Display
34 in, VA, 3440 × 1440
34
Refresh Rate
48–144 Hz
48
Brightness
300 nits
Contrast Ratio
4000:1
4000
Overview
The LG UltraWide 34U620B sits in a useful middle ground between an office ultrawide and a gaming display. Its 34-inch 3440 × 1440 VA panel is curved at 1800R, reaches 144 Hz and carries a 4000:1 static contrast rating. That combination should make it feel responsive in everyday use while giving dark scenes more depth than a typical IPS monitor. Colour output is listed as 10-bit through 8-bit plus FRC, with 99% sRGB coverage and factory calibration. FreeSync Premium, Picture-by-Picture and Picture-in-Picture broaden its appeal for mixed work and entertainment. Connectivity is conventional rather than modern: two HDMI 2.0 ports, DisplayPort 1.4 and a 3.5 mm output, with no USB-C connection. The stand offers 80 mm height adjustment and tilt but no swivel or pivot. HDR10 is supported, although 300 nits brightness and no stated peak output keep HDR expectations modest. For users who want width, contrast and 144 Hz without paying for OLED, the 34U620B has a clear role.
BrandLG UltraWidePanel34-inch 1800R VAResolution3440 × 1440Refresh Rate48–144 HzColour Depth10-bit via 8-bit + FRC
Key Highlights
- 144 Hz curved ultrawide panel
- 4000:1 static contrast
- 99% sRGB with factory calibration listed
- Picture-by-Picture and Picture-in-Picture
- Two HDMI 2.0 ports plus DisplayPort 1.4
Who Should Buy the LG 34U620B
+ Best For
Users splitting time between productivity and gaming
Dark-room games and films where VA contrast helps
Multi-input desks with two HDMI devices
Wide creative and office timelines
× Not Ideal For
Single-cable USB-C laptop setups
Competitive players demanding sub-1 ms OLED motion
Colour workflows needing documented wide-gamut coverage
Strong HDR presentation
Display Performance
Resolution
3440 × 1440 at 109 ppi
Detailed ultrawide workspace
Refresh Rate
48–144 Hz
Good balance for work and gaming
Response Time
5 ms minimum
Mainstream rather than competitive
Brightness
300 nits
Suitable for indoor rooms
Contrast
4000:1
A notable VA strength
Colour
10-bit via FRC, 99% sRGB
Smooth gradients within the standard gamut
Gaming Performance
Refresh Rate144 HzSmooth enough for most mainstream gaming
Adaptive SyncFreeSync PremiumHelps with variable frame rates
Contrast4000:1Gives dark scenes stronger depth
Gaming ToolsBlack Stabilizer, Crosshair and Dynamic Action SyncUseful LG overlays
HDR & Brightness Reality
HDR10 is supported, but the published brightness is 300 nits with no peak measurement or local-dimming specification. The 4000:1 VA contrast is helpful, yet the monitor should still be treated as SDR-first with basic HDR playback.
Connectivity & Ports
HDMI2× HDMI 2.0Flexible for PC and console use
DisplayPort1× DisplayPort 1.4Best desktop connection
Audio3.5 mm outputNo internal speaker specification
USB-CNot listedNo video, data or charging through one cable
Desk Fit & Ergonomics
Height Adjustment80 mmModest vertical range
Tilt5° forward / 15° backwardStandard adjustment
SwivelNoStand does not rotate sideways
PivotNoUltrawide landscape use only
VESA100 × 100 mmArm mounting remains an option
Real-World Use Cases
useful for spreadsheets and parallel windows
144 Hz and FreeSync Premium suit varied genres
VA contrast supports darker scenes
two HDMI ports plus DisplayPort simplify switching
Pros & Cons
Pros
- 144 Hz ultrawide performance
- Strong 4000:1 contrast
- 10-bit output via FRC
- Two HDMI ports and DisplayPort
- PbP and PiP support
Cons
- No USB-C connectivity
- Only 300-nit brightness
- Basic HDR capability
- No swivel or pivot
- 5 ms response-time claim
Score & Ratings
7.8/10
Great
Model Information
11
| Specification | Value |
|---|---|
| Brand | LG |
| Series | UltraWide |
| Model | 34U620B |
| Model Alias | 34U620B-B |
| Full Product Name | LG UltraWide 34U620B |
| Model Year | 2026 |
| Monitor Type | UltraWide Monitor |
| Region / Variant | US / Japan |
| Launch Status | Available |
| Available Colors | Black |
