LG 34U640B-B 34″ 144Hz Monitor

34 inch · 3440 x 1440 · 144 Hz · VA

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Screen size 34 inch
Resolution 3440 x 1440
Refresh rate 144 Hz
Panel VA
Response time 5 ms

LG 34U640B-B 34″ 144Hz Monitor is a 34-inch monitor with 3440 x 1440 resolution, a 144 Hz refresh rate and VA panel. The high refresh rate makes fast games look smoother. It came out in 2026.

Released: 2026-04-09

Specifications

Key specs

Screen size: 34 inch
Resolution: 3440 x 1440
Refresh rate: 144 Hz
Panel: VA
Response time: 5 ms
Released: 2026-04-09
Part number: 34U640B-B.AEU
EAN / UPC: 8806096743171

Display

Display diagonal: 86.4 cm (34")
Display resolution: 3440 x 1440 pixels
HD type: Wide Quad HD
Native aspect ratio: 21:9
Panel type: VA
Display brightness (typical): 300 cd/m²
Response time: 5 ms
Screen shape: Curved
Screen curvature rating: 1800R
Contrast ratio (typical): 4000:1
Maximum refresh rate: 144 Hz
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 1.07 billion colours
Pixel pitch: 0.23175 x 0.23175 mm
Pixel density: 110 ppi
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: HDR Effect, High Dynamic Range 10 (HDR10)
Colour gamut standard: sRGB
Colour gamut: 99%

Performance

AMD FreeSync: Yes
AMD FreeSync type: FreeSync Premium
Flicker-free technology: Yes
Game mode: Yes

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Design

Product colour: Black

Ports & interfaces

Built-in USB hub: Yes
HDMI: Yes
HDMI ports quantity: 2
HDMI version: 2.0
DisplayPorts quantity: 1
DisplayPort out version: 1.4
Headphone out: Yes

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Height adjustment: Yes
Tilt adjustment: Yes
Picture-in-Picture: Yes

Power

Energy efficiency class (SDR): F
Energy efficiency class (HDR): G
Energy consumption (SDR) per 1000 hours: 30 kWh
Energy consumption (HDR) per 1000 hours: 39 kWh
Power consumption (standby): 0.5 W
Power consumption (off): 0.3 W
AC input voltage: 100 - 240 V
Power supply type: External
Energy efficiency scale: A to G

Weight & dimensions

Width (with stand): 810.3 mm
Depth (with stand): 221 mm
Height (with stand): 464.8 mm
Weight (with stand): 7.71 kg
Width (without stand): 810.3 mm
Depth (without stand): 91.4 mm
Height (without stand): 358.1 mm
Weight (without stand): 5.58 kg

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34U640B-B vs similar monitors

	LG 34U640B-B 34″ 144Hz Monitor	LG 34U620B-B 34″ 144Hz Monitor	LG 34 Inch UltraWide WQHD 144Hz HDR10 Curved Computer Monitor with AMD FreeSync Premium	LG UltraWide U6 34U640B-B.AEK, 34-inch WQHD Curved (1800R) 144Hz Monitor
Screen size	34 inch	34 inch	34 inch	34 inch
Resolution	3440 x 1440	3440 x 1440	3440 x 1440	3440 x 1440
Refresh rate	144 Hz	144 Hz	144 Hz	144 Hz
Panel	VA	VA	VA	VA
Response time	5 ms	5 ms	5 ms	5 ms
Released	2026	2026	2026	2026