34″ LG 34U640B – Specs & Features
LG ● Monitor ●
At a glance
The LG 34U640B is a 34-inch UWQHD Monitor designed for gaming and multimedia. It features a VA panel for deep blacks and strong contrast. The Monitor is suitable for gaming and creative work and includes 48Hz – 144Hz refresh rate and DisplayPort/USB-C connectivity. However, it may not be ideal for no swivel support. It scores Great — 8.2/10 across our display performance benchmarks.
- VA panel offers superior contrast ratios over IPS but narrower colour accuracy at wide viewing angles.
Model Year
2026
Size Class
34"
Panel Type
VA
Scores and analysis are based on DisplayInput – Monitor & TV Specs Comparison's display benchmark methodology across 6 verified specifications. Data sourced from LG's official specifications and independent lab measurements.
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Display Performance
Overall Score
Combined display quality score
82
/100
Refresh Rate
Higher is smoother — 144Hz+ ideal for gaming
60
/100
Response Time
Lower is better — 1ms GtG excellent
40
/100
Colour Coverage
% of DCI-P3 colour gamut — 90%+ for professional work
99
/100
Brightness
Panel brightness in nits — 1000+ for strong HDR
30
/100
The LG 34U640B achieves an overall display score of 8.2/10. With a 144Hz refresh rate and 5ms response time, it delivers excellent motion clarity for gaming and fast-paced content. Wide colour gamut is suitable for creative work. Typical brightness of 300 nits is adequate for indoor use.
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Who Should Buy the LG 34U640B
Perfect For
🎮
PC Gamers 144Hz
Fluid motion 60Hz cannot match
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Multitaskers & Cinephiles 21:9
Two apps open, full width, no compromise
🎨
Photo Editors & Colour Graders 99% P3
Screen colours match print and web export
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Dark-Scene & Movie Viewers VA Panel
Deep contrast without the LCD grey cast
Not Ideal For
✨
HDR Enthusiasts No HDR
No certified HDR. Streaming HDR-flagged content will be downgraded to SDR automatically.
💻
Single-Cable Laptop Users No USB-C
No USB-C port means separate video and power cables are needed for a laptop. No single-cable docking possible.
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Quick Advice: Buy this for
144Hz UWQHD gaming and daily use.
At 144Hz, UWQHD and pixel density, this is a strong all-rounder. If your workflow is purely creative rather than gaming, a 60Hz wide-gamut panel offers better colour at lower cost.
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Real-World Use Cases
🎮
Motion stays sharp through fast camera pans
144Hz keeps enemies mid-sprint clear, not blurred. FreeSync Premium maintains smooth output when frame rate fluctuates.
🗂️
Two full-width apps with no compromise
21:9 runs both windows at near-full width — no layout squeeze on either side.
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Films fill the screen edge to edge
21:9 content plays native — zero letterboxing, wider FOV in compatible games.
🖌️
What you grade is what the client receives
99% DCI-P3 keeps profiles consistent from Lightroom to print export.
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Deep contrast makes dark scenes genuinely dark
VA contrast keeps shadows dark without crushing detail. Native ratio: 4000:1. Dim-room streaming gains real depth.
Each scenario is derived from confirmed LG 34U640B specs. Real-world results vary with system configuration and content source.
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Pros & Cons
Pros
- Ultrawide 21:9 display
- High contrast VA panel
- USB-C with 65W power delivery
Cons
- No swivel support
- Average brightness
We identified 3 advantages and 2 limitations for the LG 34U640B. The strengths meaningfully outweigh the trade-offs for the target use case. All 5 points are derived from verified specifications and independently confirmed benchmark data.
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Score & Ratings
8.2/10
Great
The LG 34U640B earns a strong overall score of 8.2/10. Our editors evaluate each Monitor across display quality, colour accuracy, motion performance, and connectivity.
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Basic Information
5
| Specification | Value | 💡 What It Means |
|---|---|---|
| Brand | LG | |
| Model | 34U640B | |
| Series | UltraWide | |
| Model Alias | 34U640B-B | |
| Model Year | 2026 |
✓ Good 2026 — current generation. Latest panel technology and features.
|
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Display
8
| Specification | Value | 💡 What It Means |
|---|---|---|
| Size Class | 34-inch |
✓ Good 34" — popular desktop size. Enough space for multitasking without head movement.
|
| Panel Type | VA |
✓ Good VA — higher native contrast than IPS. Dark scenes look genuinely black; ideal for movies in dim rooms.
|
| Curvature | 1800R |
△ Average 1800R curve — subtle. Mostly cosmetic; minimal immersive benefit.
