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LG UltraGear OLED 34GX90SA-W 34" specifications and in-depth review

LG UltraGear OLED 34GX90SA-W 34"

Manufacturer: LG

The LG UltraGear OLED 34GX90SA-W is a 34-inch curved ultrawide gaming monitor built around an OLED panel that delivers a 1,500,000:1 contrast ratio and wide 178-degree viewing angles both horizontally and vertically. It carries a matte, anti-glare coating and supports color calibration at 10-bit depth, making it a capable option for users who need accurate, consistent output across long sessions.

Running at 240Hz with a 0.03ms response time, the display is compatible with both AMD FreeSync Premium and Nvidia G-Sync, offering flexible synchronization support. Connectivity includes two HDMI ports, one DisplayPort 1.4 output, a USB-C port, and three USB 2.0 ports. The monitor features built-in stereo speakers rated at 2x7W, supports picture-in-picture, and includes a fully adjustable stand with tilt, swivel, and portrait mode capability, as well as VESA mount compatibility. Operating power consumption is rated at 35W.

Pros
  • The 240Hz refresh rate combined with a 0.03ms response time makes the display highly responsive for fast-paced content
  • Support for both AMD FreeSync Premium and Nvidia G-Sync Compatible gives flexibility across different GPU setups
  • The stand offers tilt, swivel, and portrait mode adjustment, along with VESA mount support for alternative mounting options
  • A 1,500,000:1 contrast ratio and 10-bit color depth with color calibration support allow for precise and detailed image reproduction
  • Built-in stereo speakers rated at 2x7W and picture-in-picture support add practical versatility without requiring additional peripherals
  • The matte, anti-glare panel reduces reflections during use in varied lighting conditions
Cons
  • Typical brightness of 275 nits is relatively modest for a display of this size and type
  • There is no 3.5mm headset jack, which limits direct audio accessory connection
  • USB ports are limited to USB 2.0, which restricts data transfer speeds for connected peripherals
  • The absence of Ethernet and Wi-Fi means the monitor has no network connectivity options
  • The EU energy label of G indicates this is among the less energy-efficient classifications available
  • At 10,400g, the monitor is notably heavy, which may complicate repositioning or mounting
Who is this for?

This monitor is well-suited to users who engage in fast-paced gaming, where the 240Hz refresh rate and 0.03ms response time translate directly into a smoother and more responsive experience. The ultrawide 3440x1440 resolution paired with a curved panel also makes it a strong fit for users who work across multiple applications simultaneously, benefiting from the added horizontal screen real estate. Those who require accurate color output will appreciate the 10-bit depth and color calibration support, making it a reasonable choice for content creators who also use their setup for gaming.

Who is this NOT for?

Users who need high sustained brightness — such as those working in brightly lit rooms or requiring HDR-grade luminance — may find the 275 nits typical brightness insufficient for their environment. The absence of a 3.5mm audio jack and the limitation to USB 2.0 ports make it a poor fit for users who rely on wired audio accessories or need fast peripheral data transfer. Additionally, those looking for a compact or lightweight display that is easy to move or reposition will be challenged by the monitor's 10,400g weight and 784mm width.

Display:

Display type OLED/AMOLED
response time 0.03 ms
screen size 34"
resolution 3440 x 1440 px
pixel density 109 ppi
Adaptive synchronization AMD FreeSync Premium, Nvidia G-Sync Compatible
has anti-glare coating ✓
refresh rate 240Hz
maximum horizontal viewing angle 178º
maximum vertical viewing angle 178º
has a matte panel ✓
has a glossy panel ✕
has a touch screen ✕

The display uses an OLED/AMOLED panel measuring 34 inches with a resolution of 3440 x 1440 px and a pixel density of 109 ppi. It operates at a 240Hz refresh rate with an exceptionally low 0.03ms response time, and supports both AMD FreeSync Premium and Nvidia G-Sync Compatible adaptive synchronization. Viewing angles reach 178 degrees on both the horizontal and vertical axes, and the panel features a matte, anti-glare coating rather than a glossy finish. Touch input is not supported.

General info:

Type Gaming, Curved, Ultrawide
EU energy label G
supports total tilt ✓
Has a swivel stand ✓
Supports VESA mount ✓
height 358 mm
width 784 mm
thickness 167 mm
weight 10400 g
supports portrait mode ✓
volume 46872.224 cm³

This is a gaming, curved, ultrawide monitor with a fully adjustable stand that supports tilt, swivel, and portrait mode, along with VESA mount compatibility for those who prefer a third-party arm or wall mount. It measures 784 mm wide, 358 mm tall, and 167 mm thick, with a total weight of 10,400 g. The monitor carries an EU energy label of G.

Colors:

brightness (typical) 275 nits
supports color calibration ✓
bit depth 10-bit
contrast ratio 1500000:1

The monitor offers a contrast ratio of 1,500,000:1 alongside a typical brightness of 275 nits. Color output is handled at a 10-bit depth, and the display supports color calibration for users who need consistent, accurate color representation.

Connectivity:

HDMI ports 2
supports Thunderbolt ✕
DisplayPort outputs 1
DisplayPort version DisplayPort 1.4
has a socket for a 3.5 mm audio jack ✕
has a DVI connector ✕
USB ports 3
USB version 2
Has USB Type-C ✓
supports Ethernet ✕
supports Wi-Fi ✕
has AirPlay ✕
mini DisplayPort outputs 0
has a VGA connector ✕

The monitor includes two HDMI ports and one DisplayPort 1.4 output for video input, along with a USB-C port and three USB 2.0 ports for peripheral connectivity. There is no mini DisplayPort, DVI, or VGA connector, and the monitor does not support Thunderbolt, Ethernet, Wi-Fi, or AirPlay. A 3.5mm headset jack is also absent.

Power:

operating power consumption 35W

The monitor has an operating power consumption of 35W.

Features:

has PiP ✓
has stereo speakers ✓
has built-in smart TV ✕
audio output power 2 x 7W
has a remote control ✕
supports Dolby Digital ✕
supports Dolby Digital Plus ✕
has DTS Surround ✕
has an ambient light sensor ✕
has a front camera ✕

The monitor includes built-in stereo speakers rated at 2x7W and supports picture-in-picture (PiP). It does not have a remote control, ambient light sensor, or front camera, and there is no built-in smart TV functionality. Audio formats such as Dolby Digital, Dolby Digital Plus, and DTS Surround are not supported.

Final Verdict

The LG UltraGear OLED 34GX90SA-W is a well-defined ultrawide gaming monitor whose specifications are clearly oriented toward users who prioritize display responsiveness and image depth. Its 240Hz refresh rate, 0.03ms response time, and 1,500,000:1 contrast ratio form a technically coherent package for demanding gaming use, while 10-bit color depth and calibration support extend its relevance to users with color accuracy needs. Practical considerations such as a flexible stand, broad GPU compatibility, and built-in speakers add to its day-to-day usability, though the 275 nits brightness ceiling and USB 2.0 limitation are genuine constraints that will matter to some users. Overall, the 34GX90SA-W represents a focused and capable option for those whose primary use case aligns with what its display technology is built to deliver.