27 Inch UltraGear™ IPS QHD 1440p 300Hz 1ms NVIDIA G-Sync Compatible Gaming Monitor

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LG 27G640A-B 27 Monitor – Front View
LG 27G640A-B 27 Monitor – Side Angle Left
LG 27G640A-B 27 Monitor – Side Angle Right
LG 27G640A-B 27 Monitor – Back View with Ports
LG 27G640A-B 27 Monitor – Front View

27 Inch UltraGear™ IPS QHD 1440p 300Hz 1ms NVIDIA G-Sync Compatible Gaming Monitor

27G640A-B

Key features

  • 27" QHD IPS display delivers sharp detail, rich color, and wide viewing angles
  • An ultra-smooth 300Hz refresh rate and 1ms response keeps fast-paced gameplay sharp and fluid¹
  • Up to 95% DCI-P3 color and VESA HDR400 bring games to life in stunning detail
  • Seamless frame sync with FreeSync™ Premium and G-Sync® Compatibility for stutter-free gaming²
  • Narrow-bezel, "L" designed stand with height, tilt, swivel and pivot adjustments
  • Built-in speakers provide deep, powerful sound that elevate gameplay
Specifications
  • Picture Quality
  • Special Features
  • Input/Output
  • Stand
  • Sound
  • Power
  • Dimensions/Weights
  • Cabinet/Accessories
  • Warranty
  • See All
    • Picture Quality
    Color Depth (Number of Colors)
    1.07B
    Native Resolution
    QHD (2560 x 1440)
    Aspect Ratio
    16:9
    Brightness (Typical, Minimum)
    (Typ.) 400 cd/m² (Min.) 320 cd/m²
    Color Gamut (Typ.)
    DCI P3 95% (CIE1976)
    Contrast Ratio
    1300:1 (Typ.)
    Display Type
    IPS
    Pixel Pitch (mm)
    0.2328 x 0.2328
    Refresh Rate
    300Hz
    Resolution
    QHD
    Response Time (GTG)
    1ms (GtG at Faster)
    Screen Size
    27"
    Viewing Angle
    178º(R/L), 178º(U/D)
    Picture Quality
    Color Depth (Number of Colors)
    1.07B
    Native Resolution
    QHD (2560 x 1440)
    Aspect Ratio
    16:9
    Brightness (Typical, Minimum)
    (Typ.) 400 cd/m² (Min.) 320 cd/m²
    Color Gamut (Typ.)
    DCI P3 95% (CIE1976)
    Contrast Ratio
    1300:1 (Typ.)
    Display Type
    IPS
    Pixel Pitch (mm)
    0.2328 x 0.2328
    Refresh Rate
    300Hz
    Resolution
    QHD
    Response Time (GTG)
    1ms (GtG at Faster)
    Screen Size
    27"
    Viewing Angle
    178º(R/L), 178º(U/D)
    Special Features
    NVIDIA G-Sync™ Compatible
    Yes
    AMD FreeSync
    Yes
    AMD FreeSync Premium
    Yes
    VRR
    Yes
    LG Switch
    Yes
    Headphone 3-Pole
    Yes
    Auto Input Switch
    Yes
    Black Stabilizer®
    Yes
    Color Weakness Mode
    Yes
    Crosshair®
    Yes
    Dynamic Action Sync®
    Yes
    Factory Calibration
    Yes
    Flicker Safe
    Yes
    FPS Counter
    Yes
    HDR Effect
    Yes
    HDR10
    Yes
    Reader Mode
    Yes
    Smart Energy Saving
    Yes
    User Define Key
    Yes
    VESA DisplayHDR™
    DisplayHDR™ 400
    Input/Output
    USB Down-stream
    YES(2ea/ver3.0)
    DisplayPort
    1
    USB Up-stream
    YES(1ea/ver3.0)
    USB Type-C
    1
    HDMI
    2
    HDMI Version 2.1
    Yes
    DisplayPort Version 1.4
    Yes
    DP Version
    1.4
    Headphone Out
    Yes
    USB-C (Data Transmission)
    Yes
    USB-C (Power Delivery)
    15 W
    Stand
    Display Position Adjustments
    Tilt/Height/Swivel/Pivot
    Wall Mount Size (mm)
    100 x 100
    Sound
    Speaker
    Yes
    Power
    DC Off (Max)
    Less than 0.3W
    Input
    100~240V (50/60Hz)
    Power Save/Sleep Mode (Max)
    Less than 0.5W
    Type
    External Power(Adapter)
    Dimensions/Weights
    Shipping Dimensions (WxHxD)
    31.9" × 6.5" × 18.3"
    Shipping Weight
    16.3 lbs
    With Stand (WxHxD)
    24.2" × 21.2" × 9.4" (Up) 24.2" × 15.3" × 9.4" (Down)
    With Stand Weight
    12.1 lbs
    Without Stand (WxHxD)
    24.2" × 14.4" × 2.3"
    Without Stand Weight
    7.5 lbs
    Cabinet/Accessories
    Display Port Cable
    Yes
    HDMI Cable
    Yes
    Warranty
    Country of origin
    Vietnam
    Limited Warranty
    1 Year Parts and Labor
    UPC
    195174133330
    Features

