LG UltraGear evo GX9 39GX950B-B / LG UltraGear OLED 27GR95QE-B

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

LG UltraGear OLED 27GR95QE-B: 27GR95QE-B: a 2023 26.5-inch (27-inch class) 1440p 240 Hz OLED gaming monitor. Its successor 27GS95QE-B and the 4K/1080p dual-mode 27GX790A-B are separate models.

SpecificationLG UltraGear evo GX9 39GX950B-BLG UltraGear OLED 27GR95QE-B
Release year20262023
Display38.86-inch OLED · 5120 × 2160 · 21:9 LG—
Curvature1500R LG—
Pixel pitch0.1776 × 0.1776 mm LG—
Refresh rate165 Hz (5120 × 2160) LG—
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 LGTypical 200 cd/m², minimum 160 cd/m²

These are full-screen SDR figures; small HDR highlights can be brighter. LG does not give a peak HDR figure in the spec table.

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		External adapter, AC 100–240 V; typical 74 W, maximum 94 W; under 0.5 W in sleep 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 LG—
Panel—26.5-inch (67.32 cm) OLED, 2560 × 1440 (16:9); 0.2292 mm pixel pitch; 1.07 billion colours

Because self-lit OLED pixels can switch fully off, blacks are true black; LG gives typical contrast as 1,500,000:1. 1.07 billion colours corresponds to 10-bit colour depth.

LG
Refresh rate and response time—240 Hz; 0.03 ms (GtG)

240 Hz shows 240 frames per second, making motion smoother and less blurred in fast games; this needs a graphics card producing 240 fps and a DisplayPort or HDMI 2.1 connection. GtG is the time a pixel takes to change from one grey level to another.

LG
Colour and HDR—98.5% DCI-P3 (typical), 90% (minimum); HDR10; factory calibrated; hardware calibration ready

Hardware calibration uses LG Calibration Studio and a compatible colorimeter to adjust the monitor’s own colour tables. No VESA DisplayHDR certification is listed.

LG
Adaptive sync and gaming—NVIDIA G-SYNC Compatible, AMD FreeSync Premium, VRR; Black Stabiliser, Dynamic Action Sync, crosshair, FPS counter

Adaptive sync matches the monitor’s refresh to the graphics card’s frame rate to reduce tearing and stutter. Dynamic Action Sync is meant to reduce input lag.

LG
Video inputs—2 × HDMI 2.1, 1 × DisplayPort 1.4 (DSC)

DSC (Display Stream Compression) uses visually lossless compression to fit a 1440p 240 Hz signal within DisplayPort 1.4 bandwidth. The HDMI 2.1 inputs support VRR on consoles. There is no USB-C video input.

LG
USB and audio—1 × USB 3.0 upstream, 2 × USB 3.0 downstream; 4-pole headphone output (sound + mic) with DTS Headphone:X; optical digital audio out (S/PDIF)

There are no built-in speakers. DTS Headphone:X gives virtual 3D audio over headphones.

LG
Stand and mounting—Tilt, height, swivel and pivot adjustment; VESA 100 × 100 LG
Lighting and remote—Hexagon Lighting on the back; remote control included LG
Size and weight—Without stand 604.4 × 350.6 × 45.3 mm, 5.05 kg; with stand 604.4 × 464.4–574.4 × 258 mm, 7.35 kg LG