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LG UltraGear OLED GX7 (27GX790B) · Photo source

LG UltraGear OLED GX7 (27GX790B)
Photo 1 of 13

LG UltraGear OLED GX7 (27GX790B) · Photo source

LG · UltraGear

UltraGear OLED GX7 (27GX790B)

Released March 2026

LG's 2026 27-inch-class (26.5-inch) 1440p OLED gaming monitor that runs at 540Hz, or 720Hz at 720p in Dual Mode, suited to competitive PC gamers who put motion clarity first.

Size
26.5″
Resolution
2560 × 1440
PPI
111
Panel
OLED
Refresh
540 Hz
Brightness
335 nits
HDR
True Black 500
USB-C power
5 W

What reviewers say

Reviewers agree it is one of the fastest gaming monitors available, praising its very sharp motion, low input lag, bright, vibrant OLED picture and clean design. RTINGS found distracting VRR flicker and inaccurate HDR brightness; Tom's Guide and T3 noted the resolution stops at 1440p, and T3 found it pricey at full price.

From rtings.com, tomsguide.com and t3.com

Specifications

Report a wrong or missing spec

Display

Screen size
26.5″
Resolution
2560 × 1440 (QHD)
Sharpness
111 pixels per inch
Panel
OLED (4th Gen Primary RGB Tandem OLED; Dual mode: 720p at 720 Hz)
Refresh rate
540 Hz
Response time (grey to grey)
0.02 ms
Brightness (typical)
335 nits
HDR peak brightness
1,500 nits
HDR certification
DisplayHDR True Black 500
Colour range
99.5% DCI-P3
DCI-P3 coverage
99.5%
Screen finish
Matte
Shape
Flat
Colour depth
1.07B colours
Viewing angles
178° horizontal, 178° vertical (CR ≥ 10)
Pixel pitch
0.2292 × 0.2292 mm
Eye care
Reader Mode, Color Weakness mode
Calibration
Factory calibrated; hardware calibration ready (LG Calibration Studio)

Connections

Video inputs
2 × HDMI 2.1, DisplayPort 2.1, USB-C
USB-C charging
Up to 5 W
USB ports
2 × USB-A
Ethernet
No
USB hub detail
2 × USB 3.0 downstream, upstream via USB-C
Audio out
4-pole headphone out (sound + mic)

Design

Stand adjusts
Height, tilt, swivel, pivot
VESA mount
Yes
Weight with stand
6.8 kg
VESA pattern
100 × 100 mm
Size with stand
605.2 × 527.6 × 220 mm (raised), 605.2 × 397.6 × 220 mm (lowered)
Size without stand
605.2 × 351.0 × 51.2 mm
Weight without stand
4.3 kg

Power and support

Power use
Less than 0.5 W (sleep), less than 0.3 W (DC off)
Power supply
External adapter, 100–240 V AC, 50/60 Hz
Software
LG Calibration Studio (True Color Pro), Dual Controller
In the box
HDMI 2.1 and DisplayPort 2.1 cables

Pros and cons

Pros

  • 540Hz at 2560 x 1440, or 720Hz at 1280 x 720 in Dual Mode, with 0.02ms GtG response
  • DisplayPort 2.1 input plus two HDMI 2.1 inputs and a USB-C (DisplayPort Alt Mode) input
  • VESA DisplayHDR True Black 500, and LG quotes up to 1,500 nits peak

Cons

  • 1440p on 26.5 inches is about 110 ppi, compared with 163 ppi for a 27-inch 4K monitor
  • 335-nit typical brightness; the 1,500-nit peak is specified at 1.5% APL
  • USB-C supplies only 5W, which is not enough to charge a laptop

Closest rivals

Model
SizeResolutionPPIPanelRefreshBrightnessHDRUSB-C powerReleased
AcerPredator X27U F5
26.5″2560 × 1440111QD-OLED500 Hz300 nitsTrue Black 50065 WAug 2025
HPHyperX OMEN OLED 27qs
26.5″2560 × 1440111QD-OLED500 Hz300 nitsTrue Black 500100 WJan 2026
MSIMAG 272QP QD-OLED X50
26.5″2560 × 1440111QD-OLED500 Hz300 nitsTrue Black 50015 WAug 2025

Sources

  1. lg.com/uk/monitors/gaming/27gx790b-b
  2. lg.com/us/monitors/lg-27gx790b-b-gaming-monitor
  3. lg.com/global/newsroom/news/media-entertainment-solution/lg-unveils-ultragear-e…
  4. trustedreviews.com/news/lg-announces-ultragear-pricing-and-availability-for-202…
  5. rtings.com/monitor/reviews/lg/27gx790b-b
  6. tftcentral.co.uk/news/lg-27gx790b-is-unleashed-with-27-540hz-4th-gen-woled-pane…

Photo: lg.com

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