Display
27-inch, IPS, 2560 x 1440
27
Refresh Rate
48 Hz - 255 Hz
48 Hz
Brightness
350 cd/m² (peak 400 cd/m²)
350 cd
Contrast Ratio
1300 : 1 / Dynamic 100000000 : 1
1300
Overview
A 255 Hz ceiling is the defining spec of the Asus ROG Strix XG27ACMES, a 27-inch IPS panel at 2560 x 1440. The sheet lists FreeSync Premium, G-Sync Compatible and VESA AdaptiveSync Display 255Hz, alongside 1 ms GtG and 0.3 ms MPRT claims. Colour coverage is also strong on paper at 133% sRGB and 97% DCI-P3, using 8-bit plus FRC output. Its fully adjustable stand includes 110 mm height movement, ±90° pivot and ±45° swivel. The main compromises are limited HDR hardware, no speakers and only 15 W USB-C power. Typical brightness is 350 cd/m² and peak is 400 cd/m², leaving little highlight headroom. Buy it if 255 Hz QHD speed and ergonomics matter; skip it if useful HDR or laptop-class charging is needed.
BrandAsusPanel TypeIPSResolution2560 x 1440Refresh Rate48 Hz - 255 Hz
Key Highlights
- 27-inch QHD IPS panel
- 255 Hz maximum refresh
- Three listed adaptive-sync standards
- 97% DCI-P3 and 133% sRGB coverage
- Height, swivel and pivot adjustments
Who Should Buy the Asus ROG Strix XG27ACMES
+ Best For
Competitive QHD players
255 Hz targets high frame rates
Mixed GPU households
FreeSync and G-Sync Compatible are listed
Colour-rich gaming
97% DCI-P3 coverage is claimed
Flexible desks
the stand supports height, swivel and portrait rotation
× Not Ideal For
HDR buyers
peak brightness is only 400 cd/m²
Laptop docking
USB-C supplies 15 W
Built-in audio users
no speakers are included
Low-powered PCs
QHD at 255 fps is demanding
Display Performance
Refresh Rate
48 Hz - 255 Hz
The published variable or fixed refresh range
Response Time
1 ms (GtG); 0.3 ms (MPRT)
The sheet runs GtG and MPRT claims together
Brightness
350 cd/m² typical; 400 cd/m² peak
Compare normal output with the stated maximum
Contrast
1300 : 1
The stated static contrast figure
Colour Gamut
133% sRGB; 97% DCI-P3
Published gamut coverage, not a calibration result
HDR
DisplayHDR 400 / HDR10
Format support does not guarantee strong HDR hardware
Gaming Performance
Refresh Rate48 Hz - 255 HzSets the monitor's motion ceiling
Response Time1 ms (GtG); 0.3 ms (MPRT)Published claim; no independent measurement is supplied
VRR / Adaptive SyncAMD FreeSync Premium / NVIDIA G-Sync Compatible / VESA AdaptiveSync Display 255HzUse only the listed sync support
GPU RequirementFast GPU recommendedQHD near 255 Hz needs high frame rates
HDR & Brightness Reality
DisplayHDR 400 is not a strong selling point on this panel. Typical brightness is 350 cd/m² and peak brightness is 400 cd/m², so only 50 cd/m² of extra highlight output is stated. The IPS contrast ratio is 1300:1, and no local dimming is published. HDR10 signals are supported, but the sheet describes an entry-level HDR range rather than hardware built for pronounced highlights.
Connectivity & Ports
HDMI1 x HDMI 2.1One modern HDMI input
DisplayPort1 x DisplayPort 1.4 HBR3Main high-refresh PC connection
USB-CUSB 3.2 Gen 1, DP Alt Mode, 15 WCarries video but not laptop-class power
USB HubNot publishedNo downstream Type-A hub appears
Audio Out1 x 3.5 mmConnects external audio
Desk Fit & Ergonomics
Size / Footprint614.8 mm x 393.4 mm x 188.7 mm with standCheck desk width and depth before buying
StandRemovable; 5.96 kgThe supplied stand can be removed
VESA Mount100 x 100 mmCompatible with a matching arm or wall mount
Tilt-5° to +20°Published forward and backward range
Height Adjust110 mmVertical adjustment as listed
Swivel / Pivot±45° swivel; ±90° pivotShows side movement and portrait support
Real-World Use Cases
255 Hz and fast response claims target speed
both major adaptive-sync options are listed
97% DCI-P3 gives a wide-gamut claim
±90° pivot and 110 mm height adjustment aid desk use
Pros & Cons
Pros
- 255 Hz QHD performance
- Broad adaptive-sync support
- 97% DCI-P3 coverage
- Fully adjustable stand
- HDMI 2.1 and DisplayPort 1.4
Cons
- Minimal HDR headroom
- No built-in speakers
- USB-C power limited to 15 W
- No USB Type-A hub listed
Score & Ratings
8.2/10
Great
Basic Information
5
| Specification | Value |
|---|---|
| Brand | Asus |
| Model | ROG Strix XG27ACMES |
| Series | ROG Strix |
| Model Alias | ROG Strix XG27ACMES-W |
| Model Year | 2025 |
Display
8
| Specification | Value | What It Means |
|---|---|---|
| Size Class | 27-inch | 27-inch - the mainstream desk size; comfortable at roughly 60-80 cm. |
| Panel Type | IPS | IPS - wide viewing angles and stable colour, with the usual contrast weakness at 1300 : 1. |
| Curvature | Not specified | |
| Resolution | 2560 x 1440 | QHD - roughly 1.8 times the pixels of 1080p, or 109 PPI here. |
