode: 1920 x 1080 @288Hz
• Aspect ratio: 16:9
• Panel brightness: 450 cd/m²
• Static contrast: 1500:1
• Advanced contrast: 100M:1
• Response time (MPRT): 0.8ms (min.)
• Viewing zone: 178°/178°, right/left 89°/89°, up/down 89°/89°
• Colour support: 1.07B 8bit+FRC
• Horizontal sync: 30 – 360kHz
• Viewable area (W x H): 596.7 x 335.7mm (23.4 x 13.2″)
• Pixel pitch: 0.155mm
• Colour: matte, black
• Signal input: HDMI x2 (v2.1, max 3840×2160 @144Hz, 1920×1080 @288Hz); DisplayPort x1 (v1.4 DSC, max 3840×2160 @144Hz, 1920×1080 @288Hz)
• USB hub: 4x (2x v3.2 Gen1 Type-A 5Gbps 4.5W, 2x v3.2 Gen1 Type-C 5Gbps 7.5W)
• HDCP: yes
• Headphone connector: yes
• Blue light reducer: yes
• Flicker free: yes
• Adaptive Sync support: AMD FreeSync Premium / NVIDIA G-SYNC Compatible
• Extra: i-Style Colour
• HDR: HDR400
• Speakers: 2 x 2W
• Convenience: Kensington-lock™ prepared, DDC/CI
• Display position adjustments: height, swivel, tilt, pivot (both sides)
• Height adjustment: 150mm
• Rotation (pivot): 90°
• Swivel stand: 90°; 45° left; 45° right
• Tilt angle: 23° up; 5° down
• VESA mounting: 100 x 100mm
• Cable management system: yes

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