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LG

LG 27GX790B-B 27” Ultragear QHD (3440 x 1440) OLED Gaming Monitor, Dual Mode (QHD 540Hz/ HD 720Hz), 0.02ms, TrueBlack 500, NVIDIA G-Sync Compatible, AMD FreeSync Premium Pro, DP 2.1, USB-C, Black | NVIDIA G-Sync Compatible, USB-C, AMD FreeSync Premium Pro, 27' (3440 x 1440), Dual Mode (/HD), 0.02ms, TrueBlack 500

  • Based on 43 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Aug 18
Order within 6 hours and 31 minutes
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Features

  • Outrageous Speed with LG's Brightest OLED Gaming Monitor - Experience the brightness and speed of 4th Gen OLED on a vivid 27" QHD displayengineered for ultra-smooth, tear-free gameplay. With a refresh rate up to 720Hz and lightning-fast 0.02ms response time, youll react faster, track every movement with precision, and outpace your opponents frame by frame with astounding brightness, clarity and speed.
  • Our Brightest, Boldest OLED Gaming Monitor - Powered by UltraGears latest OLED with Primary RGB Tandem tech, this is LGs brightest OLED gaming monitor yetreaching 335 nits typical brightness for clear visibility in bright scenes. Enhanced APL and reduced ABL keep critical visuals sharp during intense action, while UL Verified Perfect Black and DisplayHDR True Black 500 deliver deep contrast and pinpoint detail.
  • Next-Gen OLED Brilliance - 4th Gen Primary RGB Tandem OLED reaches 335 nits typical brightness while using less power than previous UltraGear OLED generations. The display's advanced 4-stack RGB structure delivers enhanced contrast, sharper detail, and color precision that stays consistent across every frame.
  • Dual Mode: QHD 540Hz for Detail or HD 720Hz for Speed - Dual Mode pushes gaming speed to the edge, letting you toggle between QHD resolution at 540Hz or HD at 720Hz from a hotkey. Gain outrageous speed and responsiveness for split-second decisions and competitive domination.
  • DisplayPort 2.1 Delivers Next-Gen Gaming Speed - DisplayPort 2.1 unlocks ultra-fast data speeds for stable, high-refresh gaming up to 720Hz. USB-C keeps your setup clean with single-cable output, and dual HDMI 2.1 ports connect seamlessly to todays top consoles. More bandwidth. More clarity. More ways to win.
  • A Virtually Instantaneous 0.02 Response Time (GtG) - 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.
  • NVIDIA G-SYNC Compatible & AMD FreeSync Premium Pro - NVIDIA G-SYNC Compatible and AMD FreeSync Premium Pro deliver smooth, tear-free, low-latency gaming with high refresh ratesso every frame stays fluid and sharp.
  • UL-Verified for a "Perfect" Visual Experience - UL-verified Perfect Reproduction delivers that actual game content is faithfully rendered on screen, maintaining intended color and detail in both dark and bright environments. Unlike static image-based metrics, this certification reflects real-world content reproduction accuracy.
  • Deeper Detail with VESA DisplayHDR True Black 500 - Experience breathtaking realism with VESA DisplayHDR True Black 500, delivering nuanced shadow detail and rich black expressioneven in the darkest game scenes. A 1.5 million:1 contrast ratio pairs with up to 99.5% (typical), DCI-P3 color gamut and Delta E2 color accuracy, to ensure colors are vivid, precise, and true to the creators intentgiving gamers and creators alike the confidence to see every frame as it was meant to be seen.

