Display
26.5 in, QD-OLED, 3840 x 2160 pixels / Ultra HD (UHD) / 4K / 2160p
26.5
Refresh Rate
48 Hz - 240 Hz
48 Hz
Brightness
-
Contrast Ratio
1500000 : 1
1500000
Overview
The ASUS ROG Strix OLED XG27UCDMG is a 3840 x 2160 pixels / Ultra HD (UHD) / 4K / 2160p 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 1500000 : 1 contrast and 145 % sRGB coverage. For hookups, there’s 2x HDMI 2.1, 1x DisplayPort 1.4, 3x USB-A.
BrandASUSPanel TypeQD-OLEDResolution3840 x 2160 pixels / Ultra HD (UHD) / 4K / 2160pRefresh Rate48 Hz - 240 Hz
Key Highlights
- QD-OLED panel at 3840 x 2160 pixels / Ultra HD (UHD) / 4K / 2160p
- 48 Hz - 240 Hz refresh range — built for competitive, fast-paced gaming
- 0.03 ms GtG response time
- 1500000 : 1 contrast ratio
- 145 % sRGB colour coverage
- FreeSync, G-Sync, VESA AdaptiveSync Display 240Hz
- Connectivity: 2x HDMI 2.1, 1x DisplayPort 1.4, 3x USB-A
- Stand: 120 mm (4.72 in) height travel, swivel, pivot
Who Should Buy the Asus ROG Strix OLED XG27UCDMG
+ Best For
High-end PC gamers
4K, 240 Hz and 0.03 ms GtG target powerful systems
OLED picture-quality buyers
self-emissive pixels and a 1,500,000:1 contrast claim favour dark scenes
USB-C laptop users
the Type-C connection provides display, data and up to 90 W power
Multi-device desks
two HDMI 2.1 inputs, DisplayPort and three USB Type-A ports are listed
× Not Ideal For
Speaker-dependent setups
no built-in speakers are included
Brightness-focused buyers
typical brightness is not published
Lower-powered gaming PCs
4K at up to 240 Hz is highly demanding
Users avoiding OLED care requirements
Asus OLED Care Pro is listed because the panel needs protection features
Display Performance
Refresh Rate
48 Hz - 240 Hz
High-refresh gaming range
Response Time
0.03 ms GtG
Manufacturer-published transition time
Contrast
1500000 : 1
Standard panel black depth
Colour Gamut
145 % sRGB
Standard game and web colour
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 Requirement3840 x 2160 pixels / Ultra HD (UHD) / 4K / 2160p up to 240 HzHigh refresh ceiling needs a high-end GPU to fully utilise
HDR & Brightness Reality
The QD-OLED panel, DisplayHDR 400 True Black badge and 1,000 cd/m² peak claim give this monitor credible HDR ingredients. Self-emissive pixels should provide much stronger black-level control than a basic LCD. However, typical brightness is not published, so there is no way to judge sustained bright-scene output from this sheet. The peak figure may apply only to small highlights, and no test-window size or duration is stated.
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 / Footprint613 mm x 389.4 mm x 168.7 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 Adjust120 mm (4.72 in)Supports eye-level positioning
Swivel / Pivot±45 ° / ±90 °Supports shared angles and portrait rotation
Real-World Use Cases
240 Hz and 0.03 ms GtG target premium PC systems
QD-OLED contrast and a 1,000 cd/m² peak claim support bright highlights against deep blacks
one cable can carry video, data and up to 90 W power
dual HDMI 2.1, DisplayPort and a three-port USB hub are listed
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
- 145 % sRGB coverage solid coverage for everyday colour accuracy
- Built-in USB hub adds convenient peripheral connectivity
- Stand offers 120 mm (4.72 in) height adjustment, swivel, pivot
- Backed by 3 years
- 165 ppi / 65 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
9.6/10
Great
Model Information
14
| Specification | Value |
|---|---|
| Brand | ASUS |
| Series | ROG Strix |
| Model | ROG Strix OLED XG27UCDMG |
| Model Alias | ROG Strix XG27UCDMG |
| Full Product Name | ASUS ROG Strix OLED XG27UCDMG |
| 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 | 26.5 in | |
| Exact Diagonal | 673.2 mm (26.50 in) | |
| Aspect Ratio | 16:9 | |
| Active Display Width | 589.97 mm (23.23 in) | |
| Active Display Height | 332.93 mm (13.11 in) | |
| Display Area | 86.79 % | |
| 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 | |
| OLED Generation | 4th Gen 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 | 3840 x 2160 pixels / Ultra HD (UHD) / 4K / 2160p | |
| Pixel Density | 165 ppi / 65 ppcm | 165 ppi / 65 ppcm indicates how much scaling may be needed in the operating system for comfortable reading. |
| Pixel Pitch | 0.155 mm (0.01 in) |
Picture Quality & Color
12
| Specification | Value | What It Means |
|---|---|---|
| Panel Bit Depth | 10 bits | |
| FRC | No | |
