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LG 27U631A-B 27" specifications and in-depth review

LG 27U631A-B 27"

Manufacturer: LG

The LG 27U631A-B is a 27-inch standard desktop monitor built around an IPS panel with LED backlighting. It targets users who need accurate color reproduction, offering 99% sRGB coverage alongside a wide 178-degree viewing angle both horizontally and vertically. The glossy panel finish and 16.7 million displayable colors make it a straightforward choice for everyday display use, while its support for portrait mode and VESA mounting adds some flexibility in how it can be positioned or mounted.

On the technical side, the display runs at a native resolution of 2560 x 1440 pixels across its 27-inch screen, yielding a pixel density of 108 ppi. The refresh rate reaches 100Hz with a 5ms response time, and brightness is rated at 250 nits with a contrast ratio of 1000:1. Connectivity includes one HDMI port, one USB Type-C port, and a single additional USB port, though there is no DisplayPort, VGA, or audio jack present. The monitor weighs 4,400 grams and measures 613mm wide by 362mm tall with a depth of 43mm, and standby power draw sits at 0.5W.

Pros
  • The IPS panel delivers wide 178-degree viewing angles both horizontally and vertically, keeping colors consistent across a broad range of positions
  • 99% sRGB coverage combined with 8-bit color depth and support for color calibration makes color output reliable for color-sensitive work
  • Portrait mode and VESA mount support provide meaningful flexibility in how the display can be physically set up or repositioned
  • A 100Hz refresh rate offers smoother motion than standard 60Hz monitors without requiring adaptive sync hardware
  • Standby power draw is a low 0.5W, reducing idle energy use
Cons
  • The glossy panel with no anti-glare coating can cause noticeable reflections in bright or mixed-lighting environments
  • No adaptive synchronization technology is present, which may result in screen tearing during fast-moving content
  • Connectivity is limited to a single HDMI port, one USB Type-C, and one USB port, with no DisplayPort, VGA, or audio jack available
  • There are no built-in speakers, meaning a separate audio solution is always required
  • The stand lacks a swivel function, restricting horizontal adjustment without physically moving the monitor
  • No ambient light sensor means brightness cannot automatically adapt to changing room conditions
Who is this for?

This monitor is well suited to users who prioritize color accuracy in their daily work, such as those handling photo editing, graphic design, or content review, thanks to its 99% sRGB coverage, color calibration support, and 8-bit IPS panel. The wide 178-degree viewing angles make it practical for shared workspaces or setups where the screen is viewed from slightly off-center. Users who need flexible mounting or display orientation will also find it accommodating, given its VESA mount compatibility and portrait mode support, while the 100Hz refresh rate offers a smoother experience for general productivity and light multimedia use.

Who is this NOT for?

Users who require competitive or fast-paced gaming performance will find this monitor limiting, as it lacks adaptive synchronization technology, which can lead to screen tearing, and its 5ms response time is not optimized for high-action scenarios. The glossy panel without any anti-glare coating makes it a poor fit for brightly lit rooms or environments with strong ambient light sources, where reflections can significantly hinder visibility. Additionally, those needing a richer connectivity setup — such as multiple video inputs, a DisplayPort connection, or a built-in audio jack — will find the limited port selection restrictive for more complex desk configurations.

Display:

Display type LED-backlit, LCD, IPS
response time 5 ms
screen size 27"
resolution 2560 x 1440 px
pixel density 108 ppi
Adaptive synchronization None
has anti-glare coating ✕
refresh rate 100Hz
maximum horizontal viewing angle 178º
maximum vertical viewing angle 178º
has a matte panel ✕
has a glossy panel ✓
has a touch screen ✕

The LG 27U631A-B features a 27-inch LED-backlit LCD panel using IPS technology, delivering a 2560 x 1440 pixel resolution at a pixel density of 108 ppi. The display runs at a refresh rate of 100Hz with a 5ms response time, and its IPS panel provides wide viewing angles of 178 degrees both horizontally and vertically. The screen has a glossy finish without an anti-glare coating, and no adaptive synchronization technology is supported. It is not a touch screen, and no matte panel treatment is applied.

General info:

Type Standard
supports total tilt ✓
Has a swivel stand ✕
Supports VESA mount ✓
height 362 mm
width 613 mm
thickness 43 mm
weight 4400 g
supports portrait mode ✓
volume 9541.958 cm³

This is a standard-type monitor measuring 613mm wide, 362mm tall, and 43mm thick, with a total volume of 9541.958 cm³ and a weight of 4400 grams. The stand supports tilt adjustment and portrait mode rotation, though it does not include a swivel function. VESA mount compatibility is supported, giving users the option to attach the display to a third-party arm or wall bracket if preferred.

Colors:

brightness (typical) 250 nits
supports color calibration ✓
display colors 16.7 million
bit depth 8-bit
contrast ratio 1000:1
sRGB coverage 99%

The display operates at a typical brightness of 250 nits with a contrast ratio of 1000:1, and renders colors through an 8-bit panel capable of showing 16.7 million colors. sRGB coverage reaches 99%, making the color output fairly complete within that color space. Color calibration is also supported, allowing for adjustments to color accuracy when needed.

Connectivity:

HDMI ports 1
supports Thunderbolt ✕
DisplayPort outputs 0
has a socket for a 3.5 mm audio jack ✕
has a DVI connector ✕
USB ports 1
Has USB Type-C ✓
supports Ethernet ✕
supports Wi-Fi ✕
has AirPlay ✕
mini DisplayPort outputs 0
has a VGA connector ✕

Connectivity on this monitor is relatively minimal, consisting of one HDMI port, one USB Type-C port, and a single additional USB port. There are no DisplayPort or mini DisplayPort outputs, and legacy video interfaces such as VGA and DVI are absent. Wireless options are not available either, as the monitor does not support Wi-Fi, Ethernet, or AirPlay, and Thunderbolt is not supported. There is also no 3.5mm audio jack present.

Power:

standby power consumption 0.5W

The only power specification available for this monitor is its standby power consumption of 0.5W, indicating a low draw when the display is in standby mode.

Features:

has PiP ✕
has stereo speakers ✕
has built-in smart TV ✕
has a remote control ✕
supports Dolby Digital ✕
supports Dolby Digital Plus ✕
has DTS Surround ✕
has an ambient light sensor ✕
has a front camera ✕

This monitor does not include any of the additional features covered in this section. There are no built-in speakers, no Picture-in-Picture support, and no remote control. Audio enhancement technologies such as Dolby Digital, Dolby Digital Plus, and DTS Surround are all absent. The monitor also lacks a front camera, an ambient light sensor, and built-in smart TV functionality.

Final Verdict

The LG 27U631A-B is a straightforward 27-inch IPS monitor that earns its place in productivity-focused and color-sensitive workflows, largely due to its 99% sRGB coverage with color calibration support and wide viewing angles that hold up well across varied setups. The 100Hz refresh rate and portrait mode compatibility add a layer of practicality beyond basic office use, while VESA mount support gives it meaningful placement flexibility. That said, the absence of adaptive sync, a glossy panel prone to reflections, and a limited port selection mean it is best suited to controlled environments and straightforward single-source setups rather than gaming rigs or complex multi-device workstations. Overall, the LG 27U631A-B is a solid, no-frills display for users whose priority is reliable color reproduction and a stable everyday workspace.