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LG · OLED · 33.9"

34GX900A

3440×1440 · 240 Hz · Ultrawide · Curved

Overall
76
Work
64
Play
90
Amazon
$600
34GX900A
View 34GX900A Gallery in high resolution
$600
Available on Amazon Updated Aug 30, 2026 Prime FBA
Overall75.8
Work64.3
Play89.7
Refresh100.0
Response100.0
Color100.0
Quality / price25.3
$600 on Amazon Add this monitor to a build Compare this monitor Monitor table

Written analysis

34GX900A at a glance

The 34GX900A 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 75.8, with 64.3 work and 89.7 play. Pixel density is listed at 109 PPI. Typical brightness is 275 nits. 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.

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 2 x USB 3.0 (Type-A; downstream), 1 x USB 3.1 (Type-C; upstream; 65W; DP Alt Mode), 2 x HDMI 2.1, 1 x DisplayPort 1.4, 1 x 3.5 mm Audio Out.

Buying verdict

Overall quality is 75.8, a strong mainstream result for a primary desktop display.

At the recorded Amazon price, quality / price is 25.3. The nearby comparison below may reveal a better-equipped option at a similar price.

Work / price is 21.4 and play / price is 20.9.

Display data

Full specifications

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

General

Manufacturer
LG
Monitor
34GX900A
Series
UltraGear
Panel maker
LG Display
Launch price
—
Amazon price
$600
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
—
Pixel density
109 PPI
Brightness
275 nits
Contrast
1500000:1
Display area
95.34 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
—
Local dimming
No

Motion

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

Connectivity

Inputs
2 x USB 3.0 (Type-A; downstream), 1 x USB 3.1 (Type-C; upstream; 65W; DP Alt Mode), 2 x HDMI 2.1, 1 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
75.8
Work
64.3
Play
89.7
Quality / price
25.3
Work / price
21.4
Play / price
20.9

Additional information

Features
4-Side Virtually Borderless Design, AMD FreeSync Premium Pro, Auto Input Switch, Black Stabilizer, Color Calibrated, Color Weakness Mode, Crosshair, Dual Controller, Dynamic Action Sync, FPS Counter, HDR Effect, LG Switch, NVIDIA G-Sync Compatible, Picture-by-Picture, Picture-in-Picture, Picture Mode, Reader Mode, RGB Hexagon LED Lighting, Smart Energy Saving, User Define Key, VESA AdaptiveSync Display 240
Display extras
AGLR - anti-glare low reflection coating
Accessories
DisplayPort cable, HDMI cable, USB Type-C cable
Amazon warranty
2 Year Manufacturer
Amazon dimensions
{'width': 30.9, 'height': 22.9, 'length': 11.5, 'weight': 22.9}

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 34GX900A on overall quality. Open the monitor table to sort, filter, and compare side by side.

LG 34GX90SA 33.9" · OLED · 3440×1440 · 240 Hz
75.4
88.9
21.5
$700
LG 27GX790A 26.5" · OLED · 2560×1440 · 480 Hz
75.5
87.8
30.2
$500
LG 34GX900A 33.9" · OLED · 3440×1440 · 240 Hz
75.8
89.7
23.8
$637
LG 27GS95QE 26.5" · OLED · 2560×1440 · 240 Hz
76.0
88.3
23.8
$639
LG 39GX90SA 38.5" · OLED · 3440×1440 · 240 Hz
76.7
90.2
14.2
$1080
LG 27GX700A 26.5" · OLED · 2560×1440 · 280 Hz
76.9
89.7
38.5
$400
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 Gaming Monitor that’s Ahead of the (800R) Curve - The 34” WQHD OLED with a steep 800R curve and up to 1300 nits (APL 1.5%) peak brightness pulls you deep into the action, while a 240Hz refresh rate and 0.03ms response time keep gameplay insanely fast and smooth.

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.

Ultimate Frame Sync: FreeSync Premium Pro & G-SYNC Compatible - Say goodbye to screen tearing and stutter. With AMD FreeSync Premium Pro 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 - UL-verified “Flicker-free Display”, “Discomfort Glare Free” and “Low Blue Light Hardware Solution Platinum”, this OLED display keeps your view crisp and colors bold. With advanced anti-glare tech minimizing reflections, you get distraction-free clarity—so you can stay focused and dominate in any lighting.

Unlock Your Potential with Advanced Gaming Features - 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.

Customize Your Screen View with the Switch App - The Switch app transforms your screen into a multitasking hub for work and gaming. Effortlessly split the screen into up to 6 sections, customize display layouts, or launch video calls with a single hotkey.

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