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Full specifications
Every available group and stored value, aligned by field.
LAUNCH DATE3 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| Announced | 2025, December (launched first in China); shown for North America at CES 2026 | 2026, May 19 |
| Released | 2026-01-06 (US pre-orders open at LG.com) | 2026-09-01 |
| Status | Available | Available |
ADDITIONAL INFORMATION5 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| 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 | — |
| Launch Price (USD) | $999.99 (US launch MSRP) | $999.99 (US launch price) |
| Models | 27GX790B-B | 25G590B (25G590B-B) |
| Price in Nigeria | ₦1,400,000 (estimate, converted from US launch price) | ₦1,400,000 (estimate, converted from US launch price) |
TESTS2 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| Brightness Measured | 249 nits SDR, 561 nits HDR (Tom's Guide) | — |
| Color Accuracy | Delta E 0.33 (Tom's Guide) | — |
DESIGN AND BUILD6 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| Dimensions (with stand) | 605.2 x 527.6 x 220 mm (raised) / 605.2 x 397.6 x 220 mm (lowered) | 571.8 x 511.2 x 207.3 mm |
| Panel Type | WOLED (4th Gen Primary RGB Tandem OLED) | IPS |
| Screen Size | 26.5 inches (67.3 cm), 27-inch class | 24.5 inches |
| Stand Adjustments | Tilt / Height / Swivel / Pivot (110 mm height adjustment) | Height, tilt, swivel |
| VESA Mount | 100 x 100 mm | 100 x 100 mm |
| Weight (with stand) | 6.8 kg | 5.2 kg |
DISPLAY AND RESOLUTION12 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| 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) | 400 nits typical (320 nits min) |
| Color Depth | 1.07 billion colours (10-bit) | 8-bit (16.7 million colors) |
| Color Gamut | DCI-P3 99.5% typical (CIE1976); 94% min | 99% DCI-P3 |
| Contrast Ratio | 1,500,000:1 typical (1,200,000:1 min) | 1000:1 (typical) |
| HDR Support | VESA DisplayHDR True Black 500, HDR10, HDR Effect | VESA DisplayHDR 400 |
| Pixel Density | 110 PPI (pixel pitch 0.2292 x 0.2292 mm) | 0.282 x 0.281 mm pixel pitch |
| Refresh Rate | 540Hz at QHD; 720Hz at HD (Dual Mode) | 1000Hz (native), 1100Hz (overclocked, DisplayPort 2.1) |
| Resolution | 2560 x 1440 (QHD); HD in 720Hz Dual Mode | 1920 x 1080 pixels |
| Response Time | 0.02ms (GtG) | 1ms (GtG) |
| Screen Coating | Matte anti-glare | Low-reflection film, ATW polarizer |
| Viewing Angles | 178° (R/L), 178° (U/D) | 178° / 178° |
GAMING FEATURES3 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| Adaptive Sync | NVIDIA G-SYNC Compatible, AMD FreeSync Premium Pro, VRR (48–540Hz range with LFC) | AMD FreeSync Premium, NVIDIA G-Sync Compatible |
| Gaming Aids | Black Stabilizer, Crosshair, FPS Counter | — |
| Low Input Lag Mode | Dynamic Action Sync (DAS) | — |
CONNECTIVITY5 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| Audio Out | 4-pole headphone jack | Yes, 4-pole headphone out (sound + mic) |
| DisplayPort | 1x DisplayPort 2.1 with DSC (UHBR13.5) | 1x DisplayPort 2.1 (UHBR20) |
| HDMI | 2x HDMI 2.1 | 2x HDMI 2.1 |
| USB Hub | 2x USB 3.0 downstream (Type-A) | USB Type-C |
| USB-C | 1x USB-C (DisplayPort Alt Mode, data) | — |
POWER3 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| Power Consumption | Sleep <0.5W; Off <0.3W | 28 W typical |
| Power Supply | External power adapter | — |
| Voltage | 100–240V AC, 50/60Hz | 100–240 V AC, 50/60 Hz |
EXTRAS AND FEATURES2 fields
| Specification | UltraGear OLED 27GX790B | UltraGear 25G590B |
|---|---|---|
| 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 Safe, Reader 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 | Motion Blur Reduction Pro, AI Scene Optimization, AI Sound; UltraGear emblem RGB lighting |