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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

  • Screen size27 in (26.5 in Viewable)
  • Display resolution2560 × 1440 (2K)
  • Refresh frequencyDual Mode QHD 540 Hz or HD 720 Hz
  • Panel typeOLED
  • Pixel response time0.02 ms (GtG)
  • HDR formatHDR10

Refresh rate 540Hz

  • 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.

How it compares

Measured against everything we stock in Monitors for Gamers, at today’s prices. Recalculated every night.

Price $741.99
Pricier than about 91% of the 839 comparable items (median $189.99).
Screen size 27 in (26.5 in Viewable)
Typical for this category: the median of 814 items is 27 in.
Refresh frequency Dual Mode QHD 540 Hz or HD 720 Hz
Higher than about 93% of the 735 comparable items (median 180 Hz).

Specifications

Product
Brand nameLG
Product lineUltraGear
Model name27GX790B-B
Case colorBlack
Display
Screen size27 in (26.5 in Viewable)
Display resolution2560 × 1440 (2K)
Refresh frequencyDual Mode QHD 540 Hz or HD 720 Hz
Panel typeOLED
Pixel response time0.02 ms (GtG)
HDR formatHDR10
Image brightness335 cd/m2
Screen curvatureFlat Panel
Widescreen formatYes
Display formatQHD
Variable refresh rateFreeSync Premium Pro & G-Sync Compatible
Viewing angles178° (H) / 178° (V)
Screen ratio16:9
Contrast1,500,000:1
Color gamut coverageDCI-P3 99.5%
Colors displayed1.07 Billion
Pixel pitch0.2292 mm
DisplayHDR certificationDisplayHDR True Black 500
Audio & video
Integrated speakersNo
Integrated webcamNo
Ports & slots
Video connectors1 x DisplayPort 2.1 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.1
USB connections2 x USB 3.0 Type-A Downstream
Headphone jack4-Pole(Sound+Mic)
Power
Power drawPower Save/Sleep Mode (Max): Less than 0.5 W
DC Off (Max): Less than 0.5 W
Power supply100–240 VAC, 50/60 Hz
Size & build
Stand adjustabilityHeight, Pivot, Swivel, Tilt
VESA mounting pattern100 × 100 mm
Product dimensions15.7 in-20.8 in × 23.8 in × 8.7 in with Stand
13.8 in × 23.8 in × 2.0 in without Stand
Product weight15.0 lb with stand
9.5 lb without stand
Shipping weight10.34 kg
Package size787 × 489 × 178 mm

Other versions of this model

3 more in the same range

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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