LG UltraGear 45GX950A-B / MSI MPG 271QR QD-OLED X50

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 271QR QD-OLED X50: 3CF4 · 9S6-3CF49T-001, black, 26.5-inch

SpecificationLG UltraGear 45GX950A-BMSI MPG 271QR QD-OLED X50
Release year20252025
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		26.5-inch flat QD-OLED 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		—
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		—
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 LG—
PowerExternal adapter (20 V / 18 A); under 0.5 W in sleep LGInternal power board; 100–240 V, 50/60 Hz MSI
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 LG—
Release year—2025 MSI
Active area—590.42 × 333.72 mm MSI
Resolution and aspect ratio—2560 × 1440; 16:9 MSI
Refresh rate—Up to 500 Hz MSI
Variable refresh range—48–500 Hz MSI
Synchronization—G-SYNC Compatible; AMD FreeSync Premium Pro MSI
Response time—Claimed 0.03 ms GtG; not input lag MSI
SDR brightness—300 nits typical MSI
HDR brightness—True Black 500: 515 nits at 10% APL; Peak 1000: 1000 nits typical at 3% APL MSI
HDR certification—VESA DisplayHDR True Black 500 MSI
Color depth—10-bit; 1.07 billion colors MSI
DCI-P3—Claimed 99% coverage MSI
Surface—Anti-reflection coating MSI
DisplayPort—1 × DP 2.1a UHBR20 MSI
HDMI—2 × HDMI 2.1; 1440p 500 Hz support MSI
USB-C—DisplayPort Alt Mode and USB Power Delivery MSI
USB hub—2 × USB-A 5 Gbit/s; 1 × USB-B 5 Gbit/s upstream MSI
KVM—Switch one keyboard/mouse between computers MSI
Multiple sources—PIP / PBP MSI
Headphones—Headphone output MSI
Panel care—OLED Care 3.0; pixel shift and panel protection MSI
Presence sensor—AI Care Sensor; monitor or system control mode MSI
Height—110 mm adjustment MSI
Tilt and rotation—−5°–20° tilt; ±30° swivel, ±90° pivot MSI
VESA—100 × 100 mm MSI
Dimensions with stand—609.3 × 241.9 × 416.1 mm (W × D × H) MSI
Net weight—8.4 kg MSI