Compare Monitors

Compare Samsung C49RG90S vs ASUS ROG Strix OLED XG27UCDMG

Samsung C49RG90S and ASUS ROG Strix OLED XG27UCDMG are both monitors with the same 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 C49RG90S

ASUS ROG Strix OLED XG27UCDMG

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Brand

SAMSUNG

Brand

ASUS

Model

LC49RG90SSNXZA

Model

90LM0B20-B01971
XG27UCDMG
ROG Strix OLED XG27UCDMG
90LM0B20-B019B1

Release Date

📅 June 2019

Release Date

📅 August 2025

* First availability for purchase, it may not correspond to the actual market launch date.

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Screen Size

49"

Screen Size

26.5"

Resolution

5120 x 1440

Resolution

3840 x 2160

Pixel Density

108.54 PPI

Pixel Density

166.26 PPI

Dot Pitch

0.23 mm

Dot Pitch

0.15 mm

Panel Type

VA

Panel Type

QD-OLED

Widescreen

Yes

Widescreen

Yes

Aspect Ratio

32:9

Aspect Ratio

16:9

Curved Screen

Yes

Curved Screen

No

Viewing Angle

178° H x 178° V

Viewing Angle

178° H x 178° V

Brightness

600 cd/m²

Brightness

1000 cd/m²

Contrast Ratio

3,000:1 (Typ)

Contrast Ratio

-

Response Time

4 ms

Response Time

0.03 ms

Refresh Rate

120 Hz

Refresh Rate

240 Hz

Built-in Speakers

No

Built-in Speakers

No

DVI

0

DVI

0

DisplayPort

2

DisplayPort

1

HDMI

1

HDMI

2

VGA

0

VGA

0

G-SYNC Support

No

G-SYNC Support

Yes

FreeSync Support

Yes

FreeSync Support

Yes

Options (2)

	QLED, 240Hz $899.99
	Mini-LED, 240Hz $1,099.99

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Comparison and key differences summary

Reasons to buy the Samsung C49RG90S:

6% cheaper, you can save $49.01
Bigger screen size (+22.50")
Curved screen
+1 Display Port

Reasons to buy the ASUS ROG Strix OLED XG27UCDMG:

Newer Product, it was released around 6 years later
Higher Screen Resolution (3840 x 2160 pixel)
Better pixel density (166.26 PPI)
More brightness (+400 cd/m²)
Less response time (-3.97 ms)
Higher refresh rate (240 Hz)
Flat screen
+1 Ports HDMI
Supports NVIDIA G-Sync

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