LG 45GX90SA-B 45″ 240Hz Monitor

45 inch · 3440 x 1440 · 240 Hz · OLED

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Screen size 45 inch
Resolution 3440 x 1440
Refresh rate 240 Hz
Panel OLED
Response time 0.03 ms

LG 45GX90SA-B 45″ 240Hz Monitor is a 45-inch monitor with 3440 x 1440 resolution, a 240 Hz refresh rate and OLED panel. The high refresh rate makes fast games look smoother. It came out in 2025.

Released: 2025-03-22

Specifications

Key specs

Screen size: 45 inch
Resolution: 3440 x 1440
Refresh rate: 240 Hz
Panel: OLED
Response time: 0.03 ms
Released: 2025-03-22
Part number: 45GX90SA-B.AEK
EAN / UPC: 8806096429990

Display

Display diagonal: 114.3 cm (45")
Display resolution: 3440 x 1440 pixels
HD type: Wide Quad HD
Native aspect ratio: 21:9
Display technology: OLED
Panel type: OLED
Display brightness (peak): 1300 cd/m²
Display brightness (typical): 275 cd/m²
Anti-glare screen: Yes
Screen shape: Curved
Screen curvature rating: 800R
Contrast ratio (typical): 1500000:1
Maximum refresh rate: 240 Hz
Viewing angle, horizontal: 178°
Viewing angle, vertical: 178°
Display number of colours: 1.07 billion colours
Response time (fast): 0.03 ms
Pixel pitch: 0.303 x 0.303 mm
High Dynamic Range (HDR) supported: Yes
High Dynamic Range (HDR) technology: DisplayHDR 400 True Black, Dynamic Tone Mapping
DCI-P3 coverage: 98.5%

Performance

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

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Multimedia

Number of speakers: 2
RMS rated power: 7 W
Built-in speaker(s): Yes

Design

Market positioning: Gaming
Product colour: Black
Illuminated stand: Yes
Feet colour: Black

Ports & interfaces

USB Type-A downstream ports quantity: 2
USB Type-C downstream ports quantity: 1
USB Power Delivery (USB PD): Yes
USB Power Delivery up to: 65 W
HDMI: Yes
HDMI ports quantity: 2
HDMI version: 2.1
DisplayPorts quantity: 1
DisplayPort out version: 1.4
Headphone out: Yes

Network

Bluetooth: Yes
Ethernet LAN: Yes

Ergonomics

VESA mounting: Yes
Panel mounting interface: 100 x 100 mm
Height adjustment: Yes
Pivot: Yes
Swivelling: Yes
Tilt adjustment: Yes

Power

Energy efficiency class (SDR): F
Energy efficiency class (HDR): G
Energy consumption (SDR) per 1000 hours: 46 kWh
Energy consumption (HDR) per 1000 hours: 53 kWh
Power consumption (off): 0.5 W
AC input voltage: 220 - 240 V
Energy efficiency scale: A to G

Weight & dimensions

Width (with stand): 992.7 mm
Depth (with stand): 338.6 mm
Height (with stand): 661.7 mm
Weight (with stand): 13.5 kg
Width (without stand): 992.7 mm
Depth (without stand): 218 mm
Height (without stand): 457 mm
Weight (without stand): 8.9 kg

Other features

Brand specific technologies: Black Stabiliser
Picture processing technology: LG AI Picture
FPS counter: Yes
Hardware calibration: Yes
Warranty period: 2 year(s)

Check the manufacturer's page before buying.

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About this product

The 240Hz OLED Smart gaming monitor that’s ahead of the (800R) curve The huge 45” WQHD OLED with a steep 800R curve and up to 1300 nits (APL 1.5%) peak brightness pulls you deep into the action, while a 240Hz refresh rate and 0.03ms response time keep gameplay insanely fast and smooth. Plus, LG’s webOS lets you stream your favorites and cloud game—all from one epic screen. Up to 240Hz & 0.03ms – Outrageous OLED Gaming Speed Game at the speed of OLED with an ultra-fast 240Hz and near instantaneous 0.03ms (GtG) response time. The faster speed lets you respond quickly to opponents and enjoy smoother scenes with less lag or ghosting. Your Favorite Streaming Services Plus Cloud Gaming Thanks to webOS24, find your favorites fast with built-in access to Netflix, Prime Video, the Apple TV app, Disney+, HBO Max. And over 300 free LG Channels with everything from comedy to movies to sports. Game without a PC or console! Connect to your favorite cloud gaming services such as NVIDIA GeForce NOW, Amazon Luna, and Blacknut directly from the webOS home screen. Ultimate Frame Sync: FreeSync™ Premium & G-SYNC® Compatible Say goodbye to screen tearing and stutter.

45GX90SA-B vs similar monitors

	LG 45GX90SA-B 45″ 240Hz Monitor	LG 39GX90SA-W.AAU 39″ 240Hz Monitor	LG 32GX870B-B 32″ 240Hz Monitor	LG 32GX870B-B.AEU 32″ 240Hz Monitor
Screen size	45 inch	39 inch	32 inch	32 inch
Resolution	3440 x 1440	3440 x 1440	3840 x 2160	3840 x 2160
Refresh rate	240 Hz	240 Hz	240 Hz	240 Hz
Panel	OLED	OLED	OLED	OLED
Response time	0.03 ms	0.03 ms	0.03 ms	0.03 ms
Released	2025	2026	2026	2026