    Blazing Speed. Brilliant Color. Total Control.

    Dominate the game with a 27" QHD IPS display built for speed, clarity, and precision. Enjoy ultra-smooth action with 300Hz/1ms (GtG), vibrant HDR visuals, and tear-free gameplay—plus pro-level adjustments and versatile ports for your perfect setup.

    Blazing Speed. Brilliant Color. Total Control.

    27" QHD IPS Clarity

    Enjoy crisp, detailed visuals with QHD (2560x1440) resolution on a vibrant 27" IPS display. Wide viewing angles keep colors vivid from any position, so every scene stays crisp and vibrant.

    27" QHD IPS Clarity

    300Hz Refresh Rate for the Win

    React faster and play smoother with a blistering 300Hz refresh rate—perfect for high-speed competitive gaming where every millisecond counts. Experience fluid motion and razor-sharp clarity, even in the most intense action.1

    300Hz Refresh Rate for the Win

    1ms (GtG): Astounding Gaming Speed

    Play with a near-instantaneous 1ms response time, which minimizes ghosting for gaming visuals that are sharp, clear and buttery smooth.

    1ms (GtG): Astounding Gaming Speed

    Vivid Color and HDR Brilliance

    Immerse yourself in lifelike visuals with up to 95% DCI-P3 color gamut and VESA DisplayHDR™ 400. Enjoy rich hues, bright highlights, and deep dark shadows that make every game more vibrant and every scene more cinematic.

    Vivid Color and HDR Brilliance

    Ultimate Frame Sync: FreeSync™ Premium & G-SYNC® Compatible

    Say goodbye to screen tearing and stutter. With AMD FreeSync™ Premium and NVIDIA® G-SYNC® compatibility, this UltraGear™ monitor delivers ultra-smooth, tear-free visuals, giving you perfect frame sync across PC and next-gen console gaming.2

    Ultimate Frame Sync: FreeSync™ Premium & G-SYNC® Compatible

    Seamless Display, and Adjustable to Gamer Specs

    Dive into gameplay on the narrow-bezeled 27” screen. The slim-profile display has adjustable height, tilt, swivel and pivot controls that let you customize your view.

    Seamless Display, and Adjustable to Gamer Specs

    Serious Connectivity for Serious Gamers

    Connect your way with USB Type-C (15W power delivery), dual HDMI 2.1 ports, and DisplayPort 1.4. Enjoy smoother gameplay, vivid colors, and high-resolution graphics—plus the convenience of powering devices while you play or work.

    Serious Connectivity for Serious Gamers

    Unlock Your Potential with Advanced Gaming Features

    Dynamic Action Sync reduces input lag for real-time response.

    Black Stabilizer brightens dark scenes to see what's hidden

    FPS Counter shows your real-time frame rate

    Crosshair enhances precision for deadly accuracy

    Unlock Your Potential with Advanced Gaming Features
    For owners
    Warranty Information
    Register Your Product
    Other Support Options
    Manuals and Downloads
    Help Library
    Request a Repair

    1Graphics card that supports DisplayPort 1.4 or HDMI 2.1 are required to achieve up to 300Hz fresh rate support. Graphics card sold separately.

    2NVIDIA® G-SYNC® Compatible supports variable refresh rate on GeForce GTX 10 Series and higher GPUs on Display Port, and GeForce RTX 30 Series and higher GPUs on HDMI 2.1.


    Images may be simulated and dramatized for illustrative purposes. Actual features, functionality, and other product specifications may differ and are subject to change without notice. Prices, promotions, and availability may vary by model, store, and online. Prices subject to change without notice. Quantities are limited. Check with your local retailers for their final price and availability.

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