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ASUS ROG Strix OLED XG27UCDMG vs Samsung Odyssey OLED G8 G81SF 27-inch

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

ASUSROG Strix OLED XG27UCDMGSamsungOdyssey OLED G8 G81SF 27-inch
Overview
ReleasedApril 2025April 2025
Display
Screen size26.5″27″
Resolution3840 × 2160 (4K)3840 × 2160 (4K)
Sharpness166 pixels per inch163 pixels per inch
PanelQD-OLED (4th-gen Tandem QD-OLED)QD-OLED
Refresh rate240 Hz240 Hz
Response time (grey to grey)0.03 ms0.03 ms
Brightness (typical)250 nits250 nits
HDR peak brightness1,000 nits–
HDR certificationDisplayHDR True Black 400DisplayHDR True Black 400
HDR formatsHDR10HDR10+ Gaming
Contrast ratio1,500,000:11,000,000:1
Colour range99% DCI-P3, 145% sRGB99% DCI-P3 (CIE 1976)
DCI-P3 coverage99%99%
ShapeFlatFlat
Adaptive syncFreeSync Premium Pro, G-Sync Compatible, VESA AdaptiveSyncFreeSync Premium Pro
Colour depth10-bit (1.07 billion colours)Up to 1 billion colours
sRGB coverage145%–
Colour accuracyΔE < 2; colour calibration report via DisplayWidget Center–
HDR detailHDR10; 1,000 cd/m² peakDisplayHDR True Black 400 and HDR10+ Gaming
Variable refresh range–Samsung's current UK specification confirms FreeSync Premium Pro but lists G-Sync as No; its March 2025 launch releases state NVIDIA G-SYNC Compatible support for G81SF
Motion blur reductionExtreme Low Motion Blur–
Viewing angles178° / 178° (CR ≥ 10)178° horizontal and vertical
Pixel pitch0.153 mm–
Eye careFlicker-free, OLED Anti-Flicker 2.0, TÜV Low Blue Light (hardware)Eye Saver Mode, Flicker Free and UL-certified Glare Free coating
Burn-in protectionASUS OLED Care Pro, custom heatsink, Neo Proximity SensorOLED Safeguard+ with pulsating heat pipe cooling; burn-in from normal use is covered within warranty, excluding commercial use, abuse and misuse
Calibration–Factory tuning with calibration report
Connections
Video inputs2 × HDMI 2.1, DisplayPort 1.4, USB-C2 × HDMI 2.1, DisplayPort 1.4
USB-C chargingUp to 90 WNone
USB ports3 × USB-A2 × USB-A
KVM switchYes–
EthernetNo–
SpeakersNoNo
HDMI detail2 x HDMI 2.1 (FRL)2 x HDMI 2.1, HDCP 2.2
DisplayPort detail1 x DisplayPort 1.4 with DSC1 x DisplayPort 1.4, HDCP 2.2
USB-C detail1 x USB-C with DisplayPort Alt Mode and 90 W Power Delivery–
USB hub detail3 x USB-A 3.2 Gen 1 (5 Gbps) downstream, 1 x USB-B upstreamOne USB-B upstream and two USB-A downstream ports; USB 3.2 Gen 1
Picture by picturePiP and PbPPicture in picture; no picture by picture (Stuff)
Audio outEarphone jackHeadphone output
Design
Stand adjustsHeight, tilt, swivel, pivotHeight, tilt, swivel, pivot
VESA mountYesYes
Weight with stand7.44 kg6.9 kg
Height adjustment0–120 mm120 mm, ± 5 mm tolerance
Tilt-5° to 20°-2° to +25°
Swivel-45° to 45°-30° to +30°
Pivot-90° to 90°-92° to +92°
VESA pattern100 x 100 mm100 x 100 mm
Size with stand610.3 x 389.4–509.4 x 168.7 mm (W x H x D)611.7 x 263.5 x 554.2 mm (W x D x H)
Size without stand610.3 x 369.2 x 66.5 mm (W x H x D)611.7 x 49.2 x 353.8 mm (W x D x H)
Weight without stand5.0 kg3.8 kg
Controls1/4-inch tripod socket on the stand, Aura Sync lighting–
ColoursBlackSilver with Core Lighting+
Power and support
Power useLess than 80 W on (200 nits), less than 0.5 W power saving, less than 0.3 W off45 W typical; 140 W maximum; 0.5 W standby; 0.3 W off
Energy class–G
Power supplyAC 100–240 V, 50/60 HzExternal adapter; AC 100–240V
SoftwareDisplayWidget CenterMonitor OSD; no Tizen smart services
CertificationsVESA DisplayHDR 400 True Black, VESA AdaptiveSync Display 240Hz, AMD FreeSync Premium Pro, G-SYNC Compatible, TÜV Flicker-free, TÜV Low Blue Light–
Warranty3 years, including panel burn-in–
In the boxDisplayPort cable, HDMI Ultra High Speed cable, USB-C cable, USB 3.2 cable, power cord, VESA mount kit, microfiber cloth, ROG pouchHDMI cable, DisplayPort cable and 1.5 m power cable

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