LG Ultragear 27GX790B-B vs MSI MAG 321UP QD-OLED Monitor Comparison

LG Ultragear 27GX790B-B and MSI MAG 321UP QD-OLED are both monitors with the same Aspect Ratio (16:9), Viewing Angle (178° H x 178° V) and DisplayPort (1). The main differences are in Screen Size, Resolution, Pixel Density and Dot Pitch.

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LG Ultragear 27GX790B-B	MSI MAG 321UP QD-OLED
Prices (Change region) In Stock $994.99 Last updated 21 minutes ago. In Stock Free shipping $999.99 In Stock $999.99 In Stock $999.99 In Stock Free shipping $999.99 Show 2 more offers	Prices (Change region) In Stock Free shipping $699.99 In Stock Free shipping $749.99 In Stock Free shipping $749.99 In Stock $899.00 Out of Stock $899.00 - Buy now Show 3 more offers
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Brand LG	Brand MSI
Model 27GX790B-B	Model MAG 321UP QD-OLED
Release Date 📅 December 2025	Release Date 📅 July 2024
* 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 31.5"
Resolution 2560 x 1440	Resolution 3840 x 2160
Pixel Density 108.79 PPI	Pixel Density 139.87 PPI
Dot Pitch 0.23 mm	Dot Pitch 0.18 mm
Panel Type WOLED Tandem	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
Brightness 335 cd/m²	Brightness 1000 cd/m²
Response Time 0.02 ms	Response Time 0.03 ms
Refresh Rate 540 Hz	Refresh Rate 165 Hz
Built-in Speakers No	Built-in Speakers No
DVI 0	DVI 0
DisplayPort 1	DisplayPort 1
HDMI 2	HDMI 2
VGA 0	VGA 0
G-SYNC Support Yes	G-SYNC Support No
FreeSync Support Yes	FreeSync Support Yes