| Display Colors | 1073741824 colors / 30 bits | |
| 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 | |
| sRGB Coverage | 145 % | 145 % indicates how much of that color space the panel can reproduce, which affects color accuracy for photo/video work. |
| DCI-P3 Coverage | 99 % | |
| Gamma Adjustment | Yes |
Refresh Rate, Response & Gaming
11
| Specification | Value |
|---|---|
| Native Refresh Rate | 240 Hz |
| Refresh Rate Range | 48 Hz - 240 Hz |
| Minimum Response Time | 0.03 ms |
| AMD FreeSync | Yes |
| NVIDIA G-Sync | Yes |
| Motion Blur Reduction | Yes |
| Shadow Boost | Yes |
| GameFast Input | Yes |
| GameVisual | Yes |
| Picture-by-Picture | Yes |
| Picture-in-Picture | Yes |
Ports & Connectivity
14
| Specification | Value |
|---|---|
| HDMI Ports | 2 |
| HDMI Version | 2.1 |
| HDMI Bandwidth | 30 kHz - 590 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 | 90 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
16
| Specification | Value | What It Means |
|---|---|---|
| VESA Mount | Yes | |
| VESA Size | 100 x 100 mm | |
| Removable Stand | Yes | |
| Height Adjustment | Yes | 120 mm (4.72 in) of travel allows the screen to be raised or lowered for a comfortable eye-level position. |
| Height Adjustment Range | 120 mm (4.72 in) | |
| Tilt Adjustment | Yes | |
| Forward Tilt | 5 ° | |
| Backward Tilt | 20 ° / 1/4" Tripod Socket | |
| Swivel Adjustment | Yes | |
| Left Swivel | 45 ° | |
| Right Swivel | 45 ° | |
| Left Pivot | 90 ° | |
| Right Pivot | 90 ° | |
| Portrait Mode | Yes | |
| Security Lock | Yes | |
| Anti-Theft Lock | Kensington Lock |
Dimensions, Weight & Design
6
| Specification | Value |
|---|---|
| Dimensions With Stand | 613 mm x 389.4 mm x 168.7 mm (W x H x D) |
| Dimensions Without Stand | 613 mm x 369.2 mm x 66.5 mm (W x H x D) |
| Weight With Stand | 7.44 kg (16.4 lbs) |
| Weight Without Stand | 5 kg (11.02 lbs) |
| Stand Depth | 168.7 mm (6.64 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 | 80 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 | 10 % - 90 % |
| Storage Altitude | 12192 m / 40000 ft |
Eye Care, Protection & Additional Features
15
| Specification | Value |
|---|---|
| Flicker-Free | Yes |
| Low Blue Light | Yes |
| Proximity Sensor | Yes |
| OLED Protection | Yes |
| OLED Care | 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 |
| Multiple HDR Modes | Yes |
| Anti-Theft Slot | Yes (Kensington lock slot) |
| Additional Monitor Features | 6-axis adjustment; Asus DisplayWidget Center; Aura Sync; Clear Pixel Edge; Color Temperature Selection; Custom Heatsink; GameFast Input; GamePlus; GameVisual; Multiple HDR Mode; Neo Proximity Sensor |
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
4
| Specification | Value |
|---|---|
| HDMI Cable | HDMI cable |
| DisplayPort Cable | DisplayPort cable (optional) |
| USB-C Cable | USB Type-C cable |
| USB Upstream Cable | USB 3.2 cable (optional) |
Packaging Information
5
| Specification | Value |
|---|---|
| Package Dimensions | 860 mm x 500 mm x 163 mm (W x H x D) |
| Package Width | 860 mm (33.86 in) |
| Package Height | 500 mm (19.68 in) |
| Package Depth | 163 mm (6.42 in) |
| Package Weight | 10.3 kg (22.71 lbs) |
Frequently Asked Questions
01 Why is typical brightness missing from the XG27UCDMG sheet? +
Only the 1,000 cd/m² peak is published here. Without a typical or full-screen figure, sustained brightness cannot be assessed honestly.
02 How demanding is 4K at 240 Hz on a 26.5-inch screen? +
It requires a high-end GPU in demanding games, especially at native resolution. Actual frame rate depends on the title, settings and any upscaling used.
03 What does the fourth-generation QD-OLED description tell buyers? +
It identifies the panel generation and self-emissive technology, but the sheet does not give measured efficiency, text clarity or burn-in performance. Those points cannot be inferred from the label alone.
04 Can the 90 W USB-C connection replace a laptop dock? +
It combines DisplayPort Alt Mode, USB data and up to 90 W power, while three Type-A downstream ports are listed. It can cover many desk needs, but the sheet does not list every dock feature such as Ethernet.
05 Why are speakers absent on such a premium gaming monitor? +
The sheet lists no speakers and provides only a 3.5 mm audio output. Headphones, powered speakers or another audio system are required.
Reviews
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № ROG STRIX OLED XG27UCDMG