ASUS ROG Swift OLED PG34WCDN vs LG 39GX950B-B: Which Monitor Is Better?

ASUS

Tested using Methodology v2.1.2

Updated May 27, 2026 04:11 PM

This review is in Early access

See ASUS ROG Swift OLED PG34WCDN Review

LG.com

Size 34"

Panel Type OLED

Native Resolution 3440 x 1440

Max Refresh Rate 360 Hz

Sub-Type QD-OLED

Size 39"

Panel Type OLED

Native Resolution 5120 x 2160

Max Refresh Rate 330 Hz

Sub-Type WOLED

Recommended in 1 article:
Ultrawide

Our Verdict

ASUS ROG Swift OLED PG34WCDN

LG 39GX950B-B

Full comparison details regarding individual product score sets can be found in the section below

Variants

ROG Swift OLED PG34WCDN (34")

39GX950B-B (39")

Review

See LG 39GX950B-B Review

Check Price

34"

ROG Swift OLED PG34WCDN

ASUS

39"

39GX950B-B

LG.com

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B

Main Differences for

PC Gaming

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PC Gaming

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Full Comparison

PC Gaming

0.0

Console Gaming

0.0

Office

0.0

Editing

0.0

Brightness

0.0

Response Time

0.0

HDR Picture

0.0

SDR Picture

0.0

Color Accuracy

0.0

Design

Style

Design Picture

SAMPLE

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SAMPLE

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Curved

Locked

Curve Radius

Locked

Build Quality

N/A

Build Quality Picture

SAMPLE

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SAMPLE

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Ergonomics

N/A

Ergonomics Picture

SAMPLE

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SAMPLE

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Back Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Height Adjustment

Lock" (Lock cm)

Min Height To Top Of Panel

Lock" (Lock cm)

Tilt Range

Locked

Rotate Portrait/Landscape

Locked

Swivel Range

Locked

Wall Mount

Locked

Stand

Stand Picture

SAMPLE

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SAMPLE

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Thickness Picture

SAMPLE

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SAMPLE

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Base Width

Lock" (Lock cm)

Base Depth

Lock" (Lock cm)

Thickness (With Display)

Lock" (Lock cm)

Weight (With Display)

Lock lbs (Lock kg)

Display

Display Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Size

Lock"

Housing Width

Lock" (Lock cm)

Housing Height

Lock" (Lock cm)

Thickness (Without Stand)

Lock" (Lock cm)

Weight (Without Stand)

Lock lbs (Lock kg)

Borders Size (Bezels)

Lock" (Lock cm)

Controls

Controls Picture

SAMPLE

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SAMPLE

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In The Box

In The Box Picture

SAMPLE

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SAMPLE

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Power Supply

Locked

Picture Quality

Contrast

N/A

Checkerboard Picture

SAMPLE

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SAMPLE

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Native Contrast

Lock : 1

Contrast With Local Dimming

Lock : 1

Local Dimming

N/A

Local Dimming Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

Local Dimming

Locked

Backlight

Locked

SDR Brightness

N/A

Real Scene

Lock cd/m²

Peak 2% Window

Lock cd/m²

Peak 10% Window

Lock cd/m²

Peak 25% Window

Lock cd/m²

Peak 50% Window

Lock cd/m²

Peak 100% Window

Lock cd/m²

Sustained 2% Window

Lock cd/m²

Sustained 10% Window

Lock cd/m²

Sustained 25% Window

Lock cd/m²

Sustained 50% Window

Lock cd/m²

Sustained 100% Window

Lock cd/m²

Automatic Brightness Limiting (ABL)

Lock

Minimum Brightness

Lock cd/m²

HDR Brightness

N/A

EOTF

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

VESA DisplayHDR Certification

Locked

Real Scene

Lock cd/m²

Peak 2% Window

Lock cd/m²

Peak 10% Window

Lock cd/m²

Peak 25% Window

Lock cd/m²

Peak 50% Window

Lock cd/m²

Peak 100% Window

Lock cd/m²

Sustained 2% Window

Lock cd/m²

Sustained 10% Window

Lock cd/m²

Sustained 25% Window

Lock cd/m²

Sustained 50% Window

Lock cd/m²

Sustained 100% Window

Lock cd/m²

Automatic Brightness Limiting (ABL)

Lock

Gray Uniformity

N/A

50% Uniformity Picture

SAMPLE

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SAMPLE

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50% Std. Dev.

