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27 inch black OLED gaming monitor on height adjustable stand

LG Electronics

LG Electronics 27GX790B-B 27" OLED Gaming Monitor Dual Mode QHD 540Hz HD 720Hz

SKU CH-HCW3-2Q3CC MPN 27GX790B-B

27-inch OLED gaming monitor with Dual Mode QHD 540Hz or HD 720Hz, 0.02ms response, 335 nits brightness, 1500000:1 contrast, 99.5% DCI-P3, FreeSync Premium Pro and G-Sync Compatible

  • Cabinet ColorBlack
  • Screen Size27" (26.5" Viewable)
  • WidescreenYes
  • PanelOLED
  • Display TypeQHD
  • Adaptive Sync TechnologyFreeSync Premium Pro & G-Sync Compatible

Option 540Hz

Struck-through versions exist but are not stocked here.

  • 02ms response time keeps motion razor-sharp
  • Dual-mode switching between QHD 540Hz and HD 720Hz
  • 335 cd/m² brightness with 1,500,000:1 contrast for deep blacks
  • 5% DCI-P3 colour volume on 1.07 billion colours
  • FreeSync Premium Pro and G-Sync Compatible adaptive sync

27-inch OLED dual-mode monitor

The LG UltraGear 27GX790B-B is a 27-inch OLED gaming monitor that switches between a 2560 x 1440 panel at 540 Hz and a 720p panel at 720 Hz. It covers 99.5% of DCI-P3 with 1.07 billion colours and a 1,500,000:1 contrast ratio. A 0.02 ms GtG response time keeps motion sharp.

Competitive players who need both resolution

This display suits esports competitors who want QHD detail for immersive titles and a 720 Hz mode for pure reaction speed. Creative work benefits from the wide gamut and true blacks. Buyers who only need a fixed 144 Hz panel or who lack a GPU able to drive 540 Hz should consider simpler alternatives.

DisplayPort 2.1 enables the 720 Hz mode

DisplayPort 2.1 provides the bandwidth required for the 720 Hz HD mode and the 540 Hz QHD mode. The monitor also includes two HDMI 2.1 ports and a USB-C connection. Without a DP 2.1 source the highest refresh rates cannot be reached.

Highlights

  • 02ms response time keeps motion razor-sharp
  • Dual-mode switching between QHD 540Hz and HD 720Hz
  • 335 cd/m² brightness with 1,500,000:1 contrast for deep blacks
  • 5% DCI-P3 colour volume on 1.07 billion colours
  • FreeSync Premium Pro and G-Sync Compatible adaptive sync

Specifications

BrandLG
SeriesUltraGear
Model27GX790B-B
Cabinet ColorBlack
Screen Size27" (26.5" Viewable)
WidescreenYes
PanelOLED
Display TypeQHD
Adaptive Sync TechnologyFreeSync Premium Pro & G-Sync Compatible
Resolution2560 x 1440 (2K)
Viewing Angle178° (H) / 178° (V)
Aspect Ratio16:9
Brightness335 cd/m2
Contrast Ratio1,500,000:1
Response Time0.02ms (GtG)
Color GamutDCI-P3 99.5%
Display Colors1.07 Billion
Monitor Pixel Density0.2292mm
Refresh RateDual Mode QHD 540Hz or HD 720Hz
HDR StandardHDR10
VESA Certified DisplayHDRDisplayHDR True Black 500
Curved Surface ScreenFlat Panel
Video Ports1 x DisplayPort 2.1 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.1
USB Ports2 x USB 3.0 Type-A Downstream
Headphone4-Pole(Sound+Mic)
Power Supply100 - 240 VAC, 50/60Hz
Power ConsumptionPower Save/Sleep Mode (Max): Less than 0.5W
DC Off (Max): Less than 0.5W
Stand AdjustmentsHeight, Pivot, Swivel, Tilt
Built-in SpeakersNo
Built-in WebcamNo
VESA Compatibility - Mountable100 x 100mm
FeaturesHDR Effect
Factory Calibrated
H/W Calibration: Ready
VRR
VESA Adaptive Sync
VESA Dual-Mode: QHD 540Hz / HD 720Hz
VESA ClearMR: 21000
Reader Mode
Color Weakness Mode
Black Stabilizer
Dynamic Action Sync
Crosshair
FPS Counter
User Define Key
Auto Input Switch
Live Color Low Blue Light
Smart Energy Saving
RGB LED Lighting: Hexagon Lighting
LG Calibration Studio (True Color Pro)
Dual controller
LG Switch
DTS Headphone:X
Dimensions15.7''-20.8'' x 23.8'' x 8.7'' with Stand
13.8'' x 23.8'' x 2.0'' without Stand
Weight15.0 lbs. with stand
9.5 lbs. without stand
Shipping weight10.34 kg
Package size787 × 489 × 178 mm

Other versions of this model

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Questions about this item

Does the monitor support both G-Sync and FreeSync at the same time?

The display is certified G-Sync Compatible and FreeSync Premium Pro, so either adaptive-sync implementation will work with a matching graphics card.

What cable do I need to reach the highest refresh rate?

Use the included DisplayPort 2.1 cable; it provides the bandwidth required for 540 Hz at QHD or 720 Hz at HD resolution.

How much desk depth does the stand require?

The height-adjustable, swivel and pivot stand has a compact footprint that fits typical gaming desks without overhang.

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