Skip to content
LG LG 27GX790B – Full Specifications Monitor
RATED
Excellent
9.8/10

26.5″ LG 27GX790B – Full Specifications

The LG 27GX790B is a 26.5-inch tandem OLED gaming monitor at 2560×1440 that pairs 48–540 Hz refresh with a 0.02 ms response time.

26.5″ · 16:9 · MODEL YEAR 2026
LG●Monitor
LG Monitor
Add as preferred source
Display
26.5 in, OLED, 2560 × 1440
26.5
Refresh Rate
48–540 Hz
48
Brightness
335 nits
Contrast Ratio
1500000:1
1500000

Pros & Cons

Pros
  • 540 Hz refresh ceiling gives esports-grade motion clarity at QHD
  • OLED pixels switch off individually, so black levels are effectively perfect (1,500,000:1 stated contrast)
  • 0.02 ms minimum response time keeps OLED motion crisp
  • 1500 nits peak brightness gives HDR highlights real punch
  • 99.5% DCI-P3 coverage delivers very rich, wide-gamut color
  • Fully adjustable stand covers height, tilt, swivel and portrait pivot
  • DisplayHDR 500 True Black certification gives a defined HDR performance floor
  • DisplayPort 2.1 gives plenty of bandwidth for high resolutions at high refresh
Cons
  • Burn-in remains a long-term risk with static desktop elements, even with OLED Care features
  • Reaching 540 Hz in practice needs a very powerful GPU and a competitive esports setup
  • 335 nits typical brightness trails LCD monitors in bright full-screen scenes
  • The 1500 nits peak is a short-duration figure, and sustained full-screen brightness is much lower
  • USB-C is listed without power delivery, so a laptop still needs its own charger
  • Static office layouts with taskbars and toolbars are the weak spot for an all-day work screen
  • No built-in speakers listed
  • No built-in webcam

Score & Ratings

9.8/10 Great
Design
10
Display
9
Color Performance
10
Performance
10
Connectivity
10
Model Information 8
Specification Value
Brand LG
Series UltraGear
Model 27GX790B
Model Alias UltraGear 27GX790B-B
Full Product Name LG UltraGear 27GX790B
Model Year 2026
Monitor Type Gaming Monitor
Available Colors Black
Display & Panel 12
Specification Value
Screen Size 26.5 in
Exact Diagonal 26.5 in
Screen Shape Flat
Aspect Ratio 16:9
Active Display Width 586.75 mm
Active Display Height 330.05 mm
Display Area 91.16%
Panel Type OLED
Panel Technology OLED
Panel Manufacturer LG Display
Self-Emissive Display Yes
3D Support No

26.5" Display Size (67.3 cm) 16:9

67.3cm 26.5" 58.7 cm / 23.1" 33 cm 13"
Resolution & Pixel Details 4
Specification Value
Native Resolution 2560 × 1440
Resolution Name Quad HD (QHD) / 1440p
Pixel Density 110 ppi
Pixel Pitch 0.229 mm
Picture Quality & Color 12
Specification Value
Panel Bit Depth 10-bit
FRC No
Display Colors 1.07 billion
Total Color Bits 30-bit
Typical Brightness 335 nits
Peak Brightness 1500 nits
HDR Support Yes
HDR Formats
HDR10
HDR Certification
DisplayHDR 500 True Black
DCI-P3 Coverage 99.5%
Factory Calibration Yes
Hardware Calibration Ready
DESK DISTANCE FIT 65cm
~65 cm desk distance
Ideal Fit
49°
CompactIdeal FitWideUltra-Wide

Fills central vision comfortably at a typical desk distance — no head movement needed.

Refresh Rate, Response & Gaming 13
Specification Value
Refresh Rate Range 48–540 Hz
Minimum Response Time 0.02 ms
Input Lag 1.7 ms
Variable Refresh Rate Yes
Adaptive-Sync VESA AdaptiveSync Display
AMD FreeSync Premium Pro
NVIDIA G-Sync Compatible
Black Stabilizer Yes
Crosshair Yes
FPS Counter Yes
Dynamic Action Sync Yes
Picture-by-Picture Yes
Picture-in-Picture Yes
Ports & Connectivity 12
Specification Value
HDMI Ports
2× HDMI 2.1
HDMI Version HDMI 2.1
DisplayPort Input 1× DisplayPort 2.1
DisplayPort Version DisplayPort 2.1
USB-C Video Input Yes
DisplayPort Alt Mode Yes
Display Stream Compression DSC
USB-C Input 1× USB-C 3.2
USB-A Ports
2× USB-A 3.0
Audio Output 3.5 mm (4-pole; sound+mic with DTS: X)
Headphone Output Yes
Microphone Input Yes (4-pole headset)

Ports & Connections

HDMI2USB-A2USB-CDisplayPortHeadphone
Audio, Camera, Network & Smart Features 3
Specification Value
Built-In Speakers No
Audio Technologies DTS Headphone:X
Built-In Camera No
Ergonomics & Stand 13
Specification Value
VESA Mount Yes
Removable Stand Yes
Height Adjustment Yes
Height Adjustment Range 110 mm
Tilt Adjustment Yes
Forward Tilt 5°
Backward Tilt 21°
Swivel Adjustment Yes
Left Swivel 30°
Right Swivel 30°
Pivot Adjustment Yes
Left Pivot 0°
Right Pivot 90°
Dimensions, Weight & Design 7
Specification Value
Dimensions With Stand 605.2 × 397.6 × 220 mm
Dimensions Without Stand 605.2 × 351 × 51.2 mm
Weight With Stand 6.8 kg
Stand Depth 220 mm
Bezel Design 3-side frameless design
RGB Lighting Yes
Lighting System Hexagon Lighting
Power & Operating Conditions 13
Specification Value
110V Input Range 100–120V
220V Input Range 220–240V
AC Frequency 50–60 Hz
Electric Current 5 A
Average Power Consumption 73 W
Maximum Power Consumption 100 W
Sleep Consumption 0.5 W
Off Consumption 0.3 W
Operating Temperature 0–40°C
Operating Humidity 20–90%
Operating Altitude 5000 m
Storage Temperature -20–60°C
Storage Humidity 10–90%
Eye Care, Protection & Additional Features 9
Specification Value
Flicker-Free UL-verified
Low Blue Light Eyesafe 3.0
Reader Mode Yes
OLED Protection OLED Care
OLED Care Yes
Desktop Control Software Dual Controller
Monitor Management Software LG Switch
Smart Energy Saving Yes
Additional Monitor Features Overscan
Certifications, Standards & Licenses 3
Specification Value
VESA DisplayHDR
DisplayHDR 500 True Black
VESA AdaptiveSync VESA AdaptiveSync Display
ClearMR ClearMR 21000
Included Accessories 2
Specification Value
HDMI Cable Included
DisplayPort Cable Included
Packaging Information 5
Specification Value
Package Dimensions 790 × 496 × 182 mm
Package Width 790 mm
Package Height 496 mm
Package Depth 182 mm
Package Weight 9.8 kg
⚡

Estimated Running Cost

Based on this product's rated power draw, not an independent lab measurement — actual usage varies with settings and content.

Daily—
Monthly—
Annually—

Uses about 62% less power than the average we track in this category.

Reviews

NO REVIEWS YET Own this display? Your rating helps calibrate the score for everyone.
DISPLAYINPUT · INDEPENDENT · SPEC-BASED · NO SPONSORED PLACEMENT SHEET № 27GX790B