| Warranty | 1 year (US) |
Display & Panel
14
| Specification | Value |
|---|---|
| Screen Size | 34 in |
| Exact Diagonal | 34.14 in |
| Screen Shape | Curved |
| Radius of Curvature | 1800R |
| Screen Format | UltraWide |
| Aspect Ratio | 2.389:1 |
| Active Display Width | 797.22 mm |
| Active Display Height | 333.72 mm |
| Display Area | 91.6% |
| Panel Type | VA |
| Backlight Type | W-LED |
| 3D Support | No |
| Screen Coating | Anti-glare/Matte |
| Coating Hardness | 3H |
Resolution & Pixel Details
4
| Specification | Value |
|---|---|
| Native Resolution | 3440 × 1440 |
| Resolution Name | WQHD |
| Pixel Density | 109 ppi |
| Pixel Pitch | 0.232 mm |
Picture Quality & Color
9
| Specification | Value |
|---|---|
| Panel Bit Depth | 10-bit (8-bit + FRC) |
| FRC | Yes |
| Display Colors | 1.07 billion |
| Total Color Bits | 30-bit |
| Typical Brightness | 300 nits |
| HDR Support | Yes |
| HDR Formats | HDR10 |
| sRGB Coverage | 99% |
| Factory Calibration | Yes |
Refresh Rate, Response & Gaming
8
| Specification | Value |
|---|---|
| Refresh Rate Range | 48–144 Hz |
| Minimum Response Time | 5 ms |
| AMD FreeSync | Premium |
| Black Stabilizer | Yes |
| Crosshair | Yes |
| Dynamic Action Sync | Yes |
| Picture-by-Picture | Yes |
| Picture-in-Picture | Yes |
Ports & Connectivity
8
| Specification | Value |
|---|---|
| HDMI Ports | 2× HDMI 2.0 |
| HDMI Version | HDMI 2.0 |
| DisplayPort Input | 1× DisplayPort 1.4 |
| DisplayPort Version | DisplayPort 1.4 |
| HDCP Support | Yes |
| HDCP Version | HDCP 2.2 |
| KVM Switch | Yes |
| Audio Output | 3.5 mm |
Audio, Camera, Network & Smart Features
1
| Specification | Value |
|---|---|
| Built-In Camera | No |
Ergonomics & Stand
9
| Specification | Value |
|---|---|
| VESA Mount | Yes |
| Removable Stand | Yes |
| Height Adjustment | Yes |
| Height Adjustment Range | 80 mm |
| Tilt Adjustment | Yes |
| Forward Tilt | 5° |
| Backward Tilt | 15° |
| Swivel Adjustment | No |
| Pivot Adjustment | No |
Dimensions, Weight & Design
4
| Specification | Value |
|---|---|
| Weight With Stand | 7.7 kg |
| Weight Without Stand | 5.6 kg |
| Stand Depth | 220 mm |
| Bezel Design | 3-sided frameless design |
Power & Operating Conditions
10
| Specification | Value |
|---|---|
| 110V Input Range | 100–120V |
| 220V Input Range | 220–240V |
| AC Frequency | 50–60 Hz |
| Average Power Consumption | 45 W |
| Sleep Consumption | 0.8 W |
| Off Consumption | 0.3 W |
| Operating Temperature | 0–40°C |
| Operating Humidity | 10–80% |
| Storage Temperature | -20–60°C |
| Storage Humidity | 5–85% |
Eye Care, Protection & Additional Features
6
| Specification | Value |
|---|---|
| Flicker-Free | Yes |
| Reader Mode | Yes |
| Monitor Management Software | LG Switch |
| Auto Input Switching | Yes |
| Smart Energy Saving | Yes |
| Additional Monitor Features | Color WeaknessDual ControllerHDR EffectSuper Resolution+ |
Certifications, Standards & Licenses
7
| Specification | Value |
|---|---|
| RoHS | Compliant |
| CE | Certified |
| FCC-B | Certified |
| J-Moss | Compliant |
| PSE | Certified |
| UL | UL (cUL) |
| TÜV Type Approval | TÜV Type |
Included Accessories
2
| Specification | Value |
|---|---|
| HDMI Cable | Included |
| DisplayPort Cable | Included |
Packaging Information
4
| Specification | Value |
|---|---|
| Package Width | 986 mm |
| Package Height | 470 mm |
| Package Depth | 188 mm |
| Package Weight | 10.4 kg |
Frequently Asked Questions
01 What is the main advantage over a 120 Hz ultrawide? +
The 144 Hz ceiling provides slightly smoother motion and more headroom for gaming.
02 Is the panel true native 10-bit? +
The supplied specification says 10-bit output using an 8-bit panel plus FRC.
03 Does it include USB-C? +
No USB-C connection is listed.
04 Can it show two sources at once? +
Picture-by-Picture and Picture-in-Picture are both listed.
05 How adjustable is the stand? +
It provides 80 mm height adjustment and tilt, but no swivel or pivot.
Reviews
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT
SHEET № 34U620B