A 45-inch OLED monitor is the kind of product most people price out of curiosity and then close the tab. For now the tab may stay open a little longer, because LG’s 45-inch UltraGear OLED (45GX900A-B) monitor drops from $1,699.99 to $899.99 on Amazon for Prime members, 47% below its list price. It is still a lot of money for a screen, and I won’t pretend otherwise, but it moves this model out of the range where only a handful of enthusiasts would look at it.
More Screen Than a 49-Inch Super Ultrawide
The size needs some explaining, since 45 inches in a 21:9 format is taller than the number suggests. LG says the panel has more screen area than a 49-inch monitor in the wider 32:9 format, and it bends that surface into an 800R curve, which is steep: the edges of the image come around toward you and fill your peripheral vision in a racing or flight game. The resolution is 3440 x 1440, and this is the compromise I’d weigh first. Spread over 45 inches, that works out to roughly 83 pixels per inch, so text in a spreadsheet or a browser will look softer than on a 34-inch monitor with the same pixel count.
For games, the argument is speed. The panel refreshes at up to 240Hz with a 0.03ms gray-to-gray response time, and it supports both AMD FreeSync Premium Pro and Nvidia G-Sync compatibility to keep frames in step with the graphics card. LG adds a set of on-screen aids: an FPS counter, a crosshair overlay, a Black Stabilizer that lifts dark areas so that whatever is hiding in a corridor is visible, and Dynamic Action Sync to cut input lag.
Then there is the picture itself. OLED pixels switch off individually, which is how LG reaches a 1.5M:1 contrast ratio and the DisplayHDR True Black 400 certification, with coverage of up to 98.5% of the DCI-P3 color space. The 1,300-nit peak brightness in the listing comes with a footnote: it is measured at an APL of 1.5%, meaning on a very small bright area such as a streetlight or a muzzle flash, and a full white screen will be dimmer. The surface has an anti-glare treatment, and the display carries UL verifications for flicker, glare and low blue light.
Connections cover a gaming PC and a console at once, with HDMI 2.1 and DisplayPort 1.4, plus a USB-C port that delivers 65W of power. That last one is the detail I like for a desk shared between work and play, since a laptop can send its image and charge over a single cable during the day. On the question every OLED buyer asks, LG’s two-year limited warranty includes the panel, and the monitor has care tools such as pixel cleaning. The Amazon rating is 4.2 out of 5, though from only 137 reviews.
A Prime membership is required for this price: the LG UltraGear 45GX900A-B is $899.99 on Amazon, against a list price of $1,699.99, and Amazon marks it as a limited Prime deal. The price applies to the 45-inch model, one of five sizes and styles in the same listing, and returns are free.