|
| Resolution | 3440 x 1440 |
✓ Good QHD (2560×1440) — noticeably sharper than 1080p on 27"+ screens. Sweet spot for productivity and gaming.
|
| Aspect Ratio | 21:9 |
✓ Good 21:9 ultrawide — run two full-width apps side by side. 21:9 movies play with no letterboxing.
|
| Pixel Density | 109 PPI |
△ Average 109 PPI — adequate sharpness for monitor use. Comfortable for text and media at 50–80cm.
|
| Pixel Pitch | 0.232 mm |
✓ Good 0.232 mm pitch — fine. Comfortable sharpness at desk viewing distances.
|
| Display Area | - |
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Color & HDR
5
| Specification | Value | 💡 What It Means |
|---|---|---|
| Color Depth | 10-bit (8-bit + FRC) |
✓ Good 10-bit — 1.07 billion colours. Eliminates colour banding in HDR skies, skin tones and gradients.
|
| Colors | 1.07 Billion | |
| sRGB | 99% |
✓ Good 99% sRGB — virtually complete coverage. Colour output matches what clients and printers receive exactly.
|
| DCI-P3 Coverage | - |
DCI-P3 coverage not published by the manufacturer for this model.
|
| HDR Support | HDR10 |
△ Average HDR10 — universal HDR baseline. Supported by all streaming services, games, and HDR discs.
|
☀️
Brightness & Contrast
3
| Specification | Value | 💡 What It Means |
|---|---|---|
| Brightness (Typical) | 300 cd/m² |
△ Average 300 cd/m² — comfortable indoors. May wash out next to a bright window or in direct sunlight.
|
| Peak Brightness | - |
OLED brightness varies per pixel and scene. Manufacturers often omit a fixed nit figure; contrast quality exceeds most LED panels anyway.
|
| Contrast | 4000:1 |
✓ Good 4000:1 — excellent shadow detail. Noticeably better than IPS in dark room viewing.
|
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Performance
3
| Specification | Value | 💡 What It Means |
|---|---|---|
| Refresh Rate | 48Hz – 144Hz |
✓ Good 144Hz — clear upgrade over 60Hz. Games feel noticeably more fluid in every genre.
|
| Response Time | 5 ms |
△ Average 5 ms — acceptable for office and casual gaming. Some blur visible in very fast scenes.
|
| Adaptive Sync | AMD FreeSync Premium |
✓ Good FreeSync Premium — tear-free gaming with LFC (prevents judder below minimum Hz). Works on AMD and NVIDIA GPUs.
|
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Display Technologies
1
| Specification | Value | 💡 What It Means |
|---|---|---|
| Advanced Display Technologies | W-LED backlight HDR Effect Flicker-free Low Blue Light |
Summary of enhanced display technologies applied to this panel.
|
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Camera
1
| Specification | Value | 💡 What It Means |
|---|---|---|
| Camera | No |
⚠ Limited No built-in camera. An external webcam is needed for video calls.
|
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Audio
1
| Specification | Value | 💡 What It Means |
|---|---|---|
| Audio | - |
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Connectivity & Ports
2
| Specification | Value | 💡 What It Means |
|---|---|---|
| Ports | USB-C (65W, DP Alt Mode) 2 x USB-A 3.2 2 x HDMI 2.0 DisplayPort 1.4 3.5 mm Audio Out HDCP 2.2 |
✓ Good USB-C (single-cable display + data, charging if PD supported). HDMI 2.0 — 4K@60Hz max bandwidth. DisplayPort 1.4 — full bandwidth for high-refresh PC gaming.
|
| Wireless | - |
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Ergonomics
6
| Specification | Value | 💡 What It Means |
|---|---|---|
| VESA Mount | 100 x 100 mm |
✓ Good VESA-compatible — fits any standard monitor arm, desk mount, or wall bracket. No proprietary hardware needed.
|
| Height Adjustment | 80 mm |
✓ Good 80 mm height adjustment — good range for most users.
|
| Pivot | No |
⚠ Limited No pivot — cannot rotate to portrait orientation.
|
| Swivel | No |
⚠ Limited No swivel — stand cannot rotate left/right. Adjust by moving the whole monitor.
|
| Tilt | -5° to +15° |
✓ Good Tilt ±5° — adjustable screen angle reduces neck strain and matches your eye level.
|
| Removable Stand | Yes |
✓ Good Stand detaches cleanly from the panel — mount on any VESA arm or wall bracket without a leftover collar.
|
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Gaming Features
1
| Specification | Value | 💡 What It Means |
|---|---|---|
| Gaming Features | FreeSync Premium Black Stabilizer Dynamic Action Sync |
✓ Good AMD FreeSync (tear-free).
