Display
34.18 in, QD-OLED, 3440 x 1440 pixels
34.18
Refresh Rate
48 Hz - 175 Hz
48 Hz
Brightness
250 cd/m²
250 cd
Contrast Ratio
1500000 : 1
1500000
Overview
Built around a QD-OLED panel, the ASUS ROG Strix OLED XG34WCDG runs at 3440 x 1440 pixels with a 48 Hz - 175 Hz refresh range. Motion handling is rated at 0.03 ms GtG. Colour and light output come in at 250 cd/m² typical brightness, 1500000 : 1 contrast and 99.3 % DCI-P3 coverage. For adaptive sync, it supports FreeSync, G-Sync, VESA AdaptiveSync Display 175Hz. Ports include 2x HDMI 2.1, 1x DisplayPort 1.4, 3x USB-A.
BrandASUSPanel TypeQD-OLEDResolution3440 x 1440 pixelsRefresh Rate48 Hz - 175 Hz
Key Highlights
- QD-OLED panel at 3440 x 1440 pixels
- 48 Hz - 175 Hz refresh range
- 0.03 ms GtG response time
- 1500000 : 1 contrast ratio
- 250 cd/m² typical brightness
- 99.3 % DCI-P3 colour coverage
- FreeSync, G-Sync, VESA AdaptiveSync Display 175Hz
- Connectivity: 2x HDMI 2.1, 1x DisplayPort 1.4, 3x USB-A
Who Should Buy the Asus ROG Strix OLED XG34WCDG
+ Best For
Ultrawide game players
3440 x 1440 gives more horizontal view than 16:9
Dark-room users
self-emissive pixels and a 1,500,000:1 claim favour black-level depth
Mixed-GPU households
Radeon and GeForce adaptive-sync support are listed
Desk users wanting adjustment
110 mm height and ±25° swivel are included
× Not Ideal For
Colour-critical buyers
the 20% DCI-P3 entry is not trustworthy
Laptop docking users
USB-C power is limited to 15 W
Speaker-dependent setups
no built-in speakers are listed
Buyers needing a fully documented port map
the supplied Ports line is truncated
Display Performance
Refresh Rate
48 Hz - 175 Hz
High-refresh gaming range
Response Time
0.03 ms GtG
Manufacturer-published transition time
Brightness
250 cd/m²
Typical brightness as specified; peak figure not published
Contrast
1500000 : 1
Standard panel black depth
Colour Gamut
99.3 % DCI-P3
Wide-gamut coverage is listed
Gaming Performance
Refresh Rate48 Hz - 175 HzHigh ceiling supports competitive frame rates
Response Time0.03 ms (GtG)Published claim without independent testing
VRR / Adaptive SyncFreeSync, G-Sync, VESA AdaptiveSync Display 175HzHelps reduce tearing on compatible GPUs
GPU Requirement3440 x 1440 pixels up to 175 HzMid-to-high-end GPU recommended to approach the refresh ceiling
HDR & Brightness Reality
The HDR hardware is credible in one important respect: QD-OLED pixels can switch off individually, and DisplayHDR 400 True Black recognises that black-level advantage. The sheet also claims 1000 cd/m² peak brightness, but typical output is 250 cd/m², so large bright scenes will be much dimmer than small highlights. HDR10 is supported. The separate 20% DCI-P3 entry is implausible and prevents a trustworthy judgement about published gamut coverage.
Connectivity & Ports
HDMI2x HDMI 2.1Published port count and version
DisplayPort1x DisplayPort 1.4Input includes Display Stream Compression (DSC)
USB-CNot publishedNo one-cable laptop or charging function
USB Hub3x USB-A downstreamPeripherals can run through the screen
Audio Out3.5 mm audio out / headphone outExternal audio may still be preferred
Desk Fit & Ergonomics
Size / Footprint812 mm x 435 mm x 199 mm (W x H x D)Check desk width and depth before purchase
StandRemovable: YesA separate arm can replace the supplied base
VESA Mount100 x 100 mmUse a matching arm or wall mount
Tilt-5 ° to +20 ° / 1/4" Tripod SocketCovers the published forward and backward range
Height Adjust110 mm (4.33 in)Supports eye-level positioning
Swivel / Pivot±25 ° / No pivotSupports shared angles and portrait rotation
Real-World Use Cases
175 Hz, 0.03 ms GtG and adaptive sync cover fast play
OLED black levels suit shadow-heavy scenes
3440 x 1440 provides more horizontal workspace than 16:9
100 x 100 mm VESA support can replace the supplied stand
Pros & Cons
Pros
- 48 Hz 175 Hz refresh range with 0.03 ms GtG response handles fast motion smoothly
- 1500000 : 1 contrast delivers near-infinite black depth
- FreeSync, G-Sync, VESA AdaptiveSync Display 175Hz give broad adaptive-sync compatibility
- 99.3 % DCI-P3 coverage wide-gamut coverage suits colour-critical work
- Built-in USB hub adds convenient peripheral connectivity
- Stand offers 110 mm (4.33 in) height adjustment, swivel
