Monitors · 2025 · LG

LG UltraGear 45GX950A-B

The 45GX950A-B is a 44.5-inch, 21:9, 800R curved LG gaming monitor and one of the first OLED monitors with 5120 × 2160 resolution. Dual-Mode offers 165 Hz at 5K2K or 330 Hz at a lower resolution; it has DisplayPort 2.1 and a USB-C port delivering 90 W. Owners praise the picture, size and curve; slow wake from sleep, signal dropouts, instability over DisplayPort 2.1 and units failing early have been reported individually.

45GX950A-B: 44.5-inch 800R curved 5K2K (5120 × 2160) OLED, 165 Hz / Dual-Mode 330 Hz. The same-size 45GX950B (UltraGear evo) and the WQHD 45GX90SB-B are separate.

LG UltraGear 45GX950A-B — LG product image of the UltraGear 45GX950A-B.
LG product image of the UltraGear 45GX950A-B.

Specifications

SpecificationValue
Panel44.5-inch WOLED, 21:9, 800R curve; 5120 × 2160 (5K2K), 0.2035 mm pixel pitch (about 125 ppi); MLA+

800R means the screen curves along a circle with an 80 cm radius, so the edges sit closer to the eyes. MLA+ (micro lens array) directs OLED pixel light forward to raise brightness.

Refresh rate and response165 Hz at 5K2K; 330 Hz at WFHD with VESA-certified Dual-Mode; 0.03 ms (GtG)

Dual-Mode doubles the refresh rate by lowering the resolution: 330 Hz for fast competitive games, 5K2K at 165 Hz for detailed games.

Brightness and HDR275 cd/m² typical (minimum 250); HDR10, VESA DisplayHDR True Black 400; DCI-P3 98.5%; 10-bit; contrast 1,500,000:1 (typical)

DisplayHDR True Black 400 is VESA’s certification for screens that can turn black fully off, such as OLED, and requires 400 nits peak brightness.

SyncNVIDIA G-SYNC Compatible, AMD FreeSync Premium Pro, VRR

Variable refresh rate matches the monitor to the graphics card’s frame rate, reducing tearing and stutter.

Inputs2 × HDMI, 1 × DisplayPort 2.1 (DSC), 1 × USB-C (5120 × 2160 at 165 Hz, data, 90 W power); 2 × USB 3.0 downstream; 4-pole headphone/mic

DSC compresses the image visually losslessly so high resolution and refresh rate fit through one cable. USB-C gives a laptop video, data and 90 W charging over one cable. LG notes NVIDIA released a driver in April 2025 that fixed screen blackouts seen over DisplayPort.

PiP and PbPPIP and 2-source PBP

PiP shows one source in a small window, and PbP splits the screen to show two sources side by side, for example a computer and a game console at once.

Audio10 W × 2 stereo speakers, DTS Headphone:X
Stand and mountingTilt, height and swivel adjustment; 100 × 100 mm VESA mounting
PowerExternal adapter (20 V / 18 A); under 0.5 W in sleep
Size and weightWith stand 991.6 × 545.6–665.6 × 342 mm, 14 kg; without stand 991.6 × 460.7 × 225.5 mm, 9.4 kg

From the manufacturer

LG says the 45GX950A was the only OLED monitor with 5K2K resolution as of March 2025 and that MLA+ gives 37.5% brighter SDR than its previous models. LG UK

Owner experiences and issues

  • Owners most often praise the image quality, the large workspace, the 800R curve once they get used to it, and Dual-Mode. Criticisms include the matte surface dulling the image, color fringing on text and bright highlights in HDR staying lower than expected. Individually reported problems include waking slowly or not at all from sleep, the signal dropping when a game launches, instability and HDR trouble at 5K2K over DisplayPort 2.1 (mostly in spring 2025, before the NVIDIA driver fix LG mentions), refresh-rate flicker, a faulty speaker out of the box and units that stopped working entirely after a few weeks to three months (four owners). One owner complained about LG software pop-ups. These reports do not indicate a failure rate.

    The first 350 reviews on Best Buy Canada listing 19290023; most are syndicated from Best Buy US and LG websites, and 301 were collected as part of a promotion (incentivized).

    Best Buy Canada: LG UltraGear 45GX950A-B reviews

Tags

2025LGULTRAGEAROLEDULTRAWIDE5K2KGAMINGDUAL-MODE

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Sources

  1. LG UK: 45GX950A-B UltraGear OLED gaming monitor specifications
  2. Best Buy Canada: LG UltraGear 45GX950A-B reviews