Samsung S27E390H vs ASUS ROG Strix OLED XG27UCDMG Monitor Comparison

Samsung S27E390H and ASUS ROG Strix OLED XG27UCDMG are both monitors with the same Aspect Ratio (16:9) and Viewing Angle (178° H x 178° V). The main differences are in Screen Size, Resolution, Pixel Density and Dot Pitch.

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Samsung S27E390H	ASUS ROG Strix OLED XG27UCDMG
Prices (Change region) - Buy now	Prices (Change region) In Stock $799.00 Last updated 21 minutes ago. In Stock Free shipping $799.00 In Stock $849.99 In Stock $979.00 In Stock Free shipping $984.99 Show 2 more offers
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Pangoly Score (How do we rate?) 82	Pangoly Score (How do we rate?) -
Brand Samsung	Brand ASUS
Model S27E390H	Model 90LM0B20-B01971 XG27UCDMG ROG Strix OLED XG27UCDMG 90LM0B20-B019B1
Release Date 📅 May 2015	Release Date 📅 August 2025
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews Add a product review	User reviews Add a product review
Price history View Details ►	Price history View Details ►
Screen Size 27"	Screen Size 26.5"
Resolution 1920 x 1080	Resolution 3840 x 2160
Pixel Density 81.59 PPI	Pixel Density 166.26 PPI
Dot Pitch 0.31 mm	Dot Pitch 0.15 mm
Panel Type PLS	Panel Type QD-OLED
Widescreen Yes	Widescreen Yes
Aspect Ratio 16:9	Aspect Ratio 16:9
Curved Screen No	Curved Screen No
Viewing Angle 178° H x 178° V	Viewing Angle 178° H x 178° V
Display Colors 16700000	Display Colors -
Brightness 300 cd/m²	Brightness 1000 cd/m²
Contrast Ratio DCR Mega Infinity (1000:1)	Contrast Ratio -
Response Time 4 ms	Response Time 0.03 ms
Refresh Rate 60 Hz	Refresh Rate 240 Hz
Built-in Speakers No	Built-in Speakers No
DVI 0	DVI 0
DisplayPort 0	DisplayPort 1
HDMI 1	HDMI 2
VGA 1	VGA 0
G-SYNC Support No	G-SYNC Support Yes
FreeSync Support No	FreeSync Support Yes
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