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LG UltraGear OLED 27" Dual Mode QHD 1440p 540 Hz / FHD 720 Hz Gaming Monitor

BH #LG27GX790BBA • MFR #27GX790B-B.AUS
12 reviews
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LG UltraGear OLED 27" Dual Mode QHD 1440p 540 Hz / FHD 720 Hz Gaming Monitor
Key Features
  • 26.5" 16:9 OLED Panel
  • HDMI 2.1 | DisplayPort 2.1 | USB-C
  • QHD 2560 x 1440 at 540 Hz
  • FHD 1920 x 1080 at 720 Hz
Catch every detail while competing in fast-paced games and exploring fantastic worlds with the LG UltraGear OLED 27" Dual Mode QHD 1440p 540 Hz / FHD 720 Hz Gaming Monitor. Designed primarily for gaming enthusiasts, this QHD 2560 x 1440 OLED display delivers ultra-smooth visuals with a 540 Hz refresh rate and 0.02 ms response time. Setting a Full HD resolution enables a whopping 720 Hz refresh rate. AMD FreeSync Premium Pro and NVIDIA G-Sync compatibility eliminate screen tearing and stuttering with compatible graphics cards.
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$699.99
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LG 27GX790B-B Overview

Catch every detail while competing in fast-paced games and exploring fantastic worlds with the LG UltraGear OLED 27" Dual Mode QHD 1440p 540 Hz / FHD 720 Hz Gaming Monitor. Designed primarily for gaming enthusiasts, this QHD 2560 x 1440 OLED display delivers ultra-smooth visuals with a 540 Hz refresh rate and 0.02 ms response time. Setting a Full HD resolution enables a whopping 720 Hz refresh rate. AMD FreeSync Premium Pro and NVIDIA G-Sync compatibility eliminate screen tearing and stuttering with compatible graphics cards.

With HDR10 support and rich contrast, the UltraGear delivers stunning visuals featuring realistically bright highlights and deep shadows. Connecting your compatible laptop to the USB-C port allows you to transfer video, data, and power over a single cable. It also provides you with access to the integrated USB 3.2 Gen 1 hub, which allows you to connect up to 5 Gb/s compatible devices. There are also two HDMI 2.1 ports and one DisplayPort 2.1 input. Plugging a headset into the 3.5mm audio jack can immerse you in DTS virtual surround sound. Ambient RGB backlighting helps to enhance the mood while you play.

Dual Mode
You can switch from exploring vast open worlds at QHD 540 Hz resolution to competing in high-speed matches with Full HD 720 Hz performance.
Vivid Color
Framed inside thin bezels, the 26.5" OLED panel is factory-calibrated to deliver cinematic experiences with support for 1.07 billion colors, covering 99.5% of the DCI-P3 gamut. Visuals are enhanced with VESA DisplayHDR True Black 500 certified high-dynamic range, supporting a 1.5 million:1 static contrast ratio.
VESA ClearMR21000
This VESA ClearMR 21000-certified monitor significantly reduces motion blur to deliver liquid-smooth visuals, making fast-moving targets while gaming sharp, clear, and easy to track.
Bright OLED
Powered with Primary RGB Tandem technology, this monitor provides up to 335 nits of brightness for clear visibility.
Adaptive Sync Technologies
AMD FreeSync and NVIDIA G-SYNC compatibility ensures tear-free, stutter-free gaming with variable refresh rate (VRR) technology. A compatible graphics card is required.
Amped Up Gaming Audio
The built-in speaker system is designed to deliver deep bass for rich audio. Experience 3D audio with DTS Headphone, which immerses you in spatial sound. The four-pole headphone jack combines stereo audio and mic input, delivering crisp sound and clear gameplay comms through a single connection.
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.
Ergonomics
Optimize your view by adjusting the height, tilt, swivel, and screen rotation. You can also use the 100 x 100mm VESA mounting pattern to attach the screen to a swivel arm or multi-monitor stand.
UPC: 195174137055

LG 27GX790B-B Specs

Key Specs
Display Size
27"
Panel Type
OLED
Native Resolution
2560 x 1440
Maximum Brightness
335 nits / cd/m2 (Sustained)
300 nits / cd/m2 (Minimum)
HDR Support
Yes: HDR10
Color Support
1.07 Billion Colors
Color Gamut
99.5% DCI-P3
Touchscreen
No
A/V Inputs
3.5 mm / DisplayPort 2.1 / HDMI
USB I/O
USB-A 3.2 Gen 1 / USB-C 3.2 Gen 1
Built-In Speakers
No
Display
Size
27"
Panel Type
OLED
Aspect Ratio
16:9
Native Resolution
2560 x 1440
Maximum Brightness
335 nits / cd/m2 (Sustained)
300 nits / cd/m2 (Minimum)
HDR Support
Yes: HDR10
Contrast Ratio
Near Infinite (Black Pixels Emit No Light)
Response Time
0.02 ms (GtG)
Refresh Rate
540 Hz
Variable Refresh Technology
FreeSync Premium Pro, G-Sync
Color Support
1.07 Billion Colors
Color Gamut
99.5% DCI-P3
Viewing Angle (H x V)
178 x 178°
Curved Display
No
Surface
Touchscreen
No
Connectivity
A/V Inputs
2x HDMI 2.0
1x DisplayPort 2.1
1x 1/8" / 3.5 mm TRRS
HDCP Support
No
USB I/O
1x USB-C 3.0 / 3.1/3.2 Gen 1
2x USB-A 3.0 / 3.1/3.2 Gen 1
Multi-Input Support (PIP/PBP)
No
Speaker
Built-In Speakers
No
Electrical
Input Power
100 to 240 VAC, 50 / 60 Hz
Power Adapter Type
Internal
General
Adjustments
Adjustable
Screen Pivot (Arm)
Swivel
Tilt
Height
VESA Mounting-Hole Pattern
100 x 100 mm
Lock Slot
No
Dimensions
23.8 x 20.8 x 8.7" / 60.5 x 52.8 x 22.1 cm (with Stand)
23.8 x 13.8 x 2" / 60.5 x 35.1 x 5.1 cm (without Stand)
Weight
15 lb / 6.8 kg (with Stand)
9.5 lb / 4.3 kg (without Stand)
Packaging Info
Package Weight
22.5 lb
Box Dimensions (LxWxH)
35 x 19 x 7"

LG 27GX790B-B Reviews

We are satisfied with the quality of product

By Miranda C
Rated 5 out of 5
Date: 2026-05-26

[This review was collected as part of a promotion.] Very happy with this monitor. Noticeable depth of color and blacks. Frame rate is seamless. I can appreciate how heavy the base is, and feels like a solid monitor. All in all great picture, lovely gaming monitor, and happy with our purchase! Review submitted as part of a program that provides a purchase discount.

Clean, Fast, and Worth It

By Charles L
Rated 5 out of 5
Date: 2026-04-15

[This review was collected as part of a promotion.] I’ve been using this monitor for gaming and everyday use, and it’s honestly been a big upgrade. The OLED display looks super clean and sharp, especially in darker scenes where the contrast really stands out. Everything feels smooth too, especially in fast-paced games there’s basically no blur and the response time feels instant. Setup was easy, and the overall build quality feels premium. It just looks really good on my desk and performs even better. If you’re looking for a high-end gaming monitor with great visuals and smooth performance, this is definitely worth it. - Review submitted as part of a program that provides a purchase discount.

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