LG UltraGear 45GX950A-B / MSI MPG 321URX QD-OLED

LG UltraGear 45GX950A-B: 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.

MSI MPG 321URX QD-OLED: MPG 321URX QD-OLED, black. The DisplayPort 2.1 MPG 322URX QD-OLED and the white MPG 321URXW are separate models.

SpecificationLG UltraGear 45GX950A-BMSI MPG 321URX QD-OLED
Release year20252024
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.

LG		31.5-inch flat QD-OLED; 3840 × 2160; 0.1814 mm pixel pitch; anti-reflection surface

QD-OLED converts blue OLED light to red and green with quantum dots; because each pixel makes its own light, blacks can switch fully off. 4K at 32 inches gives roughly 140 ppi.

MSI
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.

LG		—
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.

LG		250 nits typical; DisplayHDR True Black 400; 1,500,000:1 typical contrast

DisplayHDR True Black 400 is the VESA class for displays that can produce deep blacks such as OLED; it requires 400-nit small-area brightness and a very low black level. 250 nits is the full-screen SDR figure.

MSI
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.

LG		—
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.

LG		1 × DisplayPort 1.4a; 2 × HDMI 2.1; 1 × USB-C (DP Alt Mode, 90 W PD); 2 × USB 2.0 Type-A, 1 × USB 2.0 Type-B; headphone out

The USB-C input can carry video and charge a laptop at up to 90 W over a single cable. Display Ninja says the monitor has a built-in KVM; the USB-A ports run at USB 2.0 speed.

MSI
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.

LG		—
Audio10 W × 2 stereo speakers, DTS Headphone:X LG—
Stand and mountingTilt, height and swivel adjustment; 100 × 100 mm VESA mounting LGTilt −5/15°, swivel ±30°, pivot ±10°, 110 mm height adjustment; VESA 100 × 100 MSI
PowerExternal adapter (20 V / 18 A); under 0.5 W in sleep LG—
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 LGWith stand 718 × 242 × 483 mm; without stand 718 × 69 × 418 mm; 9.6 kg net MSI
Refresh and response—240 Hz (48–240 Hz variable range); 0.03 ms GtG

MSI says 240 Hz at 4K is reachable over DisplayPort 1.4a, HDMI 2.1 and USB-C alike. 0.03 ms is grey-to-grey transition time, not total input lag.

MSI
Colour—10-bit (1.07 billion colours); 99% DCI-P3, 97% Adobe RGB, 138% sRGB

138% sRGB means the gamut extends well beyond sRGB; use the monitor’s sRGB mode so sRGB content does not look oversaturated.

MSI
Adaptive sync—G-SYNC Compatible; AMD FreeSync Premium Pro

Adaptive sync matches the display refresh to the game’s frame rate to reduce tearing and stutter. FreeSync Premium Pro adds a low-latency requirement in HDR.

MSI
Warranty—3 years, including panel burn-in

On OLED panels, images left static for long periods can leave a permanent mark (burn-in); MSI covers this risk under warranty. Terms may vary by country.

MSI