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A 45 inch curved OLED gaming monitor in black with a height adjustable stand

LG Electronics

LG Electronics 45GX900A-B 45" OLED 240Hz gaming monitor

SKU CH-G4JA-NPV2T MPN 45GX900A-B

A 45" curved OLED gaming monitor with a 240Hz refresh rate, 0.03ms response time, and 98.5% DCI-P3 colour coverage

  • Screen size45 in (114 cm)
  • Display resolution3440 × 1440 (2K)
  • Refresh frequency240 Hz
  • Panel typeOLED
  • Pixel response time0.03 ms
  • HDR formatHDR10

Size 45"

  • 45-inch 800R curve wraps your field of view for deeper immersion
  • 240Hz refresh with 0.03ms response keeps fast motion sharp and responsive
  • FreeSync Premium Pro plus G-SYNC compatible prevents tearing across PC and console
  • OLED panel hits 98.5% DCI-P3 with 1,500,000:1 contrast for vivid colour and true blacks
  • 21:9 ultra-wide 3440x1440 gives more usable width than a 49-inch 32:9 display

45" 800R Curved OLED Gaming Monitor

This 45 inch UltraGear OLED panel delivers a 3440 x 1440 resolution across a steep 800R curve. A 240Hz refresh rate and 0.03ms response time keep motion sharp in fast titles. The 21:9 aspect ratio expands peripheral view for sim racers and strategy players.

Suited For Immersive Ultra-Wide Play

The 21:9 format and 800R curvature wrap the scene around the viewer, ideal for racing cockpits and wide-field shooters. Users who prefer a flat panel, a different aspect ratio or require higher typical brightness should consider other models.

240Hz Refresh Rate And 0.03ms Response

The combination of a 240Hz panel and 0.03ms gray-to-gray transition determines whether motion clarity meets competitive needs. If the target hardware cannot sustain high frame rates at 3440 x 1440, the speed advantage goes unused.

How it compares

Measured against everything we stock in Monitors for Gamers, at today’s prices. Recalculated every night.

Price $1,218.99
Pricier than about 93% of the 839 comparable items (median $189.99).
Screen size 45 in (114 cm)
Higher than about 95% of the 814 comparable items (median 27 in).
Refresh frequency 240 Hz
Higher than about 70% of the 735 comparable items (median 180 Hz).

Specifications

Product
Brand nameLG
Product lineUltraGear
Model name45GX900A-B
Part number45GX900A-B
Case colorBlack
Display
Screen size45 in (114 cm)
Display resolution3440 × 1440 (2K)
Refresh frequency240 Hz
Panel typeOLED
Pixel response time0.03 ms
HDR formatHDR10
Image brightness275 cd/m2
Screen curvatureCurved
Display formatWQHD
Variable refresh rateFreeSync Premium Pro (AMD Adaptive Sync)
Viewing angles178° (H) / 178° (V)
Screen ratio21:9
Contrast1,500,000:1
Color gamut coverageDCI-P3 98.5% (CIE1976)
Colors displayed1.07 Billion
Pixel pitch0.266 mm
DisplayHDR certificationDisplayHDR True Black 400
Audio & video
Integrated speakers2 × 7 W
Integrated webcamNo
Ports & slots
HDMI ports2 x HDMI 2.1
DisplayPort connectors1 x DisplayPort 1.4
Video connectors1 x DisplayPort 1.4 / 1 x USB-C (DP Alternative) / 2 x HDMI 2.1
USB connections1 x USB Type-C / 2 x USB 3.0 Type-A Downstream
Headphone jack4-pole (Sound+Mic)
Power
Power drawPower Save/Sleep Mode (Max): Less than 0.5 W
DC Off (Max): Less than 0.3 W
Power supply100–240 VAC, 50/60 Hz
Size & build
Stand adjustabilityHeight, Swivel, Tilt
VESA mounting pattern100 × 100 mm
Product dimensions21.3 in-26.1 in × 39.1 in × 13.3 in with stand
18 in × 39.1 in × 8.6 in without stand
Product weight29.8 lb with Stand
19.6 lb without Stand
Shipping weight18.87 kg
Package size1130 × 543 × 308 mm
In the box
In the boxHDMI cable, DisplayPort cable, USB Type-C cable, Power cord/adapter, Quick Setup Guide and Warranty information

Other versions of this model

1 more in the same range

Questions about this item

What graphics card output do I need to drive the 3440 x 1440 resolution at 240Hz?

You need a GPU with DisplayPort 1.4 or HDMI 2.1 bandwidth to run the 3440 x 1440 panel at its full 240Hz refresh rate.

Will my older GPU that only supports FreeSync standard still work with the FreeSync Premium Pro implementation?

Yes, the monitor's FreeSync Premium Pro is backward compatible, so a standard FreeSync GPU will still deliver variable refresh without tearing.

How can I verify the 0.03ms response time is active in games?

Enable the monitor's response-time overlay in the on-screen display; it will show the current GtG figure matching the 0.03ms spec during motion.

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