The iiyama G-Master GB2591HSU-B1 Gold Phoenix is a 25-inch gaming monitor with an IPS panel designed to offer maximum speed and fluidity in competitive gaming. The Full HD (1920x1080) resolution ensures sharp images and ideal performance for eSports and high-intensity games, while the refresh rate of up to 240Hz guarantees exceptional responsiveness. Thanks to the 0.4 ms MPRT response time and Adaptive Sync technology, the monitor effectively reduces motion blur, tearing and stuttering for smoother and more precise gameplay. The 400 cd/m² brightness and wide 178° viewing angle complete an immersive and detailed visual experience.
GB2591HSU-B1 – IPS MONITOR 25" FULL HD IIYAMA G-MASTER - NVIDIA G-SYNC COMPATIBLE - BLACK TUNER
The iiyama G-Master GB2591HSU-B1 Gold Phoenix is a 25-inch gaming monitor with an IPS panel designed for high-performance competitive gaming. Full HD (1920x1080) resolution ensures sharp, eSports-optimized images, while a refresh rate of up to 320Hz ensures extremely smooth and responsive movements. Thanks to an ultra-fast 0.4ms MPRT response time and NVIDIA G-SYNC Compatible / Adaptive Sync technology, the monitor reduces motion blur, tearing and stuttering for more stable gameplay. Up to 400 cd/m² brightness and a wide 178° viewing angle improve visual quality. With advanced features like Black Tuner , it offers greater visibility in dark scenes for a competitive edge.
Main features:
- 25" screen with IPS panel
- Full HD resolution 1920×1080
- Refresh rate up to 320Hz
- Ultra-fast response time 0.4ms MPRT
- NVIDIA G-SYNC Compatible / Adaptive Sync technology
- Black Tuner function
- Brightness 400 cd/m²
- Viewing angle 178° / 178°
Further details
Technical data sheet
| Model | GB2591HSU-B1 |
| DISPLAY CHARACTERISTICS | |
| Diagonal | 31.5", 80cm |
| Panel | Fast IPS |
| Native resolution | 1920 x 1080 @320Hz (2.1 megapixel full HD, DisplayPort) |
| Aspect ratio | 16:9 |
| Brightness | 350 cd/m² |
| Static contrast | 1000:1 |
| Advanced contrast | 100M:1 |
| Response time (MPRT) | 0.4ms |
| Viewing zone | horizontal/vertical: 178°/178°, right/left: 89°/89°, up/down: 89°/89° |
| Color support | 16.7 million 8-bit |
| Horizontal Sync | 30 - 360kHz |
| Viewable area W x H | 543.7 x 302.6mm, 21.4 x 11.9" |
| Pixel pitch | 0.2802mm |
| Color | matte, black |
| INTERFACES / CONNECTORS / CONTROLS | |
| Signal input |
HDMI x2 (v.2.1, max. 3840 x 2160 @144H) |
| USB HUB | x4 (2x Type A v.3.2 Gen 1 (5Gbps, 4.5W), 2x Type C (5Gbps, 7.5W)) |
| HDCP | Yes |
| Headphone connector | Yes |
| FEATURES | |
| Blue light reducer | Yes |
| Flicker free | Yes |
| Adaptive Sync support | G-SYNC - 1920 x 1080 @48-320Hz, DisplayPort Only |
| HDR | Yes, HDR10 Ready |
| OSD languages | EN, DE, FR, ES, IT, RU, JP, CZ, NL, PL |
| Control buttons | power switch, joystick, menu (center), up / signal select, down / shortcut, left / volume -, right / volume + |
| User controls | picture adjust (contrast, brightness, overdrive, HDR, Adaptive Sync, night mode, blue light reducer, Motion Blur Reducer, gamma), input select (input source), audio adjust (volume, mute), store user setting (user modes), color settings (6-axis, color temperature, user preset, black tuner), image adjust (i-Style color, X-Res Technology, sharpness, HDMI range, direct drive mode, video mode adjust), language, setup menu (OSD horizontal position, OSD vertical position, OSD time, opening logo, power LED, DDC/CI control, usb charge), display information, reset (reset all) |
| Speakers | 2 x 4W |
| Convenience | Kensington-lock™ prepared, DDC/CI |
| MECHANICAL | |
| Display position adjustments | height, pivot (rotation), tilt |
| Height adjustment | 150mm |
| Swivel stand | 90°; 45° left; 45° right |
| Tilt angle | 23rd up; 5th down |
| VESA mounting | 100 x 100mm |
| Cable management system | Yes |
| ACCESSORIES INCLUDED | |
| Cables | power (1.8m), USB (1.8m), DP (1.8m) |
| Other | quick start guide, safety guide |
| POWER MANAGEMENT | |
| Power Supply Unit | internal |
| Power Supply | AC 100 - 249V, 50/60Hz |
| Power Usage | 30W typical, 0.5W stand by, 0.3W off mode |
| SUSTAINABILITY | |
| Regulations | CE, TÜV-Bauart, EAC, PSE, RoHS support, ErP, WEEE, VCCI, REACH, UKCA |
| Energy efficiency class (Regulation (EU) 2017/1369) | AND |
| DIMENSIONS & WEIGHT | |
| Product dimensions W x H x D | 557 x 324 x 55.5mm |
| Box dimensions W x H x D | 630 x 504 x 142mm |
| Weight (without box) | 5.3kg |
| Weight (with box) | 8.03kg |