Description

The LG UltraGear OLED 27GX790B is built for gamers who want every visual and competitive advantage. UltraGear's 27-inch 4th Generation OLED QHD resolution display delivers pinpoint clarity with UL Verified Perfect Black and Perfect Color¹, exposing incredible detail and nuanced highlights. VESA DisplayHDR True Black 500 adds deeper contrast and controlled brightness, giving gamers a sharper read on enemies, environments, and effects in every gaming scenario.Speed is where this UltraGear OLED separates itself from others. Dual Mode² gives gamers two elite paths to victory: a 540Hz refresh rate at QHD resolution for high-resolution precision or 720Hz at HD for pure, unleashed speed. Paired with a near-instantaneous 0.02ms response time, motion stays clean and fast—ideal for tracking targets, reacting faster, and winning close engagements.Your frames stay stable under pressure with NVIDIA G-SYNC compatibility and AMD FreeSync Premium Pro³, delivering tear-free, low-latency performance. VESA Certified ClearMR backs it up with verified motion-blur clarity, keeping visual noise out of the fight.For next-gen setups, DisplayPort 2.1 ensures maximum bandwidth for high refresh rates and smooth data flow. A 4-pole headphone jack supports game audio and comms through one connection. And with full ergonomic control—height, tilt, swivel, and pivot—you can dial in your perfect competitive setup.The 27GX790B delivers elite OLED performance, breakthrough speed, and incredible performance built for players who refuse to settle.Source: Circana, LLC, Retail Tracking, Monitors, Gaming Designed, Display Type: OLED, Dollars, Jan - Dec 2025¹This LG OLED panel has been certified with “Perfect Black”, “Perfect Color with 100% Color Fidelity” and “Perfect Reproduction”. Certificate Number: Perfect Black (OLED)- V183632, Perfect Color V569367 – “Perfect Reproduction” V756760 by UL.²Requires graphics card that support up to 720Hz refresh rate (Full HD). Actual refresh rates may vary depending on computer graphics specifications and configurations. Graphics card available separately.³NVIDIA 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 2.1.⁴Requires graphics card that supports 720Hz refresh rate support (HD). Actual refresh rates may vary depending on computer graphics specifications and configurations.⁵LG OLED panels have been certified as Flicker-Free, Discomfort Glare Free, Low Blue Light, Verified Reduced Blue Light and Verified Reduced Circadian Stimulating 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. Verified for reduced circadian stimulating blue light (V745354). Verified for reduced blue light (V275741).⁶Headphones sold separately. For DTS patents, see Manufactured under license from DTS, Inc. or its affiliates. DTS trademarks and logos are registered trademarks or trademarks of DTS, Inc. in the United States and other countries. ALL RIGHTS RESERVED.⁷To download the latest version of the LG Switch app, visit LG.com.

Brand: LG


Screen Size: 27 inches


Resolution: QHD Wide 1440p


Aspect Ratio: 169


Screen Surface Description: Matte


Aspect Ratio: 169


Screen Finish: Matte


Contrast Ratio: 15000001


Refresh Rate: 720 hertz


Display Type: OLED


Display Technology: OLED


Brightness: 335 candela_per_square_meter


Pixel Pitch: 0.23


Color Gamut: 99.5


Picture Quality Enhancement Technology: DisplayHDR TRUE BLACK 500, HDR 10


Screen Size: 27 inches


Item Dimensions D x W x H: 8.7"D x 23.8"W x 20.8"H


Item Weight: 15 pounds


Resolution: QHD Wide 1440p


Display Resolution Maximum: 3440 x 1440 pixels


Native Resolution: 3440x1440


Connectivity Technology: DisplayPort, HDMI, USB Type A, USB Type C


Hardware Connectivity: DisplayPort, HDMI, USB 3.0 Type A, USB Type C


Adaptive Sync: FreeSync Premium Pro, G-Sync Compatible


Additional Features: Dynamic Action Sync, Height Adjustment, High Dynamic Range, Pivot Adjustment, Swivel Adjustment


Specific Uses For Product: Desktop, Entertainment, Gaming


Color: Black


Compatible Devices: Desktop, Laptop


Shape: Flat


Brand: LG


Model Number: 27GX790B-B.AUS


Model Name: 27GX790B-B.AUS


Warranty Description: 2 Year Parts and Labor


UPC: 195174137055


Manufacturer: LG Electronics Inc.


Included Components: Display Port 2.1 Cable, HDMI 2.1 Cable, Monitor, Power Cable


