Display
34.18 in, QD-OLED, 3440 x 1440 pixels
34.18
Refresh Rate
48 Hz - 240 Hz
48 Hz
Brightness
250 cd/m²
250 cd
Contrast Ratio
1500000 : 1
1500000
Overview
The ASUS ROG Strix OLED XG34WCDMTG is a 3440 x 1440 pixels QD-OLED monitor rated for a 48 Hz - 240 Hz refresh range. On the response-time front, it’s specified at 0.03 ms GtG. Tearing is addressed through FreeSync, G-Sync, VESA AdaptiveSync Display 240Hz. On the picture-quality side, it’s specified at 250 cd/m² typical brightness, 1500000 : 1 contrast and 99 % DCI-P3 coverage. For hookups, there’s 2x HDMI 2.1, 1x DisplayPort 1.4, 2x USB-A.
BrandASUSPanel TypeQD-OLEDResolution3440 x 1440 pixelsRefresh Rate48 Hz - 240 Hz
Key Highlights
- QD-OLED panel at 3440 x 1440 pixels
- 48 Hz - 240 Hz refresh range — built for competitive, fast-paced gaming
- 0.03 ms GtG response time
- 1500000 : 1 contrast ratio
- 250 cd/m² typical brightness
- 99 % DCI-P3 colour coverage
- FreeSync, G-Sync, VESA AdaptiveSync Display 240Hz
- Connectivity: 2x HDMI 2.1, 1x DisplayPort 1.4, 2x USB-A
Who Should Buy the Asus ROG Strix OLED XG34WCDMTG
+ Best For
Ultrawide PC gamers
3440 x 1440 and 240 Hz provide a wide, fast gaming format
OLED fans
self-emissive pixels and a 1,500,000:1 claimed contrast ratio favour dark scenes
Single-cable laptop users
USB-C carries DisplayPort Alt Mode and up to 90 W power
Mixed gaming and media use
HDR10, Dolby Vision and built-in 2 x 5 W speakers are listed
× Not Ideal For
16:9 purists
the 34.18-inch ultrawide shape is not a standard widescreen format
Bright-room office users
typical brightness is listed at 250 cd/m²
Portrait-layout users
the stand has no pivot function
Buyers needing fully verified smart features
Google TV and Wi-Fi appear on the sheet but look inconsistent with the monitor category
Display Performance
Refresh Rate
48 Hz - 240 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 % DCI-P3
Wide-gamut coverage is listed
Gaming Performance
Refresh Rate48 Hz - 240 HzHigh ceiling supports competitive frame rates
Response Time0.03 ms (GtG)Published claim without independent testing
VRR / Adaptive SyncFreeSync, G-Sync, VESA AdaptiveSync Display 240HzHelps reduce tearing on compatible GPUs
GPU Requirement3440 x 1440 pixels up to 240 HzHigh refresh ceiling needs a high-end GPU to fully utilise
HDR & Brightness Reality
This is more credible HDR hardware than a basic DisplayHDR 400 LCD. The QD-OLED panel is self-emissive, the sheet claims 1,000 cd/m² peak brightness, and DisplayHDR 400 True Black is paired with HDR10 and Dolby Vision. However, typical brightness is only 250 cd/m², so sustained bright scenes may look far less forceful than small highlights. The figures are specifications, not measured results, and the unusual Google TV entry makes verification sensible.
