Key Features
Readers' Choice best monitor lineup for gamers and those demanding high-quality performance
UltraGear™ OLED GX7 Logo image.
LG UltraGear 27GX790B gaming monitor displayed on a raised platform with a high-speed light trail graphic shown on screen. The floor projection reads ‘4th Gen OLED,’ emphasizing the OLED generation of the product.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
A composite promotional graphic for LG OLED technology featuring five sections: ‘LG’s Brightest OLED’ with an RGB beam graphic, ‘Perfect Visual Experience’ with an astronaut character and certification icons, a split gaming scene labeled ‘QHD 540Hz – HD 720Hz Dual-Mode,’ a purple-blue gradient panel displaying ‘VESA DisplayHDR True Black 500,’ and a colourful particle burst with the text ‘DCI-P3 99.5%
The word 'DISPLAY' in large gradient letters centered on a dark background with a thin outlined box extending from the left.
Introducing LG’s gaming monitor powered by 4th Gen OLED with revolutionary Primary RGB Tandem technology—reaching up to 1500 nits of peak brightness for visibly clearer gameplay, helping you to see on-screen visuals with clarity even in bright environments. In fast-paced or sunlit in-game scenes, enhanced APL and reduced ABL help maintain consistent luminance without dimming critical visuals. UL Verified Perfect Black, colour and VESA DisplayHDR™ True Black 500, this next-gen OLED delivers the contrast and clarity gamers need to react faster, see more, and stay immersed in every frame.
LG UltraGear 27GX790B monitor placed on a desk overlooking a cityscape at sunset, displaying a fantasy game scene with a cloaked character standing in a snowy mountain environment. Surrounding the monitor are speakers, a keyboard, a clock, small figurines, and a mug
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*As of November 2025, among all LG models using WOLED prior to 4th Gen. OLED, 27GX790B offers the highest brightness.
Powered by 4th Gen Primary RGB Tandem OLED, the 27GX790B delivers brighter visuals with less power than the previous 3rd Gen OLEDs—reaching up to 1500 nits of peak brightness. Its advanced 4-stack RGB structure produces deeper contrast, sharper detail, and stunning colour precision. Experience clearer shadows, deep immersion, and visual consistency in every frame—built for serious gaming.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Perfect Black is UL-verified and delivers true black levels to enhance perceived brightness and contrast, whether it's bright or dark around you.
Perfect Colour and 100% Colour Fidelity deliver accurate colour expression even under varying lighting conditions, from low light to bright ambient environments.
UL-verified Perfect Reproduction delivers that actual game content is faithfully rendered on screen, maintaining intended colour and detail in both dark and bright environments. Unlike static image-based metrics, this certification reflects real-world content reproduction accuracy.
Three certification labels highlighting LG OLED's performance: UL verified black levels below 0.24 nit up to 500 lux, UL verified colour consistency over 99% up to 500 lux, and Intertek certification for 100% colour fidelity up to 500 lux based on 125 colour patterns.
Side-by-side comparison of non-WOLED and 4th Gen. WOLED display quality, showing enhanced brightness, colour, and clarity on the right side using 4th Gen. WOLED technology. The monitor sits on a desk with a game controller, keyboard, and headset.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Experience unparalleled depth and vibrant realism with VESA DisplayHDR™ True Black 500, delivering detailed black expression even in the darkest scenes. With DCI-P3 99.5% (Typ.) colour gamut, the monitor provides that colours are displayed with realistic detail, as close to the original intent as possible.
Deeper Detail with VESA DisplayHDR™ True Black 500
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Featuring AGLR(Anti-glare and low reflection), LG WOLED’s UL-verified advanced eye comfort technologies minimize frustrating reflections and keep your eyes comfortable, delivering crystal-clear gaming performance with consistent clarity. With UL verifications in key areas—limiting harmful blue light exposure and preventing distractions from flickering lights—these technologies promote visual comfort and contribute to a smoother gaming experience, whether you’re gaming in bright environments or LED-lit rooms.
