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A black 34-inch curved ultra-wide QD-OLED gaming monitor on an adjustable stand

ASUS

ASUS ROG Strix XG34WCDMS 34" QD-OLED 280Hz gaming monitor

SKU CH-BV3T-42KXX MPN XG34WCDMS

A 34-inch 21:9 QD-OLED curved gaming monitor with 3440 x 1440 resolution, 280Hz refresh rate, 0.03ms response time, 1300 cd/m² HDR peak brightness, 1,500,000:1 contrast, 99% DCI-P3.

  • Cabinet ColorBlack
  • Screen Size34"
  • WidescreenYes
  • PanelQD-OLED
  • Adaptive Sync TechnologyFreeSync Premium Pro & G-Sync Compatible
  • Resolution3440 x 1440

Option 280Hz Tandem RGB OLED

  • Ultra-wide 34-inch QD-OLED wraps the action around you with an 1800R curve
  • 280Hz refresh and 0.03ms GTG response keep every frame sharp in fast games
  • 1300 cd/m² HDR peak with 99% DCI-P3 and Delta E
  • USB-C with 15-watt Power Delivery plus DisplayPort 1.4 and HDMI 2.1 connect PC and peripherals
  • Neo Proximity Sensor blanks the screen when you step away to reduce burn-in risk

34-inch QD-OLED Ultrawide for Gaming

The 34-inch panel delivers a 3440 x 1440 resolution across a 21:9 aspect ratio with a 1800R curve. A 280Hz refresh rate and 0.03ms GTG response time serve competitive gaming, while 99% DCI-P3 coverage and Delta E<2 accuracy support colour-critical editing tasks.

Connectivity and Ergonomics for a Clean Desk Setup

Video inputs include DisplayPort 1.4 DSC, two HDMI 2.1 ports and a USB-C connection with 15-watt Power Delivery. Three USB 3.2 Gen 1 Type-A ports handle peripherals, and the stand provides height, swivel and tilt adjustment alongside a 100 x 100mm VESA mount option.

Burn-in Mitigation and Consistent HDR Output

ASUS OLED Care Pro uses a Neo Proximity Sensor to detect user absence and automatically dims the screen to a black frame, reducing long-term burn-in risk. VESA DisplayHDR 500 True Black certification ensures a 1,500,000:1 contrast ratio and 1300 cd/m² peak brightness are maintained during extended sessions rather than only in short bursts.

Highlights

  • Ultra-wide 34-inch QD-OLED wraps the action around you with an 1800R curve
  • 280Hz refresh and 0.03ms GTG response keep every frame sharp in fast games
  • 1300 cd/m² HDR peak with 99% DCI-P3 and Delta E
  • USB-C with 15-watt Power Delivery plus DisplayPort 1.4 and HDMI 2.1 connect PC and peripherals
  • Neo Proximity Sensor blanks the screen when you step away to reduce burn-in risk

Specifications

BrandASUS
SeriesROG Strix OLED
ModelXG34WCDMS
Cabinet ColorBlack
Screen Size34"
WidescreenYes
PanelQD-OLED
Adaptive Sync TechnologyFreeSync Premium Pro & G-Sync Compatible
Resolution3440 x 1440
Viewing Angle178° (H) / 178° (V)
Aspect Ratio21:9
Brightness1300 cd/m2 (HDR, Peak)
Contrast Ratio1,500,000:1
Response Time0.03ms(GTG)
Display Colors1.07 Billion
Monitor Pixel Density0.231mm
Refresh Rate280Hz
HDR StandardHDR10
Curved Surface ScreenCurved
Curvature Radius1800R
Video Ports1 x DisplayPort 1.4 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.1
USB Ports3 x USB 3.2 Gen 1 Type-A
HeadphoneYes
Power Supply100 - 240 VAC, 50/60Hz
Power ConsumptionPower Consumption : 34W
Power Saving Mode : <0.5W
Power Off Mode : <0.3W
Stand AdjustmentsHeight, Swivel, Tilt
Built-in SpeakersNo
Built-in WebcamNo
VESA Compatibility - Mountable100 x 100mm
FeaturesGamePlus
Game Visual
VRR Technology: FreeSync Premium Pro & G-SYNC Compatible
Extreme Low Motion Blur
DisplayWidget, DisplayWidget Center
GameFast Input technology
Shadow Boost
Aspect Control
KVM Switch
A.I. Assistant Technology: AI Visual
A.I. Assistant Technology: Dynamic Crosshair
A.I. Assistant Technology: Dynamic Shadow Boost
Dimensions21.47" x 32.00" x 7.10" with stand
14.70" x 32.00" x 4.25" without stand
Weight16.31 lbs. with stand
11.46 lbs. without stand
Package ContentsDisplayPort cable
Microfiber cloth
Power cord
Quick start guide
ROG pouch
ROG sticker
USB 3.2 cable
VESA mount kit
Warranty Card
Shipping weight10.07 kg
Package size953 × 483 × 165 mm

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Questions about this item

Does the 1300 cd/m² peak brightness hold steady during hours of HDR gaming?

The panel reaches 1300 cd/m² peak in HDR and is VESA DisplayHDR 500 True Black certified, so sustained full-screen brightness will sit at the certified 500 cd/m² level rather than the peak figure.

How much heat and power does the monitor draw when running at 280 Hz all day?

Typical power draw is 34 W, dropping below 0.5 W in power-saving mode and below 0.3 W when off; with no active cooling fan mentioned, the unit relies on passive dissipation and stays cool enough for continuous use.

What cables and ports must my PC already have to run 3440×1440 at 280 Hz with 10-bit colour?

You need a GPU with either DisplayPort 1.4 DSC or HDMI 2.1 output and a matching cable; the box includes a DisplayPort cable and an HDMI 2.1 cable, and the monitor also offers USB-C with 15 W Power Delivery for compatible laptops.

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