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 Hub2x 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 / Footprint811.7 mm x 435.2 mm x 199.2 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
240 Hz, 0.03 ms GtG and broad adaptive sync target fast play
QD-OLED contrast, 1800R curvature and 99% DCI-P3 suit dark, colourful scenes
one cable can carry display data and up to 90 W power
Dolby Vision, HDR10, 10 W speakers and Dolby Atmos are listed, though the smart-TV data needs checking
Pros & Cons
Pros
- 48 Hz 240 Hz refresh range with 0.03 ms GtG response is built for competitive, fast-paced gaming
- 1500000 : 1 contrast delivers near-infinite black depth
- FreeSync, G-Sync, VESA AdaptiveSync Display 240Hz give broad adaptive-sync compatibility
- 99 % 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
- Built-in speakers mean audio works without extra cables
- 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 energy-efficiency certification (e.g. ENERGY STAR, TCO) is listed
- HDCP support isn’t explicitly confirmed for protected 4K/HDR streaming
Score & Ratings
9.2/10
Great
Model Information
13
| Specification | Value |
|---|---|
| Brand | ASUS |
| Series | ROG Strix |
| Model | ROG Strix OLED XG34WCDMTG |
| Full Product Name | ASUS ROG Strix OLED XG34WCDMTG |
| 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 | 92.9 % | |
| 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
14
| 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 BlackDolby VisionHDR10 |
|
| HDR10 | Yes | |
| Dolby Vision | Yes | |
| Global Dimming | Yes | |
| DCI-P3 Coverage | 99 % | 99 % 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
14
| Specification | Value |
|---|---|
| Native Refresh Rate | 240 Hz |
| Refresh Rate Range | 48 Hz - 240 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 |
| GameFast Input | Yes |
| GameVisual | Yes |
| Picture-by-Picture | Yes |
Ports & Connectivity
13
| Specification | Value |
|---|---|
| HDMI Ports | 2 |
| HDMI Version | 2.1 |
| 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 | 90 W |
| USB-A Ports | 2 |
| KVM Switch | Yes |
| Audio Output | 3.5 mm |
| Headphone Output | 3.5 mm Audio Out |
Audio, Camera, Network & Smart Features
5
| Specification | Value |
|---|---|
| Built-In Speakers | 2 x 5 W / Dolby Atmos |
| Built-In Camera | No |
| Operating System | Google TV (Android 14) |
| LAN | Wi-Fi / 802.11a (IEEE 802.11a-1999) / 802.11b (IEEE 802.11b-1999) / 802.11g (IEEE 802.11g-2003) / 802.11n (IEEE 802.11n-2009) / 802.11n 5GHz / 802.11ac (IEEE 802.11ac) / 802.11ax (IEEE 802.11ax, Wi-Fi 6) / Wi-Fi Direct |
| Multi-View | Yes |
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 | 811.7 mm x 435.2 mm x 199.2 mm (W x H x D) |
| Dimensions Without Stand | 811.7 mm x 357.6 mm x 108.4 mm (W x H x D) |
| Weight With Stand | 8.8 kg (19.4 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 | 41.5 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 | A.I. Assistant Technology; Aspect Ratio Control; Asus DisplayWidget Center; Asus Power Sync; Asus Virtual Screen; Aura Sync Lighting Effect; Boundary Detection; Custom Heatsink; GameFast Input; GamePlus; GameVisual; Global Dimming Control; Logo Brightness Adjustment; Motion Sync; MultiScreen with Cross Share app; Neo Proximity Sensor; NVIDIA GeForce NOW Pre-Installed; 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 240Hz |
Included Accessories
2
| Specification | Value |
|---|---|
| HDMI Cable | HDMI cable |
| DisplayPort Cable | DisplayPort 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 | 11.9 kg (26.24 lbs) |
Frequently Asked Questions
01 The USB-C port supplies 90 W — what can it replace? +
It can carry DisplayPort Alt Mode, USB data and up to 90 W power through one cable. That may replace a separate charger for compatible laptops, but the laptop's own power requirement still matters.
02 Why are Google TV and Wi-Fi listed on an ROG ultrawide monitor? +
Those entries are unusual for this product category and may be sheet contamination or an unverified regional feature. They should not be treated as confirmed without checking Asus documentation for the exact model.
03 How should the 250 cd/m² typical and 1000 cd/m² peak figures be read? +
The 250 cd/m² figure describes normal brightness, while 1000 cd/m² is a claimed peak that is likely limited to HDR highlights. The sheet does not state the test window or duration for that peak.
04 Is the 1800R curve aggressive on a 34.18-inch screen? +
The 1800 mm curvature is moderate rather than extremely tight. It is intended to keep the edges of the 811.7 mm-wide panel angled towards the viewer.
05 What is the main compromise behind the strong OLED gaming specification? +
Typical brightness is modest at 250 cd/m², there is no pivot, and the smart-feature data looks questionable. Buyers should also remember that the sheet provides no independent evidence for sustained brightness or response behaviour.
Reviews
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № ROG STRIX OLED XG34WCDMTG