AOC B3 CU34B3E 34″ 120Hz Monitor

34 inch · 3440 x 1440 · 120 Hz · VA

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Screen size 34 inch
Resolution 3440 x 1440
Refresh rate 120 Hz
Panel VA
Response time 4 ms

AOC B3 CU34B3E 34″ 120Hz Monitor is a 34-inch monitor with 3440 x 1440 resolution, a 120 Hz refresh rate and VA panel. Fine for work and everyday use; for fast shooters look at 144 Hz and up. It came out in 2025.

Released: 2025-11-22

Specifications

Key specs

Screen size: 34 inch
Resolution: 3440 x 1440
Refresh rate: 120 Hz
Panel: VA
Response time: 4 ms
Released: 2025-11-22
Part number: CU34B3E
EAN / UPC: 4038986113250

Display

Display diagonal: 86.4 cm (34")
Display resolution: 3440 x 1440 pixels
HD type: Wide Quad HD
Native aspect ratio: 21:9
Display technology: LED
Panel type: VA
LED backlight: Yes
Backlight type: W-LED
Display brightness (typical): 300 cd/m²
Response time: 4 ms
Response time measurement type: GTG (Gray to Gray)
Response time (MPRT): 1 ms
Screen shape: Curved
Screen curvature rating: 1500R
Contrast ratio (typical): 3500:1
Contrast ratio (dynamic): 50000000:1
Maximum refresh rate: 120 Hz
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 1.073 billion colours
Pixel pitch: 0.23175 x 0.23175 mm
Horizontal scan range: 30 - 190 kHz
Vertical scan range: 48 - 120 Hz
Viewable size, horizontal: 79.7 cm
Viewable size, vertical: 33.4 cm
Display diagonal (metric): 86.36 cm
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: High Dynamic Range 10 (HDR10)
DDC/CI: Yes
Surface hardness: 3H
sRGB coverage (typical): 114.7%
Adobe RGB coverage: 98.3%
DCI-P3 coverage: 91.3%

Performance

VESA Adaptive Sync support: Yes
Flicker-free technology: Yes

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Design

Market positioning: Office
Product colour: Black
Frameless design: Yes
Front bezel colour: Black
Detachable stand: Yes

Ports & interfaces

HDMI: Yes
HDMI ports quantity: 1
HDMI version: 2.0
DisplayPorts quantity: 1
DisplayPort version: 1.4
Audio output: Yes
Headphone out: Yes
Headphone outputs: 1

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Tilt adjustment: Yes
Tilt angle range: -5 - 20°
Picture-in-Picture: Yes
On Screen Display (OSD): Yes
On Screen Display (OSD) languages: Simplified Chinese, Traditional Chinese, Czech, Dutch, English, Finnish, French, German, Italian, Japanese, Korean, Croatian, Polish, Portuguese, Russian, Spanish, Swedish, Turkish, Ukrainian

Power

Energy efficiency class (SDR): F
Energy efficiency class (HDR): G
Energy consumption (SDR) per 1000 hours: 31 kWh
Energy consumption (HDR) per 1000 hours: 46 kWh
Power consumption (typical): 31 W
Power consumption (standby): 0.3 W
Power consumption (max): 53 W
Power consumption (off): 0.3 W
AC input voltage: 100 - 240 V
AC input frequency: 50/60 Hz
Input current: 1.5 A
Power supply type: Internal
Energy efficiency scale: A to G

Operational conditions

Operating temperature (T-T): 0 - 40 °C
Storage temperature (T-T): -25 - 55 °C
Operating relative humidity (H-H): 10 - 85%
Storage relative humidity (H-H): 5 - 93%
Operating altitude: 0 - 5000 m
Non-operating altitude: 0 - 12192 m

Weight & dimensions

Width (with stand): 808.1 mm
Depth (with stand): 265.3 mm
Height (with stand): 476.7 mm
Weight (with stand): 7.4 kg
Width (without stand): 368.4 mm
Depth (without stand): 109 mm
Height (without stand): 368.4 mm
Weight (without stand): 6.3 kg

Other features

Warranty period: 3 year(s)
Bezel thickness type: Frameless
Compliance certificates: CE
Certification: RoHs compliant,FCC

Technical details

Native refresh rate: 60 Hz

Check the manufacturer's page before buying.

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About this product

Immersive ultrawide clarity with fluid performance and curved comfort The CU34B3E elevates your workflow with its expansive 34" WQHD ultrawide display, offering exceptional clarity and a wider field of view for seamless multitasking. Its curved design enhances visual comfort, drawing you deeper into your content. With a fast 120Hz refresh rate and 1ms response time, every motion appears smoother and more responsive—perfect for both productivity and entertainment. Adaptive Sync ensures a tear-free visual experience, making this monitor a versatile addition to any modern workspace.

User manual (PDF)

CU34B3E vs similar monitors

	AOC B3 CU34B3E 34″ 120Hz Monitor	AOC CU34E4CW/75 34″ 120Hz Monitor	AOC CU34E4C 34″ 120Hz Monitor	Lenovo L34W-4C 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	120 Hz	120 Hz	120 Hz	120 Hz
Panel	VA	VA	VA	VA
Response time	4 ms	4 ms	4 ms	4 ms
Released	2025	2026	2026	2026