| Aspect Ratio | 16:9 | |
| Pixel Density | 109 PPI | 109 PPI - standard desktop density; fine for gaming, average for long reading. |
| Pixel Pitch | 0.233 mm (millimeters) | |
| Display Area | 88.75 % (percent) |
Color & HDR
5
| Specification | Value | What It Means |
|---|---|---|
| Color Depth | 10 bits (8 bits + FRC) (FRC: Yes) | 10 bits (8 bits + FRC) (FRC: Yes) - 10-bit simulated with frame-rate control, so gradients are smoother than true 8-bit but not native. |
| Colors | 1073741824 colors | |
| sRGB | 133% | 133% - coverage of the standard web and photo space; anything at or above 100% covers it fully. |
| DCI-P3 Coverage | 97% | 97% - saturated and accurate enough for photo review alongside gaming. |
| HDR Support | DisplayHDR 400HDR10 |
DisplayHDR 400 / HDR10 - the entry tier; with this panel's brightness there is little real effect. |
Brightness & Contrast
3
| Specification | Value | What It Means |
|---|---|---|
| Brightness (Typical) | 350 cd/m² | 350 cd/m² - comfortable indoors, adequate near a window. |
| Peak Brightness | 400 cd/m² | 400 cd/m² - the ceiling for short bright highlights, not sustained full-screen output. |
| Contrast | 1300 : 1 |
Performance
3
| Specification | Value |
|---|---|
| Refresh Rate | 48 Hz - 255 Hz |
| Response Time | 1 ms (GtG)0.3 ms (MPRT) |
| Adaptive Sync | AMD FreeSync PremiumNVIDIA G-Sync CompatibleVESA AdaptiveSync Display 255Hz |
Display Technologies
1
| Specification | Value |
|---|---|
| Advanced Display Technologies | Panel Technology: -Backlight: W-LEDViewing Angles: 178° / 178° (H / V)MPRT Response: 0.3 ms (MPRT)Dynamic Contrast: 100000000 : 1Input Lag: -Screen Coating: Anti-glare/Matte |
Camera
1
| Specification | Value |
|---|---|
| Camera | No |
Audio
1
| Specification | Value |
|---|---|
| Audio | 3.5 mm Audio Out |
Connectivity & Ports
2
| Specification | Value |
|---|---|
| Ports | 1× USB 3.2 (Type-C · Gen 1 · 5 Gbps · upstream · 15W · DP Alt Mode)1× HDMI 2.11× DisplayPort 1.4 (HBR3)1× 3.5 mm Audio OutHigh-bandwidth Digital Content Protection (HDCP) |
Ergonomics
6
| Specification | Value |
|---|---|
| VESA Mount | 100 x 100 mm |
| Height Adjustment | 110 mm |
| Pivot | ±90° |
| Swivel | ±45° |
| Tilt | -5° to +20° |
| Removable Stand | Yes |
Gaming Features
1
| Specification | Value |
|---|---|
| Gaming Features | Adaptive-Sync technologyAMD FreeSync PremiumDynamic CrosshairDynamic Shadow BoostExtreme Low Motion Blur Sync (ELMB Sync)Fast IPSGameFast InputGamePlusGameVisualNVIDIA G-Sync CompatibleTace Free technologyVariable Overdrive 2.0VESA AdaptiveSync Display 255Hz |
Smart & Software Features
2
| Specification | Value |
|---|---|
| Smart Features | 6-axis Color AdjustmentAI VisualAsus DisplayWidget CenterAsus Power SyncColor Temperature Selection (8 modes)Flicker-free technologyGamm AdjustmentLow Blue LightROG Gaming A.I technology |
Power Consumption
5
| Specification | Value |
|---|---|
| Voltage | 100–240V |
| Frequency | 50/60Hz |
| Average Consumption | 21W |
| Standby | 0.3W |
Certificates
1
| Specification | Value |
|---|---|
| Certificates | TÜV Rheinland Flicker-free CertifiedTÜV Rheinland Low Blue Light Certified |
Design, Build & Dimensions
9
| Specification | Value |
|---|---|
| Without Stand Width | 614.8 mm |
| Without Stand Height | 367.1 mm |
| Without Stand Depth | 63 mm |
| Without Stand Weight | 3.87 kg |
| With Stand Width | 614.8 mm |
| With Stand Height | 393.4 mm |
| With Stand Depth | 188.7 mm |
| With Stand Weight | 5.96 kg |
| Color | Black |
Operating Conditions
2
| Specification | Value |
|---|---|
| Temperature | 0°C – 40°C |
Frequently Asked Questions
01 Why does the XG27ACMES list both 1 ms GtG and 0.3 ms MPRT? +
They are different response-time methods, but the source runs them together in one line. Neither figure is an independent measurement.
02 Is 15 W USB-C enough for anything beyond video? +
It can provide light power while carrying DisplayPort Alt Mode. It is not enough to replace a normal laptop charger.
03 What makes the 255 Hz adaptive-sync support unusually broad? +
The sheet lists FreeSync Premium, G-Sync Compatible and VESA AdaptiveSync Display 255Hz. That covers both main GPU brands and a VESA certification.
04 How much better is 97% DCI-P3 than the sRGB figure alone? +
DCI-P3 is a wider colour space, and 97% coverage suggests broad gamut capability. The sheet does not publish calibration error, so accuracy is not guaranteed.
05 What is the biggest hardware limit behind the HDR badge? +
Peak brightness reaches only 400 cd/m², just 50 cd/m² above typical output. No local-dimming system is listed.
Reviews
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № ROG STRIX XG27ACMES