The LG UltraGear 27GX790B-B is a 27-inch QHD OLED gaming monitor built on a 4th Gen Primary RGB Tandem WOLED panel, delivering 540Hz at QHD or 720Hz in HD Dual Mode with a 0.02ms (GtG) response time.
Key Features
27" (26.5" viewable) QHD 2560 x 1440 4th Gen Primary RGB Tandem WOLED panel
Dual Mode: 540Hz at QHD or 720Hz at HD, 0.02ms (GtG) response time
VESA DisplayHDR True Black 500, HDR10, DCI-P3 99.5% (typical)
NVIDIA G-SYNC Compatible, AMD FreeSync Premium Pro and VESA Adaptive Sync
DisplayPort 2.1 (DSC), 2 x HDMI 2.1, USB-C (DP Alt Mode) and 2 x USB 3.0
Height, tilt, swivel and pivot adjustable stand, VESA 100 x 100 mm
Full Specifications
General
Brand
LG
Series
UltraGear
Model
27GX790B
Part Number
27GX790B-B
Colour
Black
Display
Size
27" class (26.5" viewable)
Panel
OLED (4th Gen Primary RGB Tandem WOLED)
Resolution
2560 x 1440 (QHD)
Aspect Ratio
16:9
Refresh Rate
540Hz (QHD) / 720Hz (HD, Dual Mode)
Response Time
0.02ms (GtG)
Brightness
335 cd/m² (typical)
Contrast Ratio
1,500,000:1
Colour Gamut
DCI-P3 99.5% (typical), 1.07 billion colours
HDR
VESA DisplayHDR True Black 500, HDR10
Gaming
Adaptive Sync
NVIDIA G-SYNC Compatible, AMD FreeSync Premium Pro, VESA Adaptive Sync
Features
Black Stabilizer, Crosshair, Dynamic Action Sync, DTS Headphone:X
Connectivity
Video Inputs
1 x DisplayPort 2.1 (DSC), 2 x HDMI 2.1, 1 x USB-C (DP Alt Mode)
USB
2 x USB 3.0 downstream
Audio
4-pole headphone out
Mechanical
Stand
Tilt -5° to 21°, swivel ±30°, height 130 mm, pivot
Wall Mount
VESA 100 x 100 mm
Who Is It For
Built for competitive and esports gamers who want the fastest OLED motion clarity, plus enthusiasts who want deep blacks and vivid HDR in a 27-inch QHD monitor.
Frequently Asked Questions
What is Dual Mode? It lets you switch between QHD at 540Hz and HD at 720Hz for maximum motion speed.
Does it support G-SYNC? Yes, it is NVIDIA G-SYNC Compatible and also supports AMD FreeSync Premium Pro.
Order the LG UltraGear 27GX790B-B from PC PARK with warranty and fast delivery across Saudi Arabia.
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Our Milestones
2023
Expanded our product catalog with the latest gaming and professional hardware, serving thousands of satisfied customers
2024
Launched our online store and delivery service, making tech accessible to customers across Saudi Arabia
2025
Reached a major milestone in customer satisfaction with enhanced after-sales support and warranty services
2026
Continuing to grow as Saudi Arabia's trusted destination for technology, gaming, and custom PC solutions
