LG 34U640B-B.AUS Review: Curved UltraWide with KVM and USB-C Power Delivery
The LG 34U640B-B.AUS is a 34-inch curved QHD monitor that excels as a productivity hub, offering seamless connectivity, dual-PC control, and a high refresh rate for fluid visuals.
By Elvis Dicki
Updated October 21, 2026
The LG 34U640B-B.AUS is a 34-inch curved UltraWide monitor designed to transform a desktop into an expansive, efficient workspace. It targets professionals, content creators, and multitaskers who need ample screen real estate to view multiple applications simultaneously without the clutter of multiple displays. With its combination of a high refresh rate, comprehensive connectivity, and unique software-driven features, this monitor aims to be a versatile centerpiece for both work and media consumption. The bottom line: it is a strong contender for users seeking a single, wide-screen solution to boost productivity and streamline their setup.
This model stands out by integrating a KVM switch and USB-C with power delivery, allowing users to control two computers with one set of peripherals and charge a laptop through a single cable. The subtle 1800R curve and adjustable ergonomic stand are built for comfort during long sessions. While not aimed at hardcore gamers or color-critical professional work, its 144Hz refresh rate and AMD FreeSync Premium support provide smooth performance for everyday tasks, video calls, and light gaming. This review analyzes its specifications, design, and user feedback to determine where it fits in the competitive monitor market.
LG 34U640B-B 34 Inch UltraWide Curved QHD 144Hz
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LG 34U640B-B.AUS at a Glance
| Spec | Value |
|---|---|
| Screen Size & Aspect Ratio | 34-inch, 21:9 |
| Native Resolution | 3440 x 1440 (UltraWide QHD) |
| Panel Type & Refresh Rate | VA, 144Hz |
| Key Connectivity | USB-C with 65W PD, 2x HDMI, DisplayPort, 2x USB 3.0 |
| Key Features | KVM Switch, AMD FreeSync Premium, HDR10, Reader Mode |
| Color Coverage | Up to 99% sRGB |
| Ergonomics | Height & Tilt Adjustable Stand, VESA Mount Compatible |
| Curvature | 1800R |
| Brightness | 300 cd/m² |
| Warranty | 1 Year Manufacturer |
Design and Build
The LG 34U640B-B.AUS presents a modern, professional aesthetic with a three-side virtually borderless design that maximizes the screen area. The subtle 1800R curvature is a defining characteristic, engineered to match the natural field of view for reduced eye strain and a more immersive experience during extended use. The monitor is not listed as having a metal construction, but it features a solid, square-based stand that is designed to save desk space. The build quality, as indicated by user reviews, appears robust, with the monitor arriving well-packaged.
Ergonomics are a strong point, with the included stand offering both height and tilt adjustment, allowing users to easily find a comfortable viewing position. For those preferring an even cleaner desk setup, the monitor is VESA mount compatible (100mm x 100mm), as confirmed by a user who paired it with a wall-mount arm. The overall footprint and the curved, matte-finish screen contribute to a workspace that feels open and organized, aligning with LG’s goal of reducing visual distraction.
Performance and Features
Display Quality and Visual Performance
The 34-inch UltraWide QHD (3440 x 1440) VA panel provides significant screen real estate, effectively allowing multiple full-size windows to be viewed side-by-side. The 144Hz refresh rate and 5ms response time are notable for a productivity-focused monitor, contributing to noticeably smooth motion in video calls, streaming content, and casual gaming. AMD FreeSync Premium technology is included to reduce screen tearing and stutter during compatible gameplay. The display offers up to 99% coverage of the sRGB color space and supports HDR10, which is sufficient for general content creation and media consumption, though it is not tailored for wide-gamut professional color work.
Connectivity and Ports
Connectivity is a major highlight. The USB Type-C port is a central hub, supporting display signal, data transfer, and up to 65W of power delivery to compatible laptops, dramatically simplifying cable management. The monitor also provides two HDMI ports, one DisplayPort, and two USB 3.0 downstream ports for peripherals. This array makes it easy to connect multiple source devices, such as a work laptop and a personal desktop, simultaneously.
Key Productivity Features
The integrated KVM (Keyboard, Video, Mouse) switch functionality is a standout productivity feature. It enables control of two connected computers using the single monitor, one keyboard, and one mouse, with the ability to switch between systems and even drag-and-drop files between them. This eliminates the need for external KVM hardware. Furthermore, LG provides the Switch application, which allows users to customize the UltraWide screen by splitting it into up to six different sections or layouts for multitasking, accessible via hotkeys. It is important to note that software installation is required to use the Switch app and the full KVM drag-and-drop functionality.
Comfort and Usability Features
For user comfort, LG includes Reader Mode, which reduces blue light emission by shifting the color temperature to warmer tones, aimed at making long reading or browsing sessions easier on the eyes. The monitor’s specifications list a viewing angle of 178 degrees, which is typical for VA panels, ensuring consistent colors when viewed from the side.
Setup, Support and Ownership
Setup is described as straightforward, with the monitor supporting one-click mounting to its stand. The package includes the necessary cables for immediate use: DisplayPort, HDMI, USB-C, and a power cable. To unlock the full potential of features like the screen partitioning and advanced KVM file transfer, users must download and install LG’s Switch software from the company’s support website. This adds a step but provides significant added functionality.
