ASUS ROG Strix OLED XG27UCDMG - 27" 4K 240Hz QD-OLED Monitor
ASUS ROG
ASUS ROG Strix OLED XG27UCDMG - 27" 4K 240Hz QD-OLED Monitor
The ASUS ROG Strix OLED XG27UCDMG is a 27-inch 4K 240Hz gaming monitor built around a fourth-generation Tandem QD-OLED panel, aimed at competitive gamers and creative professionals who need both fast motion handling and accurate colour reproduction. It pairs a 0.03ms gray-to-gray response time with OLED Anti-Flicker 2.0 and the OLED Care Pro suite — including a Neo Proximity Sensor — to keep image quality consistent and reduce burn-in risk during long sessions.
Why this product
Fourth-gen Tandem QD-OLED panel
The latest generation Tandem QD-OLED technology delivers sharper imagery and crystal-clear text, and is rated for a longer lifespan compared to previous-generation OLED panels.
240Hz refresh rate with 0.03ms response
A 240Hz maximum refresh rate and 0.03ms gray-to-gray response time keep fast-moving scenes sharp and fluid without obvious ghosting.
OLED Anti-Flicker 2.0 reduces flicker by 20%
A new luminance compensation algorithm cuts flicker by 20% compared to the previous-generation panel, supporting longer, more comfortable viewing sessions.
Neo Proximity Sensor guards against burn-in
The OLED Care Pro suite uses a Neo Proximity Sensor to detect when the user steps away, switching the screen to black automatically to reduce burn-in risk.
99% DCI-P3 and true 10-bit colour
With 99% DCI-P3 coverage, true 10-bit colour, Delta E < 2, and VESA DisplayHDR 400 True Black certification, this monitor is suited for HDR gaming and colour-critical creative work.
USB-C with 90W power delivery
The single-cable USB-C port carries DisplayPort Alt mode video and up to 90W of power delivery, letting compatible laptops connect and charge simultaneously.
- Panel Size (viewable)26.5 inches
- Resolution3840 × 2160 (4K UHD)
- Refresh Rate240Hz
- Response Time (GTG)0.03ms
- Panel TechnologyTandem QD-OLED
- Peak Brightness (HDR)1,000 cd/㎡
- HDR CertificationVESA DisplayHDR 400 True Black
- VRR SupportFreeSync Premium Pro & G-SYNC Compatible
- SKUASU-2582
- EAN4711387973332
- Compatible with AMD FreeSync Premium Pro graphics cards for variable refresh rate tear-free gaming.
- G-SYNC Compatible certified, so it works with NVIDIA G-SYNC Compatible GPUs without needing a discrete G-SYNC module.
- DisplayPort 1.4 with DSC supports 4K 240Hz output from capable desktop GPUs.
- HDMI 2.1 (×2) connects to current-generation gaming consoles and PCs at high resolutions and refresh rates.
- USB-C (DP Alt mode + 90W PD) connects directly to laptops with a Thunderbolt or USB-C DisplayPort output.
- Achieving the full 4K 240Hz spec requires a source that outputs DisplayPort 1.4 DSC or a compatible USB-C signal; HDMI 2.1 bandwidth may limit resolution or refresh rate depending on the connected device.
Best for
- Competitive gamers who want the lowest possible motion blur: the 240Hz refresh rate and 0.03ms GTG response time keep fast scenes sharp.
- Photo and video editors who need accurate colour: 99% DCI-P3, true 10-bit colour, and Delta E < 2 meet professional colour-accuracy requirements.
- HDR content consumers who want genuine HDR contrast: VESA DisplayHDR 400 True Black certification and a 1,000 cd/㎡ peak brightness enable deep blacks alongside bright highlights.
- Laptop users who want a single-cable desktop setup: the USB-C port handles video and up to 90W of charging in one connection.
- Long-session users concerned about OLED longevity: OLED Anti-Flicker 2.0 and the OLED Care Pro suite with Neo Proximity Sensor actively work to reduce flicker and burn-in risk.
Trade-offs
- Buyers on a tight budget: a 4K 240Hz QD-OLED panel with burn-in protection technology sits at the higher end of the monitor price range.
- Users needing very high sustained brightness: VESA DisplayHDR 400 True Black is the certified tier here; buyers requiring DisplayHDR 1000 or higher sustained brightness should look at a higher-rated alternative.
- Setups limited to older GPU outputs: getting the full 4K 240Hz refresh rate requires DisplayPort 1.4 DSC or compatible USB-C; older GPU connections may not support that combination.
- Users who want a larger screen: the viewable panel area is 26.5 inches; those wanting 32 inches or above will need a different model.
General
| Brand | ASUS ROG |
|---|---|
| Model | ROG Strix OLED XG27UCDMG |
| Panel Size (viewable) | 26.5 inches |
| Panel Technology | Tandem QD-OLED |
| Aspect Ratio | 16:9 |
Display Performance
| Resolution | 3840 × 2160 (4K UHD) |
|---|---|
| Refresh Rate (max) | 240Hz |
| Response Time (GTG) | 0.03ms |
| Peak Brightness (HDR) | 1,000 cd/㎡ |
| Viewing Angle (H/V) | 178° / 178° |
| Flicker Free | Yes (OLED Anti-Flicker 2.0) |
Colour & HDR
| Colour Space (DCI-P3) | 99% |
|---|---|
| Colour Space (sRGB) | 145% |
| Colour Depth | 10-bit |
| Delta E | < 2 |
| HDR Support | HDR10, VESA DisplayHDR 400 True Black |
| VRR Technology | FreeSync Premium Pro & G-SYNC Compatible |
Connectivity & Physical
| DisplayPort | DisplayPort 1.4 DSC × 1 |
|---|---|
| HDMI | HDMI 2.1 × 2 |
| USB-C | USB-C (DP Alt mode + 90W PD) × 1 |
| USB-A | USB 3.2 Gen 1 Type-A × 3 |
| Audio Out | Earphone jack |
| Dimensions without Stand (W × H × D) | 61.03 × 36.92 × 6.65 cm |
| Weight without Stand | 5.0 kg (11.02 lbs) |
| Weight with Stand | 7.44 kg (16.40 lbs) |
| Certifications | TÜV Flicker-free, VESA DisplayHDR 400 True Black, G-SYNC Compatible, FSC MIX |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.