Lock%

50% DSE

Lock%

Black Uniformity

N/A

Native Black Uniformity Picture

SAMPLE

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SAMPLE

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Native Std. Dev.

Lock%

Black Uniformity Picture With Local Dimming

SAMPLE

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SAMPLE

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Std. Dev. w/ L.D.

N/A

Color Accuracy (Pre-Calibration)

N/A

Pre Calibration Picture

SAMPLE

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SAMPLE

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Pre Gamma Curve Picture

SAMPLE

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SAMPLE

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Pre Color Picture

SAMPLE

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SAMPLE

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Picture Mode

Locked

sRGB Gamut Area xy

Lock%

White Balance dE (Avg.)

Lock

Color Temperature (Avg.)

Lock K

Gamma (Avg.)

Lock

Color dE (Avg.)

Lock

Contrast Setting

Lock

RGB Settings

Locked

Gamma Setting

Locked

Brightness Setting

Lock

Measured Brightness

Lock cd/m²

Brightness Locked

Locked

Color Accuracy (Post-Calibration)

N/A

Post Calibration Picture

SAMPLE

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SAMPLE

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Post Gamma Curve Picture

SAMPLE

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SAMPLE

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Post Color Picture

SAMPLE

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SAMPLE

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Picture Mode

Locked

sRGB Gamut Area xy

Lock%

White Balance dE (Avg.)

Lock

Color Temperature (Avg.)

Lock K

Gamma (Avg.)

Lock

Color dE (Avg.)

Lock

Contrast Setting

Lock

RGB Settings

Locked

Gamma Setting

Locked

Brightness Setting

Lock

Measured Brightness

Lock cd/m²

ICC Profile

Download

SDR Color Gamut

N/A

sRGB Color Gamut Picture

SAMPLE

for pictures & test results

SAMPLE

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sRGB Coverage xy

Lock%

sRGB Picture Mode

Locked

Adobe RGB Color Gamut Picture

SAMPLE

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SAMPLE

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Adobe RGB Coverage xy

Lock%

Adobe RGB Picture Mode

Locked

HDR Color Gamut

N/A

Wide Color Gamut

Locked

DCI-P3 Color Gamut Picture

SAMPLE

for pictures & test results

SAMPLE

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DCI-P3 Coverage xy

Lock%

DCI-P3 Picture Mode

Locked

Rec. 2020 Color Gamut Picture

SAMPLE

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SAMPLE

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Rec. 2020 Coverage xy

Lock%

Rec. 2020 Picture Mode

Locked

HDR Color Volume

N/A

DCI-P3 Color Volume ITP Picture

SAMPLE

for pictures & test results

SAMPLE

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1,000 cd/m² DCI-P3 Coverage ICtCp

Lock%

DCI-P3 Picture Mode

Locked

Rec. 2020 Color Volume ITP Picture

SAMPLE

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SAMPLE

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10,000 cd/m² Rec. 2020 Coverage ICtCp

Lock%

Rec. 2020 Picture Mode

Locked

Viewing Angle

N/A

Viewing Angle Video

SAMPLE

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SAMPLE

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Chroma Graph

SAMPLE

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SAMPLE

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Color Washout From Left

Lock°

Color Washout From Right

Lock°

Hue Graph

SAMPLE

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SAMPLE

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Color Shift From Left

Lock°

Color Shift From Right

Lock°

Lightness Graph

SAMPLE

for pictures & test results

SAMPLE

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Brightness Loss From Left

Lock°

Brightness Loss From Right

Lock°

Black Level Raise From Left

Lock°

Black Level Raise From Right

Lock°

Gamma Shift From Left

Lock°

Gamma Shift From Right

Lock°

Text Clarity

N/A

ClearType On

SAMPLE

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SAMPLE

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ClearType Off

SAMPLE

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SAMPLE

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Panel Technology

Spectral Power Distribution

SAMPLE

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SAMPLE

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Pixels

SAMPLE

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SAMPLE

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Panel Type

Locked

Sub-Type

Locked

Subpixel Layout

Locked

Direct Reflections

N/A

Ring Light Picture

SAMPLE

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SAMPLE

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Direct Reflections Graph

SAMPLE

for pictures & test results

SAMPLE

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Peak Direct Reflection Intensity

