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Full specifications
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LAUNCH DATE3 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Announced | 2025, December (launched first in China); shown for North America at CES 2026 | 2025, September 19 (US availability December 2025) |
| Released | 2026-01-06 (US pre-orders open at LG.com) | — |
| Status | Available | Available |
ADDITIONAL INFORMATION5 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Colors | Black | — |
| Compatibility | Tom's Guide (tested with an RTX 5090) notes very few games reach frame rates high enough to use the 540Hz / 720Hz modes | Consoles: HDMI 2.1 with ALLM, VRR and eARC; USB-C 90W for laptops |
| Launch Price (USD) | $999.99 (US launch MSRP) | $999 (US launch price) |
| Models | 27GX790B-B | — |
| Price in Nigeria | ₦1,400,000 (estimate, converted from US launch price) | ₦1,398,600 (estimate, converted from US launch price) |
TESTS4 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Brightness Measured | 249 nits SDR, 561 nits HDR (Tom's Guide) | 265 nits full-field SDR, ~400 nits 25% window in default mode (Tom's Hardware); 260 nits SDR, 820 nits HDR (Notebookcheck) |
| Color Accuracy | Delta E 0.33 (Tom's Guide) | Delta E 1.09 (Display P3), 0.90 (sRGB); 102.96% DCI-P3 (Tom's Hardware); Delta E 1.05 (Notebookcheck) |
| Input Lag | — | 18 ms (Tom's Hardware) |
| Response Time Measured | — | 4 ms full white-field draw (Tom's Hardware); 1.6 ms black-white, 1 ms grey-grey (Notebookcheck) |
DESIGN AND BUILD6 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Dimensions (with stand) | 605.2 x 527.6 x 220 mm (raised) / 605.2 x 397.6 x 220 mm (lowered) | 537.26 x 610.91 x 223.48 mm (H x W x D) |
| Panel Type | WOLED (4th Gen Primary RGB Tandem OLED) | QD-OLED (4th gen) |
| Screen Size | 26.5 inches (67.3 cm), 27-inch class | 26.5 inches (27-inch class) |
| Stand Adjustments | Tilt / Height / Swivel / Pivot (110 mm height adjustment) | Tilt -5° to +15°, swivel ±15°, height 100 mm (no pivot) |
| VESA Mount | 100 x 100 mm | 100 x 100 mm |
| Weight (with stand) | 6.8 kg | 7.43 kg (5.14 kg without stand) |
DISPLAY AND RESOLUTION12 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Aspect Ratio | 16:9 | 16:9 |
| Brightness | 335 cd/m² typical (300 cd/m² min); HDR peak 1,500 cd/m² (1.5% APL), 800 cd/m² (10% APL) | 250 nits typical; 1000 nits peak (HDR) |
| Color Depth | 1.07 billion colours (10-bit) | 1.07 billion colors |
| Color Gamut | DCI-P3 99.5% typical (CIE1976); 94% min | 99% P3 (DCI-P3); Delta E <2 |
| Contrast Ratio | 1,500,000:1 typical (1,200,000:1 min) | 1,500,000:1 (native) |
| HDR Support | VESA DisplayHDR True Black 500, HDR10, HDR Effect | VESA DisplayHDR True Black 400 |
| Pixel Density | 110 PPI (pixel pitch 0.2292 x 0.2292 mm) | 166 PPI |
| Refresh Rate | 540Hz at QHD; 720Hz at HD (Dual Mode) | 240 Hz |
| Resolution | 2560 x 1440 (QHD); HD in 720Hz Dual Mode | 3840 x 2160 (4K UHD) |
| Response Time | 0.02ms (GtG) | 0.03 ms (GtG) |
| Screen Coating | Matte anti-glare | Glossy (glare) |
| Viewing Angles | 178° (R/L), 178° (U/D) | 178°/178° |
GAMING FEATURES3 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Adaptive Sync | NVIDIA G-SYNC Compatible, AMD FreeSync Premium Pro, VRR (48–540Hz range with LFC) | AMD FreeSync Premium Pro; G-Sync Compatible |
| Gaming Aids | Black Stabilizer, Crosshair, FPS Counter | Crosshair, FPS counter, Blur Reduction, Light Tuner, Color Vibrance, 12 colour modes incl. game-art presets (Color Shuttle) |
| Low Input Lag Mode | Dynamic Action Sync (DAS) | Auto Low Latency Mode (ALLM) and VRR for consoles |
CONNECTIVITY6 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Audio Out | 4-pole headphone jack | Headphone jack |
| DisplayPort | 1x DisplayPort 2.1 with DSC (UHBR13.5) | 1x DisplayPort 1.4 |
| Ethernet / KVM | — | Built-in KVM switch |
| HDMI | 2x HDMI 2.1 | 2x HDMI 2.1 (one with eARC) |
| USB Hub | 2x USB 3.0 downstream (Type-A) | USB-C upstream (USB 3.2 Gen 1, data); 2x USB-A (4.5W) + 1x USB-C (7.5W) downstream, USB 3.2 Gen 1 |
| USB-C | 1x USB-C (DisplayPort Alt Mode, data) | 1x USB-C with DP Alt Mode and 90W power delivery |
POWER3 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Power Consumption | Sleep <0.5W; Off <0.3W | 37 W normal, 230 W max, <0.5 W sleep |
| Power Supply | External power adapter | Built-in |
| Voltage | 100–240V AC, 50/60Hz | 100-240V |
EXTRAS AND FEATURES3 fields
| Specification | UltraGear OLED 27GX790B | MOBIUZ EX271UZ |
|---|---|---|
| Eye Care | Flicker-free, Discomfort Glare Free, Eyesafe 3.0; UL-verified anti-glare, flicker-free, low/reduced blue light and reduced circadian stimulation | Flicker-free (TÜV certified), hardware Low Blue Light (TÜV certified), Color Weakness mode |
| Other Features | Unity Hexagon RGB lighting; VESA ClearMR 21000; UL 'Perfect Black' and 'Perfect Color' certifications; HW calibration ready; Reader Mode; PiP/PbP; HDMI 2.1 and DisplayPort 2.1 cables in the box | Remote control; OLED care (pixel refresh, idle dimmer, logo dimming, pixel shift, thermal design); factory calibration report; HDMI CEC; 3-year warranty |
| Speakers | — | None (no built-in speakers) |