|
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Smart & Software Features
2
| Specification | Value | 💡 What It Means |
|---|---|---|
| Operating System | - |
No smart OS — this is a PC monitor. All input comes from connected computers or consoles.
|
| Smart Features | Picture-by-Picture Picture-in-Picture KVM Switch Dual Controller |
✓ Good Picture-by-Picture
Picture-in-Picture
KVM Switch
Dual Controller — software features including OSD controls and display calibration tools.
|
⚡
Power Consumption
5
| Specification | Value | 💡 What It Means |
|---|---|---|
| Voltage | 100–240V |
✓ Good Universal or wide-range power supply. Compatible with outlets in the US, UK, EU, and most countries.
|
| Frequency | 50–60Hz |
50/60Hz AC supply — compatible with worldwide power grids including US, UK, EU, and AU.
|
| Average Consumption | 45W |
✓ Good 45W — efficient for a display of this size and capability.
|
| Maximum Consumption | - |
Peak power draw not published. Typically 2–3× the average consumption figure.
|
| Standby | 0.3W |
✓ Good 0.3W standby — near-zero idle power. Excellent energy compliance.
|
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Certificates
1
| Specification | Value | 💡 What It Means |
|---|---|---|
| Certificates | CE FCC-B RoHS UL |
✓ Good RoHS — EU hazardous substances compliant. CE — meets EU safety & electromagnetic standards. FCC — US electromagnetic compatibility certified.
|
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Design, Build & Dimensions
9
| Specification | Value | 💡 What It Means |
|---|---|---|
| Without Stand Width | 809 mm |
Panel dimensions without stand attached. Use for wall-mount space planning.
|
| Without Stand Height | 359 mm |
Panel dimensions without stand attached. Use for wall-mount space planning.
|
| Without Stand Depth | 92 mm |
Panel dimensions without stand attached. Use for wall-mount space planning.
|
| Without Stand Weight | 5.6 kg |
△ Average 5.6 kg — standard weight for this panel size.
|
| With Stand Width | 809 mm |
Overall footprint with stand. Use when planning desk or shelf placement.
|
| With Stand Height | 384 mm |
Overall footprint with stand. Use when planning desk or shelf placement.
|
| With Stand Depth | 220 mm |
Overall footprint with stand. Use when planning desk or shelf placement.
|
| With Stand Weight | 7.7 kg |
△ Average 7.7 kg — standard weight for this panel size.
|
| Color | Black |
Available colour finish for this unit.
|
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Operating Conditions
2
| Specification | Value | 💡 What It Means |
|---|---|---|
| Temperature | 0°C – 40°C |
Operating environment range. Keep within these limits for reliable long-term performance.
|
| Humidity | 10% – 80% |
Operating environment range. Keep within these limits for reliable long-term performance.
|
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Frequently Asked Questions
01 What type of panel does the LG 34U640B use? ›
The LG 34U640B uses a VA (VA) panel. VA panels produce deeper blacks and higher native contrast than IPS — best for movie watching in dim rooms. Viewing angles are narrower than IPS but colour stays consistent straight-on.
02 Can the LG 34U640B handle gaming? ›
✓ Yes — the 144Hz refresh rate makes fast-paced titles noticeably smoother than 60Hz. Fast camera pans and character movement stay sharp. 5ms response time minimises ghosting. FreeSync Premium support prevents tearing without V-Sync input lag.
03 Is the LG 34U640B suitable for photo or video editing? ›
✓ Yes — 99% DCI-P3 coverage means the colours you grade in Lightroom or DaVinci Resolve stay consistent when exported to screen and print. Suitable for professional colour work without a dedicated calibration monitor.
04 Who is the LG 34U640B best for? ›
It is best suited for gamers, content creators, multitaskers. Check the "Who Should Buy" section above for a full profile breakdown.
05 What is the benefit of the 21:9 ultrawide format? ›
21:9 lets you run two full-width applications side-by-side — browser and spreadsheet, or code editor and documentation — without either window being squeezed. Compatible games and 21:9 films also fill the screen with no black bars.
06 Is the LG 34U640B worth buying in 2026? ›
LG 34U640B remains a strong option in 2026. 144Hz refresh keeps motion smooth for gaming, which remains relevant as 144Hz+ is now the expected baseline. Wide colour gamut coverage remains relevant for photo, video, and content creation workflows. Our benchmark score of 8.2/10 puts it in the top tier of its category. Before purchasing, compare the current street price against newer models at the same price point to confirm it offers the best value for your use case.
Questions are generated from LG 34U640B specifications. For full technical data, see the Specifications tab above.
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Reviews
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