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27 inch black gaming monitor on adjustable stand thin bezels anti reflection OLED screen

ASUS

ASUS ROG Strix XG27UCDMG 27" 4K 240Hz OLED gaming monitor

SKU CH-9MSW-4AKE0 MPN XG27UCDMG

A 27-inch 4K OLED panel running at 240 Hz with 0.03 ms response, 99% DCI-P3 colour and a Neo Proximity Sensor that blanks the screen to limit burn-in risk

  • Screen size27 in (68.6 cm)
  • Display resolution3840 × 2160 (4K)
  • Refresh frequency240 Hz
  • Panel typeOLED
  • Pixel response time0.03 ms (GTG)
  • Power draw<80 W Power Saving Mode: <0.5 W Power Off Mode: <0.3 W
  • 4K 240Hz QD-OLED panel delivers ultra-smooth competitive gaming
  • 03ms response time eliminates ghosting in fast-paced scenes
  • 99% DCI-P3 and 145% sRGB coverage for accurate colour work
  • Neo Proximity Sensor blanks the screen when you step away to reduce burn-in risk
  • USB-C with 90W power delivery simplifies laptop docking

27-inch 4K 240Hz QD-OLED monitor

The ASUS ROG Strix XG27UCDMG uses a 26.5-inch fourth-generation QD-OLED panel with a 3840 x 2160 resolution and 240Hz refresh rate. A 0.03ms GTG response time and 1,500,000:1 contrast ratio support fast-paced gaming. The panel covers 99% DCI-P3 and 145% sRGB with 1.07 billion colours.

Competitive gamers and colour-critical creators

The 27-inch 4K 240Hz combination suits players who want high pixel density and motion clarity together. Creative professionals benefit from the wide gamut and factory calibration potential. Users who need higher sustained full-screen brightness for bright rooms or who prefer a larger diagonal for productivity should consider other models.

Sustained-load behaviour with OLED Care Pro

Peak brightness reaches 1000cd/m² in HDR while full-screen white output sits at 250cd/m². OLED Anti-Flicker 2.0 reduces flicker by 20% compared to the previous panel generation during variable refresh rates. The Neo Proximity Sensor detects user absence and switches the screen to black, lowering burn-in risk during long idle periods. Uniform Brightness keeps luminance consistent across varying content loads.

How it compares

Measured against everything we stock in Monitors for Gamers, at today’s prices. Recalculated every night.

Price $661.99
Pricier than about 90% of the 839 comparable items (median $189.99).
Screen size 27 in (68.6 cm)
Typical for this category: the median of 814 items is 27 in.
Refresh frequency 240 Hz
Higher than about 70% of the 735 comparable items (median 180 Hz).

Specifications

Product
Brand nameASUS
Product lineROG Strix
Model nameXG27UCDMG
Case colorBlack
Display
Screen size27 in (68.6 cm)
Display resolution3840 × 2160 (4K)
Refresh frequency240 Hz
Panel typeOLED
Pixel response time0.03 ms (GTG)
Image brightness450cd/m2 (Max), 1000cd/m2 (HDR, Peak), 250cd/m2 (100% APL)
Screen curvatureFlat Panel
Bezel style3 Sided Thin Frame
Widescreen formatYes
Screen finishAnti-Reflection
Display formatUHD
Variable refresh rateFreeSync Premium Pro & G-Sync Compatible
Screen ratio16:9
Contrast1,500,000:1
Color gamut coverage99% DCI-P3, 145% sRGB
Colors displayed1.07 Billion
Pixel pitch0.15525 mm
DisplayHDR certificationDisplayHDR True Black 400
Audio & video
Integrated speakersNo
Integrated webcamNo
Ports & slots
HDMI ports2 x HDMI 2.1
DisplayPort connectors1 x DisplayPort 1.4
Video connectors1 x DisplayPort 1.4 / 1 x USB-C (DP Alternative) 90 W / 2 x HDMI 2.1
USB connectionsUSB 3.2 Gen 1
Headphone jackYes
Power
Power draw<80 W
Power Saving Mode: <0.5 W
Power Off Mode: <0.3 W
Power supply100–240 VAC, 50/60 Hz
Size & build
Stand adjustabilityTilt: Yes (+20° ~ -5°)
Swivel: Yes (+45° ~ -45°)
Pivot: Yes (+90° ~ -90°)
Height Adjustment: 0 to 120 mm
VESA mounting pattern100 × 100 mm
Product dimensions20.06 in × 24.13 in × 6.64 in with Stand
14.54 in × 24.03 in × 2.62 in without Stand
Product weight16.4 lb with Stand
11.02 lb without Stand
Shipping weight9.71 kg
Package size860 × 500 × 163 mm

Questions about this item

Will the 240 Hz refresh rate work at 4K over HDMI?

HDMI 2.1 supports 4K at 240 Hz on this monitor, so the full refresh rate is available through that port.

Can the USB-C port charge a laptop while delivering video?

The USB-C connection provides DisplayPort Alt Mode plus 90 W power delivery, handling both signal and charging simultaneously.

Does the stand allow the screen to be turned vertically for coding?

The included stand offers height adjustment, pivot, swivel and tilt, so the panel can be rotated into portrait orientation.

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