LG Ultrafine evo 40U990A 40" 5K2K vs LG 45GX950A-B 45-inch Ultragear 5K2K WUHD — Head-to-Head (2026)

The specs side by side, with links to both product pages.

LG Ultrafine evo 40U990A 40" 5K2K (5120×2160) Curved Ultrawide Monitor | IPS Black, 120Hz, DisplayHDR 600, Thunderbolt 5, HDMI 2.1, DisplayPort 2.1, Built-in Speakers & Adjustable Stand - Bundle

Check price on Amazon

$1479.99

*Price sourced from Amazon.com. Last updated 2026-09-29. Price and availability subject to change.

Spec	LG Ultrafine evo 40U990A 40" 5K2K…	LG 45GX950A-B 45-inch Ultragear 5K2K…
Brand	LG	LG
Brightness	450 candela_per_square_meter	275 cd
Model Name	40U990A	45GX950A-B.AUS
Resolution	5K UHD 2160p Ultra Wide	5K UHD 2160p Ultra Wide
Screen Size	40 inches	44.5 inches
Aspect Ratio	21:9	21:9
Connectivity	USB-C	USB
Display Type	LCD	OLED
Model Number	40U990A-W.AUS_AG9_1	45GX950A-B.AUS
Refresh Rate	120 hertz	165 hertz
Adaptive Sync	FreeSync Premium	FreeSync Premium Pro, G-Sync Compatible
Response Time	5 milliseconds	0.03 milliseconds
Screen Finish	Glossy	Matte
Viewing Angle	178 degrees	178 degrees

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