LG UltraGear evo GX9 39GX950B-B / MSI MAG 271QPX QD-OLED E2

LG UltraGear evo GX9 39GX950B-B: 39GX950B-B · 38.86-inch · 5K2K · black

MSI MAG 271QPX QD-OLED E2: 26.5-inch flat MAG 271QPX QD-OLED E2, black (9S6-3CD89T). The original 360 Hz MAG 271QPX QD-OLED and the MPG 271QRX are different models.

SpecificationLG UltraGear evo GX9 39GX950B-BMSI MAG 271QPX QD-OLED E2
Release year20262024
Display38.86-inch OLED · 5120 × 2160 · 21:9 LG—
Curvature1500R LG—
Pixel pitch0.1776 × 0.1776 mm LG—
Refresh rate165 Hz (5120 × 2160) LG240 Hz; Adaptive-Sync 48–240 Hz; 2560 × 1440 at 240 Hz over DisplayPort 1.4a, both HDMI 2.1 ports and USB-C (DP Alt)

240 Hz shows 240 frames per second for smooth, clear motion in fast games, provided the graphics card can produce that frame rate. Adaptive-Sync matches the display’s refresh to the card’s frame rate to prevent tearing.

MSI
Dual-Mode330 Hz at 2560 × 1080 in the 21:9 modes; 330 Hz at 1920 × 1080 in the 16:9 modes

The product page calls this mode QHD in one place and WFHD in another; the resolutions in the manual were used. Exit the game before changing the mode.

LG		—
Pixel response0.03 ms GtG

Not total input lag.

LG		—
Brightness335 nits typical; 300 nits minimum LG—
Peak HDR brightness1500 nits

Peak figure LG states under internal test conditions; not sustained full-screen brightness.

LG		—
HDR formatsHDR10; VESA DisplayHDR True Black 500; no Dolby Vision LG—
Colour coverageDCI-P3 99.5% typical, 94% minimum (CIE1976); 1.07 billion colours LG—
Contrast ratio1,850,000:1 typical; 1,480,000:1 minimum

Manufacturer figure.

LG		—
SurfaceAnti-glare, low-reflection front polarizer LG—
CalibrationFactory calibrated; hardware-calibration ready (LG Calibration Studio) LG—
Variable refreshG-SYNC Compatible; FreeSync Premium Pro LG—
DisplayPort1 × DisplayPort 2.1; UHBR20

The graphics card and cable must support this rate.

LG		—
HDMI2 × HDMI 2.1

The menu has 2.1(PC) and 2.1(AV) compatibility options. The product page connectivity table omits the HDMI count; the two inputs in the manual were used.

LG		—
USB-C input1 × USB-C; video, data and up to 90 W power

The manual lists DP Alternate Mode and Power Delivery. The port does not power the monitor; the adapter is required.

LG		—
USB hubUSB-C upstream; 2 × downstream USB 3.2 Gen 2

The manual says the downstream ports run at USB 2.0 over a USB-C to USB-C cable and USB 3.0 over a USB-C to USB-A cable.

LG		—
Multiple sources2 × PBP and PIP; no built-in KVM LG—
Audio2 × 7 W speakers; 4-pole headphone output; AI Sound LG—
StandTilt −8° / +15°; ±30° swivel; 110 mm height adjustment

The manual does not describe pivot rotation.

LG		—
Wall mount100 × 100 mm; 4 × M4 × L10 screws; optional LSW149 plate LG—
Dimensions921.4 × 605.4 × 322.8 mm with stand (up); 921.4 × 495.4 × 322.8 mm (down); 921.4 × 405.0 × 118.7 mm without stand

Width × height × depth.

LG		—
Weight10.7 kg with stand; 6.8 kg without LG—
PowerExternal adapter; 40.3 W on-mode in SDR, 45.9 W in HDR

On-mode power demand from the product information sheet.

LG		—
OLED careScreen saver; Image Cleaning of about 10 minutes

The manual states that prolonged use can cause permanent brightness reduction and image retention.

LG		—
LightingUnity Hexagon Lighting 2.0 on the back LG—
Warranty2 years; OLED panel included LG3 years including OLED burn-in

Terms may vary by country.

MSI
Panel—26.5-inch flat QD-OLED; 2560 × 1440 (WQHD), 16:9; anti-reflection surface

In QD-OLED, light from a blue OLED layer is converted to red and green by quantum dots; because each pixel emits its own light, blacks turn fully off.

MSI
Response time—0.03 ms (GtG)

This is grey-to-grey transition time; OLED’s very fast transitions reduce motion blur, but it is not the same as total input lag.

MSI
Brightness and HDR—SDR 250 nits (typical); HDR 450 nits at 10% window and 1000 nits peak at 3% window; VESA DisplayHDR True Black 400

OLED brightness falls as the lit area grows; 1000 nits appears only in very small bright highlights. True Black 400 certifies deep blacks with at least 400 nits HDR performance.

MSI
Colour—10-bit (1.07 billion colours); 99.1% DCI-P3 and 100% sRGB coverage (CIE 1976); ΔE ≤ 2

The wide gamut gives saturated colour in HDR and games; MSI states colour accuracy as ΔE ≤ 2.

MSI
Contrast and viewing angle—1,500,000:1 (typical); 178° / 178° MSI
Inputs—2 × HDMI 2.1 (HDCP 2.3), 1 × DisplayPort 1.4a, 1 × USB-C (DP Alt, 15 W PD), headphone out

The HDMI 2.1 inputs support WQHD 240 Hz on consoles at 48 Gbps (Console Mode). USB-C with 15 W only charges small devices such as phones and is not enough to charge a laptop; the port runs at USB 2.0 speed and there is no separate USB hub.

MSI
PiP / PbP—Picture-in-picture and picture-by-picture support

Shows two sources at once: in PiP one is a small window, in PbP the two sit side by side.

MSI
OLED care and cooling—MSI OLED Care 2.0; fanless design with graphene film and custom heatsink

OLED Care includes protection functions that reduce the risk of static images leaving marks (burn-in). With no fan, it makes no noise while running.

MSI
Stand and mounting—Tilt -5°/20°, swivel ±30°, height 0–110 mm, pivot ±90°; VESA 100 × 100 mm MSI
Power consumption—40 kWh/1000 h in on mode; standby 0.5 W; off 0.3 W; energy class G MSI
Size and weight—609 × 242 × 416 mm with stand; 609 × 72 × 362 mm without; 5.3 kg without stand MSI
In the box—DisplayPort cable, HDMI cable, power cord, quick guide MSI