Lock%

Screen Finish

Locked

Ambient Black Level Raise

N/A

Black Level Raise Picture

SAMPLE

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SAMPLE

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Ambient Black Level Raise Graph

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Black Luminance @ 0 lx

Lock cd/m²

Black Luminance @ 1000 lx

Lock cd/m²

Total Reflected Light

N/A

Bright Room Off Picture

SAMPLE

for pictures & test results

SAMPLE

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Total Reflection Ring Light Picture

SAMPLE

for pictures & test results

SAMPLE

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Total Reflected Light Intensity

Lock% ⋅ pixel

Diffraction Artifacts

Locked

Gradient

N/A

Gradient Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Color Depth

Lock Bit

Motion

Refresh Rate

N/A

Dual Mode Setting

Locked

Native Refresh Rate

Lock Hz

Max Refresh Rate

Lock Hz

Max Refresh Rate Over DP

Lock Hz

Max Refresh Rate Over HDMI

Lock Hz

Max Refresh Rate Over DP @ 10-bit

Lock Hz

Max Refresh Rate Over HDMI @ 10-Bit

Lock Hz

DSC Toggle

Locked

DSC Off Max Refresh Rate Over DP

Lock Hz

N/A

DSC Off Max Refresh Rate Over HDMI

Lock Hz

N/A

Variable Refresh Rate (VRR)

Variable Refresh Rate

Locked

FreeSync

Locked

G-SYNC

Locked

VRR Maximum

Lock Hz

VRR Minimum

Locked

VRR Supported Connectors

Locked

VRR Motion Performance

N/A

Pursuit Photo VRR

SAMPLE

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SAMPLE

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OD Mode CAD Comparison

SAMPLE

for pictures & test results

SAMPLE

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Recommended VRR OD Setting

Locked

Variable Overdrive Advertised

Locked

Avg. CAD

Lock

Best CAD

Lock

Worst CAD

Lock

Refresh Rate Compliance

N/A

Fast GTG Sequence

SAMPLE

for pictures & test results

SAMPLE

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VRR Compliance

SAMPLE

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SAMPLE

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Compliance @ Max Hz

Lock%

Compliance @ 120 FPS

Lock%

Compliance @ 60 FPS

Lock%

CAD @ Max Refresh Rate

N/A

Pursuit Photo At Max Refresh

SAMPLE

for pictures & test results

SAMPLE

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CAD Heatmap At Max Refresh

SAMPLE

for pictures & test results

SAMPLE

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OD Transition Max Refresh Rate