Response Time: 0.02 milliseconds


Total Number of HDMI Ports: 2


Total Usb Ports: 3


Number of Component Outputs: 3


Total USB 3.0 Ports: 2


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Aug 18

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Good Option
Its perfect gaming monitor only problem is I think dual mode 720hz option I mean 720hz work just fine but its really buggy like screen and system go crazy you can’t click anything sometimes and game too and ofc 720p I mean if you play csgo or other fps games its important but if you want 720hz I think other companies will be more better but 540hz with 2k is just fine and perfect and I buy with prime discount it came 499$ for this value quality best option ... show more
Reviewed in the United States on August 2, 2026 by Yusuf Baran Kucuk
    • Loving it, didn’t get my plastic on the screen to tear off.
I got it, visually it’s fine, there is vertical banding but in practical use you won’t see it. It glitches out and flickers really bad when I have two discord tabs open e.g. settings for discord in a small tab while full screen behind a discord chat. (idk if the grey colour messes with it). Besides that its perfect. I do get the high frames etc. its good there. My unit came without any plastic on the screen on the front so i assume its a returned product or something but the packaging was flawless i guess but i think all new screens should have a plastic to tear off the screen. The stand for the monitor came with a lots of minor scratches on the silver part (Vesa mount) that mounts to the monitor. Makes me think this stand was used a lot previously or something because why is a new stand having so many scratches in the area used to hook to the monitor? In practice. I don’t see those because its mounted to the monitor and the monitor mount works just fine. Would have been nice to get my plastic on my screen and a scratch-less vesa mount but those weren’t dealbreakers. The banding isn’t as bad as reddit makes it seem. Its there if you go looking for it but in games like apex overwatch and CS2, its absolutely perfect. Text is also good on it. You dont really see any issues. The monitor gets very bright and maintains the image quality in any environment. I have a 100W white bulb blasting on the screen and a window next to it and the visual quality remains as if the light didn’t exist. The matte coating is better for practical use. Sure reddit likes glossy and im sure glossy shows better if not hampered by external light sources but im a human in a house not a bat in a cave. So matte is practical. ... show more
Reviewed in the United States on July 18, 2026 by Dimitri Doodal
    • Perfect monitor for BattleRoyal Games
I would buy another one is a perfect monitor, my last monitor was a zowie 600hz and that change with an oled is a super big difference
Reviewed in the United States on July 28, 2026 by strebestsk
    • Almost perfect, but probably needs 10 years for the other Hardware to catch up - bad quality
Loved it while it worked, it developed a thin red vertical line on the left side of the screen in just a couple of months. The 540hz worked out of the box, but the 720hz made me go through a couple of different cables before it worked, I think an IVANKY brand worked. Was trying to use it with AI to generate extra frames for anime/movies to get it to 720fps, but even with a 5090 it failed to do that, you would have to do the interpolation beforehand and it's still limited to 540fps, you would have to do a second pass if you want full 720fps - which is definitely not worth it. The frames also lack the correctness of movement even with NVOF, so it's not worth it for that. Cyberpunk 2077 looked amazing and I was hitting high 500 fps on it with fake frames, it looked pretty realistic and beautiful, even with path tracing on - I would have kept it forever if it didn't break, seems like quality control is a bit lacking. The matte screen was bright enough and even in a very bright room it dissipated all the light from a VERY VERY VERY bright lightbulb - would get matte again for sure. The price is probably not that great though, you can get 300+ hz monitors with similar specs for a lot less and it will save you some connectivity issues. The g-sync stabilizer did make some games/browser windows blink weirdly so I had to turn it off/on - which is annoying. ... show more
Reviewed in the United States on August 3, 2026 by shupito
    • No esperes más, no esperes menos
Review Image by Jalruto
Es un tándem oled, no esperes más, no esperes menos, su típico problema con el gris que honestamente ni se nota realmente, es mínimo tienes que ponerte a buscarlo y lo vez únicamente en pestañas totalmente grises, cumple todo 540hz-720hz, tiempos de respuesta,1440p, full negros, mejores colores, pero no es Dp2.1 completo Es difícil encontrarle un contra real que te diga lo no lo compro o lo devuelvo Lo uso en una habitación totalmente clara de día y ningún problema al 40% de brillo Texto totalmente legible Flicker perceptible con VRR (como TODOS los oled) El acabado matte no es realmente un problema Pd: tener cuidado al transportarlo o colocarlo sobre superficies sólidas boca abajo, el acabado se puede rayar con más facilidad que otros monitores, pero es cuestión de cuidado y no se ve al tener la pantalla encendida ... show more
Reviewed in the United States on July 14, 2026 by Jalruto
    • No es lo que esperaba
No es lo que esoersba
Reviewed in the United States on July 8, 2026 by Federico borello
    • Grainy matte finish
I was looking to get away from all the curved 4K screens and get a 1440p flat display that would play nicer with my video card. The main issue I had was the grainy matte finish. It accentuates the lower resolution, making everything look bad. It also makes the picture seem dull despite that this tandem OLED is supposed to be super bright. HDR looked especially bad. Returned it. ... show more
Reviewed in the United States on February 28, 2026 by Josh
    • Beautiful color, crisp and clear movement in game
Absolutely stunning monitor. The dual mode is about useless for most games, you likely won't be hitting the fps to utilize the hz anyway. The default refresh at 1440 is amazing. I could not believe how clear movement looked in cs2. However I prefer ultrawides and will be looking for a 360hz ultrawide for my OLED ... show more
Reviewed in the United States on June 30, 2026 by Cookie

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