ASUS ROG Strix OLED XG27UCDMG / Dell UltraSharp U2725QE

ASUS ROG Strix OLED XG27UCDMG: XG27UCDMG · 26.5-inch 4K 240 Hz QD-OLED

Dell UltraSharp U2725QE: U2725QE · 27-inch

SpecificationASUS ROG Strix OLED XG27UCDMGDell UltraSharp U2725QE
Release year20252025
Panel26.5-inch (27-inch class) QD-OLED, 16:9, anti-reflection surface

QD-OLED pairs self-emitting pixels with a quantum-dot colour layer; each pixel switches off individually, so blacks are fully dark.

ASUS		—
Resolution and refresh3840 × 2160, 240 Hz

The 4K 240 Hz signal travels over DisplayPort 1.4 with DSC compression, or over HDMI 2.1 depending on graphics-card support.

ASUS		—
Response time0.03 ms (GtG)

This is the grey-to-grey pixel transition time, not total input lag.

ASUS		5 ms GtG (fast mode); 8 ms GtG

Pixel transition specification, not total input lag.

Dell
Brightness1000 cd/m² HDR peak

ASUS notes peak brightness may vary with colour pre-calibration; the peak is reached on a small screen area.

ASUS		450 nits typical; 600 nits peak; HDR 600 Dell
Contrast1,500,000:1 (typical) ASUS—
Colour99% DCI-P3, 145% sRGB; ΔE < 2; 10-bit

Factory calibration (ΔE < 2) means colours are set close enough to target that differences are hard to see.

ASUS		1.07 billion colours; 100% sRGB and Rec.709; 99% DCI-P3 and Display P3; factory calibration average ΔE < 1.5 Dell
HDRHDR10; VESA DisplayHDR 400 True Black ASUS—
Inputs1 × DisplayPort 1.4 (DSC); 2 × HDMI 2.1 (FRL); 1 × USB-C (DP Alt Mode, 90 W power)

The USB-C input takes video from a laptop and charges it at up to 90 W over one cable. HDMI 2.1 suits consoles at 4K 120 Hz.

ASUS		—
USB hub and audio3 × USB 3.2 Gen 1 Type-A; headphone jack ASUS—
Variable refreshFreeSync Premium Pro, G-SYNC Compatible; VESA AdaptiveSync Display 240 Hz

Variable refresh matches the screen's rate to the graphics card's frame rate, reducing tearing and stutter.

ASUS		—
FeaturesASUS OLED Care, KVM switch, Extreme Low Motion Blur, Neo Proximity Sensor, flicker-free

KVM shares a keyboard and mouse connected to the monitor between two computers. The proximity sensor dims the screen when the user leaves to reduce OLED wear.

ASUS		—
Power consumption< 80 W; < 0.5 W in power saving; < 0.3 W off; 100–240 V ASUS25.4 W operating; 325 W maximum; 0.5 W standby; 0.3 W off Dell
StandTilt +20°/−5°, swivel ±45°, pivot ±90°, 0–120 mm height; VESA 100 × 100; 1/4-inch tripod socket

The tripod socket lets a camera or light be mounted on the stand.

ASUS		150 mm height; −5°/+21° tilt; ±45° swivel; ±90° pivot Dell
Dimensions and weightWith stand 61.30 × 50.94 × 16.87 cm, 7.44 kg; without stand 61.03 × 36.92 × 6.65 cm, 5.0 kg ASUS—
Warranty3 years (including panel burn-in)

Warranty terms may vary by country.

ASUS		3-year limited hardware warranty; Advanced Exchange

Terms from the UK model page; may vary by country.

Dell
In the boxDisplayPort, Ultra High Speed HDMI, USB 3.2 and USB-C cables; power cord; VESA mount kit; microfibre cloth ASUSPower cable; 1.8 m DisplayPort 1.4; 1 m USB-A to USB-C; 1 m passive Thunderbolt 4 cable Dell
Display—27-inch IPS Black; 3840 × 2160; 163 ppi; anti-glare surface Dell
Refresh rate—120 Hz; 48–120 Hz variable refresh

Variable refresh works over HDMI 2.1; dynamic refresh rate (DRR) over DisplayPort is also listed for Windows.

Dell
Rated contrast—3000:1 native contrast

IPS Black targets darker blacks than conventional IPS; it does not give per-pixel black like OLED or local-dimming displays.

Dell
Thunderbolt 4—1 × upstream: video (DP 1.4, DSC), data and 140 W EPR charging; 1 × downstream: daisy chain, 15 W

Two 4K monitors can run from one computer through a Thunderbolt 4 daisy chain.

Dell
Video inputs—1 × HDMI 2.1 (4K 120 Hz, VRR); 1 × DisplayPort 1.4 in (DSC, HDCP 2.2); 1 × DisplayPort out Dell
USB hub—Thunderbolt 4 or USB-C upstream (10 Gbit/s); 2 × USB-C (10 Gbit/s, 15 W); 4 × USB-A (10 Gbit/s, one with BC 1.2 charging) Dell
Power delivery—Up to 140 W EPR

Requires a compatible computer and cable.

Dell
Ethernet—2.5 GbE Dell
Audio—3.5 mm analogue line-out; no built-in speakers Dell
Multiple sources—Built-in KVM; PiP and PbP

KVM switches one keyboard and mouse between two computers; PiP/PbP show two sources at once.

Dell
Eye comfort and sensor—ComfortView Plus (blue light ≤ 35%); TÜV 5-star eye comfort; ambient light sensor

The sensor can adjust brightness and colour temperature automatically; see owner experiences for firmware-related issues.

Dell
VESA—100 × 100 mm Dell
Panel without stand—612.44 × 353.51 × 55.60 mm; 5.22 kg Dell
Weight with stand—7.06 kg (with stand and cables) Dell
Firmware—M2T102 (A01, 19 August 2025)

Dell says it targets wake-from-sleep, USB dropping to 480 Mbit/s on MacBooks, auto brightness/colour temperature sensing and daisy-chained displays not waking.

Dell