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Compare AOC Q2778VQE vs ASUS ROG Strix OLED XG27UCDMG

AOC Q2778VQE and ASUS ROG Strix OLED XG27UCDMG are both monitors with the same Aspect Ratio (16:9) and DisplayPort (1). The main differences are in Screen Size, Resolution, Pixel Density and Dot Pitch.

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AOC Q2778VQE

ASUS ROG Strix OLED XG27UCDMG

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Brand

AOC

Brand

ASUS

Model

Q2778VQE

Model

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

Release Date

📅 September 2018

Release Date

📅 August 2025

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

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Screen Size

27"

Screen Size

26.5"

Resolution

2560 x 1440

Resolution

3840 x 2160

Pixel Density

108.79 PPI

Pixel Density

166.26 PPI

Dot Pitch

0.23 mm

Dot Pitch

0.15 mm

Panel Type

TN

Panel Type

QD-OLED

Widescreen

Yes

Widescreen

Yes

Aspect Ratio

16:9

Aspect Ratio

16:9

Curved Screen

No

Curved Screen

No

Viewing Angle

170° H x 160° V

Viewing Angle

178° H x 178° V

Display Colors

16700000

Display Colors

-

Brightness

350 cd/m²

Brightness

1000 cd/m²

Contrast Ratio

80,000,000:1

Contrast Ratio

-

Response Time

1 ms

Response Time

0.03 ms

Refresh Rate

60 Hz

Refresh Rate

240 Hz

Built-in Speakers

No

Built-in Speakers

No

DVI

1

DVI

0

DisplayPort

1

DisplayPort

1

HDMI

1

HDMI

2

VGA

1

VGA

0

G-SYNC Support

No

G-SYNC Support

Yes

FreeSync Support

No

FreeSync Support

Yes

Options (1)

AOC Q3279VWFD8 31.5"

32 inch IPS Panel

-

Comparison and key differences summary

Reasons to buy the AOC Q2778VQE:

Bigger screen size (+0.50")
+1 Ports DVI
+1 Ports VGA

Reasons to buy the ASUS ROG Strix OLED XG27UCDMG:

Newer Product, it was released around 7 years later
Higher Screen Resolution (3840 x 2160 pixel)
Better pixel density (166.26 PPI)
More brightness (+650 cd/m²)
Less response time (-0.97 ms)
Higher refresh rate (240 Hz)
Better viewing angle
+1 Ports HDMI
Supports NVIDIA G-Sync
Supports AMD FreeSync

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