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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.

  • Screen size34 in (86.4 cm)
  • Display resolution3440 × 1440
  • Refresh frequency280 Hz
  • Panel typeQD-OLED
  • Pixel response time0.03 ms(GTG)
  • HDR formatHDR10

Model 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.

How it compares

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

Price $723.99
Pricier than about 90% of the 839 comparable items (median $189.99).
Screen size 34 in (86.4 cm)
Higher than about 90% of the 814 comparable items (median 27 in).
Refresh frequency 280 Hz
Higher than about 87% of the 735 comparable items (median 180 Hz).

Specifications

Product
Brand nameASUS
Product lineROG Strix OLED
Model nameXG34WCDMS
Case colorBlack
Display
Screen size34 in (86.4 cm)
Display resolution3440 × 1440
Refresh frequency280 Hz
Panel typeQD-OLED
Pixel response time0.03 ms(GTG)
HDR formatHDR10
Image brightness1300 cd/m2 (HDR, Peak)
Screen curvatureCurved
Widescreen formatYes
Variable refresh rateFreeSync Premium Pro & G-Sync Compatible
Viewing angles178° (H) / 178° (V)
Screen ratio21:9
Contrast1,500,000:1
Colors displayed1.07 Billion
Pixel pitch0.231 mm
Audio & video
Integrated speakersNo
Integrated webcamNo
Ports & slots
Video connectors1 x DisplayPort 1.4 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.1
USB connections3 x USB 3.2 Gen 1 Type-A
Headphone jackYes
Power
Power draw34 W
Power Saving Mode : <0.5 W
Power Off Mode : <0.3 W
Power supply100–240 VAC, 50/60 Hz
Size & build
Stand adjustabilityHeight, Swivel, Tilt
VESA mounting pattern100 × 100 mm
Product dimensions21.47 in × 32 in × 7.1 in with stand
14.7 in × 32 in × 4.25 in without stand
Product weight16.31 lb with stand
11.46 lb without stand
Shipping weight10.07 kg
Package size953 × 483 × 165 mm
In the box
In the boxDisplayPort cable
Microfiber cloth
Power cord
Quick start guide
ROG pouch
ROG sticker
USB 3.2 cable
VESA mount kit
Warranty Card

Other versions of this model

1 more in the same range

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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