LG 40U990A – Price and Full Specifications

$2,399.00
SKU: 40U990A
Brand: lg
Category: Monitor
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Available Official

Display 39.7 in, IPS, 5120 x 2160 pixels
Refresh rate LM400RW2-SSA1
Dimensions 48 Hz - 120 Hz
Weight 929.28 x 392.04 x 106.3 mm (without stand)
Brightness: 9.2 kg (without stand)

Our Rating

The overall rating is based on review by our experts

Design 8 / 10
Display 8 / 10
HDR 8 / 10
Refresh Rate 8 / 10
Connectivity 8 / 10
Ergonomics 8 / 10

PROS

Ultra-wide 39.7" 5K2K (5120×2160) display – great for multitasking.
High brightness (600 nits peak) with HDR10 & DisplayHDR 600.
99% DCI-P3 color coverage – excellent for content creators.
Adjustable stand (height + tilt) and VESA mount support.
Thunderbolt 5.0 (in & out) – powerful connectivity for modern setups.

CONS

No built-in camera – less suited for video calls.
Limited to 120 Hz (not ideal for high-end competitive gaming).
IPS panel only 8-bit (no true 10-bit color).
No swivel or pivot adjustment.
Relatively heavy at 9.2 kg for wall/desk mounting.

Full Specifications

Basic Information

Brand	LG
Model	40U990A
Model Year	2025

Dimensions & Weight

Dimensions With Stand	947.7 x 484.3 x 260 mm
Dimensions Without Stand	947.7 x 392.04 x 106.3 mm
Weight	9.2 kg

Display

Size	39.7 in
Diagonal	1008.59 mm
Width	929.28 mm
Height	392.04 mm
Radius of curvature	2500 mm
Aspect Ratio	2.37:1
Panel Type	IPS
Resolution	5120 x 2160 pixels
Panel manufacturer	LG Display
Panel bit depth	8 bits
FRC	No
Coating	Anti-glare/Matte (3H)

Picture Quality

Backlight	Edge LED (Local Dimming)
Static contrast	2000 : 1
HDR Support	HDR10, DisplayHDR 600
Brightness	450 cd/m²
Peak Brightness	600 cd/m²
Pixel Density	140 ppi
Pixel Pitch	0.182 mm
Colors	16777216 colors, 24 bits
DCI-P3	99 %

Response Time & Input Lag

MIN Response Time	5 ms
MAX Response Time	-

Refresh Rate & VRR

Native Refresh Rate	48 Hz - 120 Hz
Maximum Refresh Rate	120 Hz
DSC	1 x DisplayPort 2.1 (UHBR20)
VRR Support	AMD Freesync Premium
VRR Range	48 Hz - 120 Hz

Ergonomics & Design

VESA Mount	Yes,100 x 100 mm
Removable stand	Yes
Height adjustment	Yes,130 mm
Landscape/portrait pivot	No
Left/right swivel	No
Forward/backward tilt	Yes,20 ° /20 °
Design Colors	White and Silver

Audio

Speakers

2 x 10 W
Rich Bass

Camera

Camera

Ports ,Connectivity & OS

USB	1 x USB 3.2 Type-C (Gen 2; 10 Gbps; upstream; data only)
HDMI	4 x USB 3.2 (Type-C; Gen 2; downstream)
Display Port	2 x USB 3.2 (Type-A; Gen 2; downstream)
Audio Port	1 x Thunderbolt 5.0 (out; 80 Gbps; 15W)
Other Connectivity	1 x Thunderbolt 5.0 (in; 80 Gbps; 96W)
Operating Systems	1 x Ethernet RJ45

Functional features

Gamming Features

3-sided virtually borderless design
AMD Freesync Premium
Ambient Light Sensor
Auto Input Switch
Backlight Sensor
Color Weakness Mode
Dual Controller
Flicker-free technology
IPS Black
KVM Switch
Low Blue Light
Picture-by-Picture
Picture-in-Picture
Reader Mode