LG backs the 34U640B-B.AUS with a one-year manufacturer warranty. For ongoing support, users can visit LG’s official support page for drivers, software, and documentation. There is no specific data provided regarding firmware update processes or long-term software support cycles. The monitor’s power consumption is rated at 45 watts, and it includes standard wall-mount capability for those seeking alternative mounting solutions beyond the included stand.
What Owners Say
Owner feedback for the LG 34U640B-B.AUS is generally very positive, reflected in its high average rating where the majority of reviews are five-star. Users frequently praise the monitor’s sharp text, great colors, and the substantial increase in productive screen space. Several reviews highlight the excellent out-of-the-box color accuracy and brightness, with one user noting it appeared brighter and more color-accurate than a competing Dell UltraWide model. The high refresh rate via DisplayPort is also appreciated.
Positive comments often mention the monitor living up to or exceeding expectations, with specific callouts for its performance as a replacement for other problematic displays. There are minimal critical remarks in the provided excerpts, though the rating distribution shows a small percentage of one-star reviews, the reasons for which are not detailed in the provided data. Overall, the consensus from buyers indicates satisfaction with the monitor’s value, visual performance, and build quality.
Pros and Cons
Pros
- Comprehensive USB-C connectivity with 65W laptop charging
- Integrated KVM switch for dual-computer control
- High 144Hz refresh rate for smooth everyday motion
- Ergonomic stand with height and tilt adjustment
- Useful screen partitioning via the Switch app
- Spacious 34-inch UltraWide QHD curved display
Cons
- Requires software installation for full feature set
- Color gamut limited to sRGB, not for wide-gamut pro work
- Curved screen may not suit all users or precise design tasks
- HDR10 support is basic due to peak brightness limitations
- Some features like drag-and-drop KVM rely on software
Who Should Buy It (and Who Should Skip It)
The LG 34U640B-B.AUS is an ideal choice for professionals, remote workers, and multitaskers who manage multiple applications or even two separate computers. Its UltraWide screen, KVM functionality, and single-cable USB-C solution make it perfect for decluttering a home office or workstation. Content consumers and those who enjoy casual gaming will also benefit from the immersive curve and smooth 144Hz performance. It is well-suited for general content creation where 99% sRGB coverage is adequate.
This monitor is not the best fit for users who require a perfectly flat screen for graphic design, CAD work, or other tasks demanding absolute geometric linearity. Professional color graders needing Adobe RGB or DCI-P3 wide gamut support should look elsewhere. While it supports high refresh rates, competitive esports gamers might prioritize monitors with faster IPS or TN panels and higher refresh rates. For more options in this category, explore our guides on the best ultra-wide monitors and best ultra-wide curved monitors.
Final Verdict
The LG 34U640B-B.AUS successfully delivers on its promise as a productivity-focused UltraWide monitor. Its strengths are clear: the seamless integration of a KVM switch and powerful USB-C connectivity solves real-world desk clutter and workflow problems. The 144Hz VA panel provides a smooth and engaging viewing experience that goes beyond standard 60Hz office monitors, making it versatile for both work and leisure. The ergonomic design and useful software features like the Switch app add significant value for the target user.
While it makes some compromises, such as the color gamut coverage and the need for software to enable advanced features, these are reasonable given its positioning and likely use cases. When compared to OLED or high-end IPS alternatives, it offers a balanced package at a more accessible point. For anyone seeking a single, large, curved display to enhance multitasking and simplify a multi-device setup, the LG 34U640B-B.AUS is a compelling and well-executed option. You can find more detailed tech gear analysis in our Tech Gear section.
FAQs
Does the KVM switch work without installing software?
Basic KVM functionality, allowing you to switch the monitor, keyboard, and mouse control between two connected computers, works through the monitor’s on-screen display menu. However, the advanced feature of dragging and dropping files between the two connected systems requires the installation of LG’s Switch software on both computers.
Can this monitor charge a MacBook Pro via USB-C?
The monitor’s USB-C port provides up to 65 watts of power delivery. This is sufficient to charge many modern laptops, including various models of the MacBook Pro, while also transmitting the display signal and data. You should verify your specific laptop’s power requirements to ensure compatibility.
Is the 144Hz refresh rate available over HDMI?
The manufacturer notes that actual refresh rates may vary depending on computer graphics specifications and configurations. While the monitor has a native 144Hz capability, achieving the maximum refresh rate may depend on using the DisplayPort connection and having a compatible graphics card. The product description emphasizes smooth 144Hz visuals, with a footnote suggesting users check their hardware compatibility.
Is this monitor good for photo or video editing?
It can be good for general photo and video editing due to its high resolution and up to 99% sRGB color coverage, which is the standard for web content. However, for professional editing work that requires precise color accuracy in wider gamuts like Adobe RGB or DCI-P3, this monitor may not provide the necessary color space coverage. The HDR10 support is also a basic implementation.
About the author
Elvis Dicki writes reviews and buying guides for CyberSecLabs.