- Backed by 3 years
- 109 ppi / 42 ppcm keeps text and UI edges crisp at normal desk distance
- OLED per-pixel dimming gives true blacks and instant pixel response
- KVM switch lets one keyboard/mouse control two connected PCs
- 100 x 100 mm VESA mount compatibility works with third-party arms and stands
- Low blue light and/or flicker-free modes support longer viewing comfort
- 3 combined HDMI/DisplayPort inputs support multiple sources
Cons
- No listed built-in speakers
- No energy-efficiency certification (e.g. ENERGY STAR, TCO) is listed
- HDCP support isn’t explicitly confirmed for protected 4K/HDR streaming
Score & Ratings
8/10
Great
Model Information
13
| Specification | Value |
|---|---|
| Brand | ASUS |
| Series | ROG Strix |
| Model | ROG Strix OLED XG34WCDG |
| Full Product Name | ASUS ROG Strix OLED XG34WCDG |
| Model Year | 2025 |
| Monitor Type | Gaming Monitor |
| Market Position | Upper-Mid to High-End Gaming |
| Primary Use | Competitive & Immersive Gaming |
| Launch Status | 2025 |
| Available Colors | Black |
| Warranty | 3 years (36 months) standard limited warranty from date of purchase |
| Panel Warranty | 3 years |
| Burn-In Warranty | 3 years (36 months) OLED panel burn-in coverage on most models |
Display & Panel
16
| Specification | Value | What It Means |
|---|---|---|
| Screen Size | 34.18 in | |
| Exact Diagonal | 868.162 mm (34.18 in) | |
| Radius of Curvature | 1800 mm (70.87 in) | |
| Aspect Ratio | 2.389:1 | |
| Active Display Width | 800.06 mm (31.50 in) | |
| Active Display Height | 337.06 mm (13.27 in) | |
| Display Area | 87.4 % | |
| Panel Type | QD-OLED | QD-OLED affects viewing angles, black depth and color consistency — each panel technology trades these off differently. |
| Panel Technology | OLED | |
| Panel Manufacturer | Samsung | |
| OLED Technology | QD-OLED | |
| Backlight Type | Self-emissive (no backlight — OLED) | |
| Self-Emissive Display | Yes | |
| Quantum Dot | Yes | |
| 3D Support | No | |
| Screen Coating | Anti-glare/Matte |
Resolution & Pixel Details
3
| Specification | Value | What It Means |
|---|---|---|
| Native Resolution | 3440 x 1440 pixels | |
| Pixel Density | 109 ppi / 42 ppcm | 109 ppi / 42 ppcm indicates how much scaling may be needed in the operating system for comfortable reading. |
| Pixel Pitch | 0.232 mm (0.01 in) |
Picture Quality & Color
13
| Specification | Value | What It Means |
|---|---|---|
| Panel Bit Depth | 10 bits | |
| FRC | No | |
| Display Colors | 1073741824 colors / 30 bits | |
| Typical Brightness | 250 cd/m² | |
| Peak Brightness | 1000 cd/m² | |
| Static Contrast Ratio | 1500000 : 1 | |
| Horizontal Viewing Angle | 178 ° | |
| Vertical Viewing Angle | 178 ° | |
| HDR Support | DisplayHDR 400 True BlackHDR10 |
|
| HDR10 | Yes | |
| Global Dimming | Yes | |
| DCI-P3 Coverage | 99.3 % | 99.3 % indicates how much of that color space the panel can reproduce, which affects color accuracy for photo/video work. |
| Color Adjustment | Yes |
Refresh Rate, Response & Gaming
13
| Specification | Value |
|---|---|
| Native Refresh Rate | 175 Hz |
| Refresh Rate Range | 48 Hz - 175 Hz |
| Minimum Response Time | 0.03 ms |
| Adaptive-Sync | Yes |
| AMD FreeSync | Yes |
| NVIDIA G-Sync | Yes |
| Motion Blur Reduction | Yes |
| Shadow Boost | Yes |
| Crosshair | Yes |
| Dynamic Crosshair | Yes |
| AI Gaming Features | Yes |
| GameVisual | Yes |
| Picture-by-Picture | Yes |
Ports & Connectivity
14
| Specification | Value |
|---|---|
| HDMI Ports | 2 |
| HDMI Version | 2.1 |
| HDMI Bandwidth | 24 kHz - 280 kHz |
| DisplayPort Input | 1 |
| DisplayPort Version | 1.4 |
| USB-C Video Input | Yes |
| DisplayPort Alt Mode | Yes |
| Display Stream Compression | Yes |
| USB-C Data Speed | 5 Gbps (USB 3.2 Gen 1) |
| USB-C Power Delivery | 15 W |
| USB-A Ports | 3 |
| KVM Switch | Yes |
| Audio Output | 3.5 mm |
| Headphone Output | 3.5 mm Audio Out |
Audio, Camera, Network & Smart Features
1
| Specification | Value |
|---|---|
| Built-In Camera | No |
Ergonomics & Stand
14
| Specification | Value | What It Means |
|---|---|---|
| VESA Mount | Yes | |
| VESA Size | 100 x 100 mm | |
| Removable Stand | Yes | |