LG UltraGear 27GX790B monitor on a desk setup displaying a side-by-side comparison labeled ‘non-applied’ and ‘applied,’ showing different visual states of a sci-fi armored character. The desk includes speakers, a keyboard, figurines, a controller, a PC tower, and headphones. Along the bottom are multiple UL certification badges for flicker-free, discomfort glare-free, low blue light, and Eyesafe credentials
*All pictures shown are simulated for illustration purpose only.
*LG WOLED have been verified as Flicker-Free, Discomfort Glare Free, and Low Blue Light by UL.
*Certificate Number: Flicker-Free Display (OLED) - A196009, Discomfort Glare Free - V563481 (conditions of UGR less than 22), Low Blue Light Hardware Solution Platinum - V745051, Eyesafe 3.0 CPF60 - V745354, Eyesafe 3.0 RPF40 - V275741
*The above feature may vary depending on the user’s computing environment or conditions.
The word 'SPEED' in large gradient letters centered on a dark background with a thin outlined box extending from the left.
With VESA Certified Dual-Mode, enjoy UltraGear’s fastest performance with up to 720Hz—the highest refresh rate ever introduced. Seamlessly switch between QHD 540Hz for detailed visuals and HD 720Hz for ultra-fast action. Choose your preferred refresh rate and screen size via On-Screen Display, or toggle instantly through LG Switch for optimized gameplay across every genre.
Graphic comparing two gaming scenes: a fantasy warrior rendered in QHD at 540Hz on the left, and a rally race car rendered in HD at 720Hz on the right. The two scenes overlap slightly against a dynamic abstract blue and red background, with ‘540Hz QHD’ and ‘720Hz HD’ labels displayed beside each image
The latest DisplayPort 2.1 on the 27GX790B delivers next-generation bandwidth optimized for ultra-high-speed gaming, supporting stable performance even at extreme refresh rates. Extending this connectivity, the USB-C port supports streamlined single-cable display output and data transfer—ideal for modern setups that require flexibility without extra clutter. Completing the configuration, dual HDMI 2.1 ports can provide smooth compatibility with the latest consoles and gaming PCs, creating a fully integrated high-performance environment across devices.
High-speed bandwidth by DisplayPort 2.1
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*DP, HDMI cables are included in the package.
*The graphics card is NOT included in the package.
The ultra-fast 0.02 response time (GtG), reducing reverse ghosting and providing fast response time, lets you to enjoy a whole new gaming performance.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
The word 'TECHNOLOGY' in large gradient letters centered on a dark background with a thin outlined box extending from the left.
Powered by AMD FreeSync™ Premium Pro, NVIDIA-validated G-SYNC® compatibility, and VESA AdaptiveSync™ certification, this monitor provides tear-free, ultra-smooth visuals and low latency, delivering unmatched gaming precision and fluidity.
Comparison of fluid gaming image - The left image is tearing, and the Right image is tear-free.
Logos of NVIDIA G-SYNC, VESA AdaptiveSync, and AMD FreeSync Premium Pro.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*The performance of the feature is compared to the models not applying the sync technology.
*Errors or delays may occur depending on the network connection.
VESA certified by ClearMR 21000, this monitor finally captures even the subtle blurring that occurs around the edges of moving objects, displaying fast-moving action with sharpness and detail. Also, it allows you to take a step closer to victory.
ClearMR 21000 for sharper, cleaner motion
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
Reducing input lag with Dynamic Action Sync, gamers can catch critical moments in real-time and respond quickly.
Black Stabilizer enhances visibility in dark scenes, revealing hidden details and improving clarity for smoother navigation through shadowy environments or sudden light changes.
The target point is fixed in the center to enhance shooting accuracy.
