LG UltraGear 39" 240Hz WQHD 0.03ms HDR400 Curved OLED Gaming Monitor w/ Smart WebOS 39GX90SA-W
Model # 39GX90SA-W
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SKU: 39GX90SA-W
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LG UltraGear™ 39GX90SA-W
39" 5K2K WOLED with 21:9 curve, fast gaming refresh, and creator-friendly clarity.
Key notes
- 5K2K (5120×2160) 21:9 WOLED, high pixel density for sharp UI and media.
- High refresh with ultra-low 0.03ms GtG; VRR-ready (AdaptiveSync / G-SYNC Compatible / FreeSync Premium Pro).
- DP 2.1, HDMI, USB-C with power delivery, ergonomic stand, anti-glare and low blue light.
PCWorld: “Beats its OLED rivals; a top pick for immersive HDR gaming.”
TechRadar: “Ultrawide OLED that pulls you straight in.”
Tom’s Guide: “One of the most impressive gaming monitors I’ve tested.”
Wide 5K2K canvas lets you juggle gaming, editing, and calls on one curved screen.
21:9 view keeps immersion without the fisheye feel of 32:9 super-ultrawide panels.
UltraGear branding stacked with the hero view shows slim bezels and sweeping curve.
Quick summary still of the OLED’s curve, bezel-light frame, and workspace.
MLA+ WOLED panel boosts brightness while keeping true blacks.
5K2K 21:9 view gives creators and gamers more horizontal room to work.
Bright HDR highlights pop thanks to MLA+ efficiency.
800R curve wraps your view for deeper, more natural immersion.
Anti-glare and low blue light keep the picture clear and comfortable.
High refresh handling shown for fast action scenes.
Dual-Mode contrasts fidelity at 165Hz with esports speed at 330Hz.
0.03ms GtG keeps motion crisp with minimal blur.
DisplayPort 2.1 delivers bandwidth for 5K2K at high refresh.
USB-C port handles display, data, and up to 90W charging in one cable.
Premium build suits a high-end gaming or creator desk.
AdaptiveSync, G-SYNC Compatible, and FreeSync Premium Pro keep gameplay smooth.
Certification logos reinforce sync and performance credentials.
Dual 10W speakers and DTS Headphone:X support add punchy, positional audio.
LG Switch app lets you hotkey refresh changes and split-screen layouts.
Front view highlights the near-borderless design and tidy stand.
Side profile shows the sweep of the 800R curve and slim chassis.
Rear lighting and cable routing keep the setup clean and accented.
HDR True Black and wide gamut deliver rich contrast and color.
125 PPI RGWB subpixel layout keeps fine details sharp.
On-screen control app centralizes OLED care and presets.
Brightness control inside the gaming GUI for quick tweaks and panel protection.
Peak brightness controls shown together to capture the full menu flow.
OLED screen move menus keep pixels shifting to ward off retention.
Dual-Mode options line up aspect and refresh presets for quick swaps.
Advanced gaming HUD adds Dynamic Action Sync, Black Stabilizer, Crosshair, and FPS counter tools.
(39GX90SA-W)
LG UltraGear™ 39GX90SA-W
39-inch 21:9 OLED gaming monitor with 3440 x 1440 resolution, 240 Hz refresh, 0.03 ms GtG response, DisplayHDR True Black, and ergonomics for immersive play and productivity.
Key Specs
| Display Size | 39 in (99.1 cm) |
| Resolution | 3440 x 1440 |
| Panel | OLED, 21:9, Anti-Glare |
| Brightness (Typ.) | 275 cd/m2 (250 cd/m2 min) |
| Curvature | 800R |
| Refresh Rate | 240 Hz |
| Response Time | 0.03 ms (GtG) |
| Colour Gamut (Typ./Min.) | DCI-P3 98.5% / 94.0% (CIE1976) |
| Contrast Ratio (Typ./Min.) | 1,500,000:1 / 1,200,000:1 |
| Stand Adjustments | Tilt / Height / Swivel |
All Specifications
Display
| Size (inch / cm) | 39 / 99.1 |
| Resolution | 3440 x 1440 |
| Aspect Ratio | 21:9 |
| Panel Type | OLED |
| Surface | Anti-Glare |
| Pixel Pitch | 0.266 x 0.266 mm |
| Colour Depth | 1.07B |
| Viewing Angle (CR ≥10) | 178 deg (R/L), 178 deg (U/D) |
| Brightness (Typ./Min.) | 275 / 250 cd/m2 |
| Contrast Ratio (Typ./Min.) | 1,500,000:1 / 1,200,000:1 |
| Curvature | 800R |
| Colour Gamut (Typ./Min.) | DCI-P3 98.5% / 94.0% (CIE1976) |
| Refresh Rate (Max.) | 240 Hz |
| Response Time | 0.03 ms (GtG) |
Connectivity
| HDMI | Yes (2) |
| DisplayPort | Yes (1, DP 1.4 DSC) |
| USB-C | Yes (video/data, 65 W PD) |
| USB Downstream | Yes (2, USB 2.0) |
| USB Upstream | Via USB-C |
| RJ-45 | Yes |
| Headphone Out | 3-pole (sound) |
| Daisy Chain / KVM | No / No |
Features
| HDR10 | Yes |
| VESA DisplayHDR | DisplayHDR True Black 400 |
| AMD FreeSync | FreeSync Premium |
| NVIDIA G-SYNC | G-SYNC Compatible |
| Variable Refresh Rate | Yes |
| Auto Brightness | Yes |
| PIP / PBP | Yes / 2PBP |
| Dynamic Action Sync / Black Stabilizer | Yes / Yes |
| Crosshair / FPS Counter | Yes / Yes |
| Reader Mode | Yes |
| RGB Lighting | Hexagon Lighting |
| User Defined Key | Yes |
| Auto Input Switch | No |
Mechanical
| Display Position Adjustments | Tilt / Height / Swivel |
| Wall Mount | 100 x 100 mm |
Sound
| Speaker | 7 W x 2 |
| Bluetooth Audio | Yes |
Dimensions / Weights
| Shipping (W x H x D) | 985 x 338 x 550 mm |
| With Stand (W x H x D) | 887.8 x 605.7 x 322.8 mm |
| Without Stand (W x H x D) | 887.8 x 404.4 x 198.0 mm |
| Weight Shipping / With Stand / Without Stand | 17.5 kg / 11.45 kg / 7.30 kg |
Info
| Product Name | UltraGear 39GX90SA-W |
| Year | 2025 |
Power
| Sleep / DC Off | < 0.5 W / < 0.5 W |
| AC Input | 100 – 240 V (50/60 Hz) |
| Type | External Adapter |
Accessory (in box)
| DisplayPort / HDMI / USB-C Cables | Yes / Yes / Yes |
| Remote | Yes |
Software
| Dual Controller | No |
| LG Calibration Studio | No |
| UltraGear Studio | No |
| OnScreen Control | No |
Cyber Security
| Security Updates | Eligible for security updates until 31 Jan 2029 (or later if extended). |
*Specifications summarised from the LG 39GX90SA-W product sheet; values may vary in actual use.
| SKU | 39GX90SA-W |
| Brand | LG |
| Shipping Weight | 17.5000kg |
Manufacturer Warranty: 3 Years Manufacturer Warranty
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