| Height Adjustment | Yes | 110 mm (4.33 in) of travel allows the screen to be raised or lowered for a comfortable eye-level position. |
| Height Adjustment Range | 110 mm (4.33 in) | |
| Tilt Adjustment | Yes | |
| Forward Tilt | 5 ° | |
| Backward Tilt | 20 ° / 1/4" Tripod Socket | |
| Swivel Adjustment | Yes | |
| Left Swivel | 25 ° | |
| Right Swivel | 25 ° | |
| Portrait Mode | No | |
| Security Lock | Yes | |
| Anti-Theft Lock | Kensington Lock |
Dimensions, Weight & Design
6
| Specification | Value |
|---|---|
| Dimensions With Stand | 812 mm x 435 mm x 199 mm (W x H x D) |
| Dimensions Without Stand | 812 mm x 380 mm x 108 mm (W x H x D) |
| Weight With Stand | 8.3 kg (18.3 lbs) |
| Weight Without Stand | 6.2 kg (13.67 lbs) |
| Stand Depth | 199 mm (7.83 in) |
| RGB Lighting | Yes |
Power & Operating Conditions
13
| Specification | Value |
|---|---|
| Power Input | 100–240V |
| 110V Input Range | 100 V - 120 V |
| 220V Input Range | 220 V - 240 V |
| AC Frequency | 50 Hz - 60 Hz |
| Average Power Consumption | 36 W |
| Sleep Consumption | 0.5 W |
| Off Consumption | 0.3 W |
| Operating Temperature | 0 °C - 40 °C / 32 °F - 104 °F |
| Operating Humidity | 20 % - 80 % |
| Operating Altitude | 3658 m / 12001.3 ft |
| Storage Temperature | -20 °C - 60 °C / -4 °F - 140 °F |
| Storage Humidity | 20 % - 80 % |
| Storage Altitude | 12192 m / 40000 ft |
Eye Care, Protection & Additional Features
17
| Specification | Value |
|---|---|
| Flicker-Free | Yes |
| Low Blue Light | Yes |
| Proximity Sensor | Yes |
| OLED Protection | Yes |
| OLED Care | Yes |
| Pixel Refresh | Yes |
| Static Logo Detection | Yes |
| Screen Saver | Yes |
| Burn-In Protection | Yes (ASUS OLED Care / OLED Care Pro) |
| Thermal Management | Yes |
| Custom Heatsink | Yes |
| Desktop Control Software | Yes |
| Monitor Management Software | Yes |
| Screen Split | Yes |
| Aura Sync | Yes |
| Anti-Theft Slot | Yes (Kensington lock slot) |
| Additional Monitor Features | AI Visual; Aspect Ratio Control; Asus DisplayWidget Center; Asus Power Sync; Asus Virtual Screen; Aura Sync Lighting Effect; Boundary Detection; Custom Heatsink; GamePlus; GameVisual; Global Dimming Control; Logo Brightness Adjustment; Neo Proximity Sensor; Outer Dimming Control; Pixel Cleaning; ROG Gaming A.I technology; Screen Move; Screen Saver; Target Mode; Taskbar Detection; Trace Free Technology; Uniform Brightness |
Certifications, Standards & Licenses
4
| Specification | Value |
|---|---|
| TÜV Flicker-Free | Yes |
| TÜV Low Blue Light | Yes |
| VESA DisplayHDR | DisplayHDR 400 True Black |
| VESA AdaptiveSync | Display 175Hz |
Included Accessories
2
| Specification | Value |
|---|---|
| DisplayPort Cable | DisplayPort cable |
| USB Upstream Cable | USB Type-B to A cable |
Packaging Information
5
| Specification | Value |
|---|---|
| Package Dimensions | 930 mm x 515 mm x 224 mm (W x H x D) |
| Package Width | 930 mm (36.61 in) |
| Package Height | 515 mm (20.28 in) |
| Package Depth | 224 mm (8.82 in) |
| Package Weight | 11.4 kg (25.13 lbs) |
Frequently Asked Questions
01 Why should the XG34WCDG’s 20% DCI-P3 figure be rejected? +
A 20% result would be abnormally narrow and conflicts with the expected behaviour of a QD-OLED panel. It is best treated as a sheet error until Asus publishes a reliable value.
02 How different are the 250 and 1000 cd/m² brightness figures in practice? +
The 250 cd/m² number is the stated typical output, while 1000 cd/m² is a peak likely reserved for small HDR highlights. The sheet does not publish the test-window size or duration.
03 What limits the USB-C connection on this ultrawide? +
It carries DisplayPort Alt Mode and USB data but supplies only 15 W. That is useful for small devices and light charging, not for replacing most laptop power adapters.
04 Why are the HDMI and DisplayPort details missing from this entry? +
The supplied Ports text is cut off after the USB entries. Filling in the remaining connectors from assumption would risk assigning the wrong specification.
05 Who should avoid a 34.18-inch 1800R screen? +
Users who prefer flat 16:9 panels or need portrait rotation may find it unsuitable. The stand swivels and adjusts by 110 mm, but pivot is not supported.
Reviews
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № ROG STRIX OLED XG34WCDG