Join nowfor multiple image controls

Recommended Overdrive Setting

Locked

Avg. CAD

Lock

Best 10% CAD

Lock

Worst 10% CAD

Lock

Response Time @ Max Refresh Rate

First Response Time

Lock ms

Total Response Time

Lock ms

Recommended Overdrive Setting

Locked

RGB Overshoot

Lock RGB

Worst 10% RGB Overshoot

Lock RGB

Worst 10% First Response Time

Lock ms

Worst 10% Total Response Time

Lock ms

Heatmap First Response

SAMPLE

for pictures & test results

SAMPLE

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Heatmap Total Response

SAMPLE

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SAMPLE

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Heatmap RGB Overshoot

SAMPLE

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SAMPLE

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CAD @ 120Hz

N/A

Pursuit Photo 120Hz

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

CAD Heatmap 120Hz

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

OD Transition 120Hz

Join nowfor multiple image controls

Recommended Overdrive Setting

Locked

Avg. CAD

Lock

Best 10% CAD

Lock

Worst 10% CAD

Lock

Response Time @ 120Hz

Worst 10% First Response Time

Lock ms

RGB Overshoot

Lock RGB

Total Response Time

Lock ms

First Response Time

Lock ms

Recommended Overdrive Setting

Locked

Worst 10% Total Response Time

Lock ms

Worst 10% RGB Overshoot

Lock RGB

120Hz First Response Heatmap

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

120Hz Total Response Heatmap

SAMPLE

for pictures & test results

SAMPLE

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120Hz Heatmap RGB Overshoot

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

CAD @ 60Hz

N/A

Pursuit Photo 60Hz

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

CAD Heatmap 60Hz

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

OD Transition 60Hz

Join nowfor multiple image controls

Recommended Overdrive Setting

Locked

Avg. CAD

Lock

Best 10% CAD

Lock

Worst 10% CAD

Lock

Response Time @ 60Hz

Recommended Overdrive Setting

Locked

First Response Time

Lock ms

Total Response Time

Lock ms

RGB Overshoot

Lock RGB

Worst 10% Total Response Time

Lock ms

Worst 10% First Response Time

Lock ms

Worst 10% RGB Overshoot

Lock RGB

60Hz First Response Heatmap

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

60Hz Total Response Heatmap

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

60Hz RGB Overshoot Heatmap

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Backlight Strobing (BFI)

Backlight Strobing Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Backlight Strobing Frequency Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Backlight Strobing (BFI)

Locked

Maximum Frequency

Lock Hz

N/A

Minimum Frequency

Lock Hz

N/A

Longest Pulse Width Brightness

Lock cd/m²

N/A

Shortest Pulse Width Brightness

Lock cd/m²

N/A

Pulse Width Control

Locked

Pulse Phase Control

Locked

Pulse Amplitude Control

Locked

VRR At The Same Time

Locked

VRR Flicker

N/A

VRR Flicker Video

SAMPLE

for videos & test results

SAMPLE

for videos & test results

VRR Flicker Graph

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Dark Gray Flicker

Lock RGB

Middle Gray Flicker

Lock RGB

Light Gray Flicker

Lock RGB

VRR Flicker Control Setting

Locked

Image Flicker

N/A

Backlight Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Flicker-Free

Locked

PWM Dimming Frequency

Locked

Inputs

Input Lag

N/A

Native Resolution @ Max Hz

Lock ms

Native Resolution @ 120Hz

Lock ms

Native Resolution @ 60Hz

Lock ms

Backlight Strobing (BFI)

Lock ms

N/A

Resolution

N/A

Native Resolution

Locked

Aspect Ratio

Locked

Megapixels

Lock MP

Pixel Density

Lock PPI

PS5 Compatibility

N/A

PS5 Compatibility Photo

SAMPLE

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SAMPLE

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PS5 Compatibility Table

SAMPLE

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SAMPLE

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4k @ 120Hz

Locked

4k @ 60Hz

Locked

1440p @ 120Hz

Locked

1440p @ 60Hz

Locked

1080p @ 120Hz

Locked

1080p @ 60Hz

Locked

Xbox Series X|S Compatibility

N/A

XSX Compatibility Photo

SAMPLE

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SAMPLE

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XSX Compatibility Table

SAMPLE

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SAMPLE

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4k @ 120Hz

Locked

4k @ 60Hz

Locked

1440p @ 120Hz

Locked

1440p @ 60Hz

Locked

1080p @ 120Hz

Locked

1080p @ 60Hz

Locked

Inputs

Inputs 1

SAMPLE

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SAMPLE

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Inputs 2

SAMPLE

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SAMPLE

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DisplayPort

Locked

DisplayPort Transmission Bandwidth

Locked

Mini DisplayPort

Locked

HDMI

Locked

HDMI 2.1 Bandwidth

Locked

Daisy Chaining

Locked

3.5mm Audio Out

Locked

Ethernet

Locked

HDR10

Locked

Dolby Vision

Locked

USB

USB-A Ports

Locked

USB-A Rated Speed

Locked

USB-B Upstream Port

Locked

USB-C Ports

Locked

USB-C Upstream

Locked

USB-C Rated Speed

Locked

USB-C Power Delivery

Locked

USB-C DisplayPort Alt Mode

Locked

Thunderbolt

Locked

macOS Compatibility

macOS Screenshot

SAMPLE

for pictures & test results

SAMPLE

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Features

Additional Features

Speakers

Locked

RGB Illumination

Locked

Multiple Input Display

Locked

KVM Switch

Locked

Smart OS

Locked

On-Screen Display (OSD)

OSD Picture

SAMPLE

for pictures & test results

SAMPLE

for pictures & test results

Check Price

34"

ROG Swift OLED PG34WCDN

ASUS

39"

39GX950B-B

LG.com

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B

34"

ROG Swift OLED PG34WCDN

39"

39GX950B-B