LG
LG 34U640B 34-Inch UltraWide WQHD (3440 x 1440) Curved Monitor
Bottom line: The LG 34U640B 34-Inch UltraWide WQHD Curved Monitor is a specs-and-price decision rather than a crowd-consensus one in the gaming monitors category. Check the specification table below against one or two close alternatives — on price and spec fit, not on star ratings.
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Pros & Cons
Pros
- ✓ Backed by LG's warranty and support channels
Cons
- ✗ Check the listed dimensions, connectors and platform compatibility against your setup before ordering
- ✗ Price, stock, shipping and returns are set by the retailer and may have changed since this page was last updated
Manufacturer description
The LG 34U640B-B is a 34-inch curved UltraWide monitor that combines a spacious 3440 × 1440 WQHD resolution, a fast 144Hz refresh rate, and USB-C single-cable connectivity with 65W laptop charging — creating a versatile workstation display that's equally capable of powering productive multi-app workflows, delivering vivid color-accurate creative work, and providing smooth, immersive gaming from one sleek, narrow-bezel panel.The 21:9 UltraWide WQHD resolution gives you 33% more horizontal screen real estate than a standard 16:9 QHD monitor, letting you comfortably arrange three application…
SpecPicks Verdict
SpecPicks scored LG 34U640B 34-Inch UltraWide WQHD Curved Monitor using a rating × review-volume × price-fit model applied to published specs and reviews across the gaming monitors category. LG's gaming monitors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for gaming monitors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Key Features
- LG USA AUTHORIZED - Includes 26 Month Extended Protection in ADDITION to the Included Manufacturer Protection | 34-INCH ULTRAWIDE WQHD EXPERIENCE – Maximize productivity and immersion with a 34-inch UltraWide WQHD (3440 x 1440) curved monitor featuring a 21:9 aspect ratio and 1800R curvature. The spacious display provides 33% more screen space than standard QHD monitors, making multitasking, content creation, spreadsheets, and entertainment more efficient and engaging.
- 144HZ REFRESH RATE WITH HDR10 AND FREESYNC PREMIUM – Enjoy fluid visuals with a 144Hz refresh rate, 5ms response time, and AMD FreeSync Premium technology that helps reduce screen tearing and stuttering. The VA panel delivers a 4000:1 contrast ratio, HDR10 support, 99% sRGB, and 99% DCI-P3 color coverage for vibrant colors, deep blacks, and impressive detail across games, movies, and creative projects.
- SINGLE-CABLE USB-C WORKSTATION SOLUTION – Connect, charge, and transfer data through a single USB-C cable with up to 65W Power Delivery. Dual Controller (KVM) functionality allows control of two computers with one keyboard and mouse, while HDMI, DisplayPort, USB hub connectivity, and LG Split Screen software streamline multitasking. The ergonomic stand offers tilt and height adjustments for comfortable all-day use.
- INCLUDED IN THE BOX: LG 34U640B-B 34" UltraWide Curved Monitor (Black) | Stand (base + neck) | HDMI Cable | DisplayPort Cable | USB-C Cable | Power Cord / Adapter | Quick Setup Guide
- BUNDLE INCLUDES: Deco Essentials CPS 26 Months Extended Protection | Deco Essentials 6FT Universal 4K HDMI 2.0 Cable with 28AWG Pure Copper Conductors
Full Specifications
| Brand | LG |
|---|---|
| Color | Black |
| Shape | Curved |
| Voltage | 240 volts |
| Brightness | 300 candela_per_square_meter |
| Model Name | E990LG34U640B |
| Resolution | QHD Ultra Wide 1440p |
| Unit Count | 1 Count |
| Color Gamut | 99 |
| Pixel Pitch | 0.23 |
| Screen Size | 34 inches |
| Aspect Ratio | 21:9 |
| Connectivity | USB-C |
| Display Type | LCD |
| Model Number | E990LG34U640B |
| Refresh Rate | 144 hertz |
| Adaptive Sync | FreeSync Premium |
| Mounting Type | Wall Mount |
| Response Time | 5 milliseconds |
| Screen Finish | Matte |
| Full listing title | LG 34U640B 34-Inch UltraWide WQHD (3440 x 1440) Curved Monitor, Black Bundle with Deco Essential CPS 26 Month Protection Pack and 2X Deco Essentials 6FT 4K HDMI 2.0 Cable |
Ready to buy?
LG 34U640B 34-Inch UltraWide WQHD (3440 x 1440) Curved Monitor, Black Bundle with Deco Essential CPS 26 Month Protection Pack and 2X Deco Essentials 6FT 4K HDMI 2.0 Cable is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
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