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LG · OLED · 33.9"

34GX90SA

3440×1440 · 240 Hz · Ultrawide · Curved · DisplayHDR 400 True Black

Overall
75
Work
64
Play
89
Amazon
$700
34GX90SA
View 34GX90SA Gallery in high resolution
$700
Available on Amazon Updated Aug 30, 2026 Prime FBA
Overall75.4
Work63.7
Play88.9
Refresh100.0
Response100.0
Color100.0
Quality / price21.5
$700 on Amazon Add this monitor to a build Compare this monitor Monitor table

Written analysis

34GX90SA at a glance

The 34GX90SA is a 33.9" OLED monitor at 3440×1440 and 240 Hz. The listed aspect ratio is ultrawide. The panel is curved at 800R.

Best fit: high-refresh gaming and fast-paced entertainment, provided the GPU can feed this resolution.

Panel and image

Overall quality is 75.4, with 63.7 work and 88.9 play. Pixel density is listed at 109 PPI. Contrast is listed as 1500000:1. The coating is Anti-glare/Matte. The listed pixel count is treated as a QHD-class work multiplier.

Color and HDR

Recorded gamut coverage is 98.5% DCI-P3. Color depth is listed as 10-bit native. HDR is listed as DisplayHDR 400 True Black.

Motion and sync

Refresh is listed at 240 Hz. Response time is listed as 0.03 ms. Input lag is listed as 2.90 ms. The play score covers mainstream gaming and media; competitive high-refresh use still depends on the GPU keeping up. Pair this resolution with the GPU table before assuming native high settings.

Ergonomics and connectivity

Stand and mount options are listed as Height · Swivel · Tilt · VESA (100x100mm). Recorded inputs include 1 x USB 3.2 (Type-C; upstream; 65W; DP Alt Mode), 2 x USB 3.2 (Type-A; downstream), 2 x HDMI 2.1, 2 x DisplayPort 1.4, 1 x 3.5 mm Audio Out.

Buying verdict

Overall quality is 75.4, a strong mainstream result for a primary desktop display.

At the recorded Amazon price, quality / price is 21.5. The nearby comparison below may reveal a better-equipped option at a similar price.

Work / price is 18.2 and play / price is 17.8.

Display data

Full specifications

Panel, color, motion, connectivity, ergonomics, power, and value in one sheet.

General

Manufacturer
LG
Monitor
34GX90SA
Series
UltraGear
Panel maker
LG Display
Launch price
—
Amazon price
$700
Amazon availability
Available
Price updated
Aug 30, 2026
Launch date
Jan 1, 2025

Panel

Size
33.9"
Panel type
OLED
Resolution
3440×1440
Aspect ratio
2.389:1
Pixel density
109 PPI
Brightness
—
Contrast
1500000:1
Display area
95.35 in²
Viewing angles
178 ° (degrees) / 178 ° (degrees)
Backlight
—
Coating
Anti-glare/Matte
Curvature
800R

Color & HDR

Color depth
10-bit native
Colors
1073741824
DCI-P3
98.50%
sRGB
—
Adobe RGB
—
NTSC
—
HDR
DisplayHDR 400 True Black
Local dimming
No

Motion

Refresh rate
240 Hz
Response time
0.03 ms
Input lag
2.90 ms
Adaptive sync
—

Connectivity

Inputs
1 x USB 3.2 (Type-C; upstream; 65W; DP Alt Mode), 2 x USB 3.2 (Type-A; downstream), 2 x HDMI 2.1, 2 x DisplayPort 1.4, 1 x 3.5 mm Audio Out
Speakers
—

Ergonomics

Height adjustment
Yes
Pivot
No
Swivel
Yes
Tilt
Yes
VESA mount
Yes · 100x100mm

Power & value

Typical power
—
Max power
—
Overall
75.4
Work
63.7
Play
88.9
Quality / price
21.5
Work / price
18.2
Play / price
17.8

Additional information

Features
4-Side Virtually Borderless Design, AMD FreeSync Premium Pro, Auto Input Switch, Black Stabilizer, Color Calibrated, Color Weakness Mode, Crosshair, Display Stream Compression (DSC), Dual Controller, Dynamic Action Sync, FPS Counter, HDR Effect, NVIDIA G-Sync Compatible, Picture-by-Picture, Picture-in-Picture, Picture Mode, Reader Mode, RGB Hexagon LED Lighting, Smart Energy Saving, True Color Pro, User Define Key, VESA ClearMR 13000
Accessories
DisplayPort cable, HDMI cable
Amazon warranty
2 Year Manufacturer
Amazon dimensions
{'width': 30.87, 'height': 22.85, 'length': 11.49, 'weight': 22.93}

Extracted notes sit here. Amazon listing copy, when present, is at the bottom of the page.

