LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD

27 inch · 2560 x 1440 · 540 Hz · WOLED

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Screen size 27 inch
Resolution 2560 x 1440
Refresh rate 540 Hz
Panel WOLED
Response time 0.02 ms

LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD is a 27-inch monitor with 2560 x 1440 resolution, a 540 Hz refresh rate and WOLED panel. The high refresh rate makes fast games look smoother. It came out in 2026.

Released: 2026-01-10

Specifications

Key specs

Screen size: 27 inch
Resolution: 2560 x 1440
Refresh rate: 540 Hz
Panel: WOLED
Response time: 0.02 ms
Released: 2026-01-10
Part number: 27GX790B-B.AEK
EAN / UPC: 8806096736500

Display

Display diagonal: 68.6 cm (27")
Display resolution: 2560 x 1440 pixels
HD type: Quad HD
Native aspect ratio: 16:9
Display technology: OLED
Panel type: WOLED
Display brightness (peak): 1500 cd/m²
Display brightness (typical): 335 cd/m²
Response time: 0.02 ms
Response time measurement type: GTG (Gray to Gray)
Display surface: Matt
Anti-glare screen: Yes
Screen shape: Flat
Supported graphics resolutions: 2560 x 1440, 1280 x 720 (HD 720)
Contrast ratio (typical): 1500000:1
Maximum refresh rate: 540 Hz
Refresh rate optimizor: Yes
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 1.07 billion colours
Pixel pitch: 0.2292 x 0.2292 mm
Pixel density: 111 ppi
Horizontal scan range: 31.5 - 957.8 kHz
Vertical scan range: 60 - 720.3 Hz
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: HDR True Black 500, HDR Effect, High Dynamic Range 10 (HDR10)
Colour gamut standard: DCI-P3
Colour gamut: 99.55%
DCI-P3 coverage: 99.5%

Performance

NVIDIA G-SYNC: Yes
NVIDIA G-SYNC type: G-SYNC Compatible
AMD FreeSync: Yes
AMD FreeSync type: FreeSync Premium Pro
VESA Adaptive Sync support: Yes
Flicker-free technology: Yes
Low Blue Light technology: Yes
Game mode: Yes

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Design

Market positioning: Gaming
Product colour: Black

Ports & interfaces

Built-in USB hub: Yes
Number of upstream ports: 1
Number of downstream ports: 2
Number of USB Type-C upstream ports quantity: 1
USB Type-A downstream ports quantity: 2
USB Type-C downstream ports quantity: 1
USB Type-C DisplayPort Alternate Mode: Yes
USB Power Delivery (USB PD): Yes
HDMI: Yes
HDMI ports quantity: 2
HDMI version: 2.1
DisplayPorts quantity: 1
DisplayPort out quantity: 1
DisplayPort version: 2.1
Audio output: Yes
Headphone out: Yes
Headphone outputs: 1
Headphone connectivity: 3.5 mm
Microphone in: Yes
HDCP: Yes
HDCP version: 2.3

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Height adjustment: Yes
Pivot: Yes
Swivelling: Yes
Tilt adjustment: Yes
On Screen Display (OSD): Yes

Power

Energy efficiency class (SDR): F
Energy efficiency class (HDR): G
Energy consumption (SDR) per 1000 hours: 25 kWh
Energy consumption (HDR) per 1000 hours: 29 kWh
Power consumption (typical): 25 W
Power consumption (standby): 0.5 W
Power consumption (max): 46.32 W
Power consumption (off): 0.3 W
AC input voltage: 100 - 240 V
AC input frequency: 50/60 Hz
Power supply type: External
Energy efficiency scale: A to G

Weight & dimensions

Width (with stand): 605.2 mm
Depth (with stand): 220 mm
Height (with stand): 257.6 mm
Weight (with stand): 6.8 kg
Width (without stand): 605.2 mm
Depth (without stand): 51.2 mm
Height (without stand): 351 mm
Weight (without stand): 4.3 kg

Other features

Brand specific technologies: Black Stabiliser, Crosshair, DAS Mode, Dual Mode
Low input lag: Yes
FPS counter: Yes
Hardware calibration: Yes
Warranty period: 2 year(s)
Compliance certificates: UL

Check the manufacturer's page before buying.

Ready to buy? Get the LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD at today's price.Buy now

About this product

Next-Level Visuals with 4th Gen WOLED Display – Dive into ultra-sharp detail on this 27" QHD (2560x1440) 4th Gen Tandem OLED gaming monitor. Expect deeper blacks, fast response, and jaw-dropping clarity that redefines your play. LG’s Brightest* Gaming Monitor OLED Yet – Powered by the revolutionary 4th Gen WOLED with Primary RGB Tandem technology, reaching up to 1500 nits of peak brightness and certified with VESA DisplayHDR True Black 500 for crystal-clear, high-contrast gameplay, even in bright environments. OLED with QHD 540Hz - HD 720Hz Dual-Mode - With VESA Certified Dual-Mode, enjoy UltraGear’s fastest performance with up to 720Hz—the highest refresh rate ever introduced. Seamlessly switch between QHD 540Hz for detailed visuals and HD 720Hz for ultra-fast action. High-speed bandwidth with DisplayPort 2.1 - The latest DisplayPort 2.1 on the 27GX790B delivers next-generation bandwidth optimized for ultra-high-speed gaming, supporting stable performance even at extreme refresh rates. Extending this connectivity, the USB-C port supports streamlined single-cable display output and data transfer.

User manual (PDF)

UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD, 540Hz@QHD), 0.02ms(GtG), DP2.1, VESA DisplayHDR™ True Black 500 vs similar monitors

	LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD	ASUS ROG Swift OLED PG27AQWP-G EDITION 20	ASUS ROG Strix OLED XG259QWPG Ace	LG 27GX790A-B 27″ 480Hz Monitor
Screen size	27 inch	27 inch	25 inch	27 inch
Resolution	2560 x 1440	2560 x 1440	1920 x 1080	2560 x 1440
Refresh rate	540 Hz	540 Hz	540 Hz	480 Hz
Panel	WOLED	WOLED	WOLED	WOLED
Response time	0.02 ms	0.02 ms	0.02 ms	0.03 ms
Released	2026	2026	2026	2026

Monitor arms that fit a 27-inch size

Check the monitor has VESA mounting holes and that its weight is under the arm's limit.

BenQ Original Stand, Monitor Arm-Ready. VESA Adapter for Studio Arm SCS01FDesk arm · Single
BenQ Studio Arm for iMac AM02Desk arm · Single
BenQ Studio Arm for Studio Display AM01Desk arm · Single
AISENS MR03-481 Monitor ArmStand · Single · 32 inch

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Questions about the UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD, 540Hz@QHD), 0.02ms(GtG), DP2.1, VESA DisplayHDR™ True Black 500

What are the main specs of the LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD?

27 inch, 2560 x 1440, 540 Hz, WOLED.

What screen size is the LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD?

27 inch.

What resolution is the LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD?

2560 x 1440.

What is the refresh rate of the LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD?

540 Hz.

When did the LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HD come out?

It was released in 2026/01 (LG).

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LG UltraGear GX7 WOLED 27-inch 4th Gen. QHD Gaming Monitorㅣ27GX790B with Dual-Mode(720Hz@HDBuy now