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
With the LG Switch app, it's easy to optimize your monitor for both gaming and everyday use. Effortlessly manage your monitor settings—adjust image quality and brightness to your preference, then apply your settings instantly using a hotkey. The app also lets you split the screen into 11 layouts and launch your video call platform in a click—bringing even more convenience to your setup.
*This video is for illustrative purposes only and may not reflect the actual 27GX790B product specifications.
*LG Switch requires software and manual download from LG.com for proper use.
*Headsets sold separately.
Experience our virtually borderless design featuring a fully adjustable base with swivel, tilt, and height. A clutter-free slim stand and wide-range swivel adjustment are designed to minimize desk space usage and eliminate dead space efficiently, while adding a sleeker, more refined look to your setup.
-30° ~ 30°
-5° ~ 21°
110mm
Clockwise
LG UltraGear 27GX790B gaming monitor displayed on a desk, showing a space battle scene with a spacecraft firing thrusters. To the right, two close-up shots highlight the slim stand design and base details of the monitor, emphasizing its minimal footprint and sleek profile
with DSC
*Images have been simulated to enhance feature understanding, and may differ from actual use experience.
*Limited warranty. Terms and conditions may vary by country.
Product name
UltraGear
Year
Y26
Aspect Ratio
16:9
Brightness (Min.) [cd/m²]
300cd/m²
Brightness (Typ.) [cd/m²]
335cd/m²
Color Depth (Number of Colors)
1.07B
Color Gamut (Min.)
DCI-P3 94.0% (CIE1976)
Color Gamut (Typ.)
DCI-P3 99.5% (CIE1976)
Contrast Ratio (Min.)
1200000:1
Contrast Ratio (Typ.)
1500000:1
Panel Type
OLED
Pixel Pitch [mm]
0.2292 x 0.2292 mm
Refresh Rate (Max.) [Hz]
540
Resolution
2560 x 1440
Response Time
0.02ms (GtG)
Size [cm]
67.3
Size [Inch]
26.5
Viewing Angle (CR≥10)
178º(R/L), 178º(U/D)
Reader Mode
Yes
AMD FreeSync™
FreeSync Premium Pro
Auto Input Switch
Yes
Black Stabilizer
Yes
Color Calibrated in Factory
Yes
Color Weakness
Yes
Crosshair
Yes
Dynamic Action Sync
Yes
FPS Counter
Yes
HDR 10
Yes
HDR Effect
Yes
HW Calibration
HW Calibration Ready
NVIDIA G-Sync™
G-SYNC Compatible
RGB LED Lighting
Unity Hexagon Lighting
Smart Energy Saving
Yes
User Defined Key
Yes
VESA DisplayHDR™
DisplayHDR™500 TRUE BLACK
VRR
Yes
Dual Controller
Yes
LG Calibration Studio (True Color Pro)
Yes
DisplayPort
Yes(1ea)
DP Version
2.1
HDMI
Yes(2ea)
Headphone out
4-pole (Sound+Mic)
USB-C
Yes
USB-C (Data Transsmission)
Yes
USB Downstream Port
Yes(2ea/ver3.0)
USB Upstream Port
Yes(via USB-C)
AC Input
100~240V (50/60Hz)
Power Consumption (DC Off)
Less than 0.3W
Power Consumption (Sleep Mode)
Less than 0.5W
Type
External Power(Adapter)
Display Position Adjustments
Tilt/Height/Swivel/Pivot
Wall Mountable [mm]
100 x 100
Dimension in Shiping (W x H x D) [mm]
790x182x496
Dimension without Stand (W x H x D) [mm]
605.2x351.0x51.2
Dimension with Stand (W x H x D) [mm]
605.2x527.6x220(Up)/605.2x397.6x220(Down)
Weight in Shipping [kg]
9.8
Weight without Stand [kg]
4.3
Weight with Stand [kg]
6.8
HDMI
Yes (ver 2.1)
Display Port
Yes (ver 2.1)
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