Amazon

Price history

Nearby quality

Similar monitors

OLED monitors close to 34GX90SA on overall quality. Open the monitor table to sort, filter, and compare side by side.

LG 34GS95QE 33.9" · OLED · 3440×1440 · 240 Hz
74.4
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21.3
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LG 45GX900A 44.5" · OLED · 3440×1440 · 240 Hz
74.5
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12.4
$1202
LG 27GX790A 26.5" · OLED · 2560×1440 · 480 Hz
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LG 34GX900A 33.9" · OLED · 3440×1440 · 240 Hz
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$637
LG 34GX900A 33.9" · OLED · 3440×1440 · 240 Hz
75.8
89.7
25.3
$600
LG 27GS95QE 26.5" · OLED · 2560×1440 · 240 Hz
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Compare these in the monitor table

Discussion

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Vendor copy

Amazon listing details

Marketplace feature text kept for reference. Structured specifications above are the source for scores and comparisons.

The 240Hz OLED Smart Gaming Monitor that’s Ahead of the (800R) Curve - The 34” WQHD OLED with a steep 800R curve and 1300-nit peak brightness pulls you deep into the action, while a 240Hz refresh rate and 0.03ms response time keep gameplay insanely fast and smooth. Plus, LG’s webOS lets you stream your favorites and cloud game—all from one epic screen.

Up to 240Hz & 0.03ms – Outrageous OLED Gaming Speed - Game at the speed of OLED with an ultra-fast 240Hz and near instantaneous 0.03ms (GtG) response time. The faster speed lets you respond quickly to opponents and enjoy smoother scenes with less lag or ghosting.

Your Favorite Streaming Services Plus Cloud Gaming - Thanks to webOS24, find your favorites fast with built-in access to Netflix, Prime Video, the Apple TV app, Disney+, HBO Max. And over 300 free LG Channels with everything from comedy to movies to sports. Game without a PC or console! Connect to your favorite cloud gaming services such as NVIDIA GeForce NOW, Amazon Luna, and Blacknut directly from the webOS home screen.

Ultimate Frame Sync: FreeSync Premium & G-SYNC Compatible - Say goodbye to screen tearing and stutter. With AMD FreeSync Premium and NVIDIA G-SYNC compatibility, this OLED monitor delivers ultra-smooth, tear-free visuals, giving you perfect frame sync across PC and next-gen console gaming.

Bright Picture. Deep Blacks, Brilliant Detail: OLED Gaming FTW - Get lost in vivid visuals with OLED technology, delivering exceptional brightness, up to 98.5% of DCI-P3 color coverage, a 1.5M:1 contrast ratio, and DisplayHDR True Black 400. Every gaming scene pops with deep blacks, brilliant highlights, and cinematic color.

The 800R Curve: Surround Yourself in the Action - See and feel the action all around you with the dramatic 800R curve. This steep curvature extends your periphery, pulling you deeper into the game and making the action more intense.

Low Glare, More Focus: Play without Distractions - Stay in the zone with an OLED screen that’s designed to minimize glare and reflections. The anti-glare surface reduces light distractions, so you can keep your attention where it matters—on every move, every target, and every win.

webOS Gaming: AI Tools Customize Your Gaming Experience - Dynamic Action Sync reduces input lag for real-time response. Black Stabilizer brightens dark scenes to see what's hidden. FPS Counter shows your real-time frame rate. Crosshair enhances precision for deadly accuracy.

OLED Protection: 2-Year Limited Warranty & Panel Care Tools - Rest easy knowing your OLED monitor is built to last. The 2-year limited warranty covers key components, including the OLED panel. And OLED Care tools such as pixel cleaning keep your display sharp, for reliable top-tier performance. Please see Warranty Information on this page for all warranty details.

Serious Connectivity for Serious Gamers - For next gen console gaming or PC gaming, with HDMI 2.1, DisplayPort 1.4 and USB Type-C (65W power delivery), UltraGear's versatile connectivity enables high-resolution graphics, and fast, fluid gaming.

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