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The LG 45-inch UltraGear™ OLED WQHD 240Hz 0.03ms G-Sync Compatible 800R Curved Gaming Monitor with webOS, Model # 45GX90SA-B, has a native WQHD (3440 x 1440) resolution, which has a 21:9 Aspect Ratio (i.e., Ultrawide resolution). Your PS5 does not officially or natively support ultrawide (21:9) resolutions. The console is designed for a standard 16:9 aspect ratio. When connected to an ultrawide monitor, the PS5 will typically display a 16:9 image with black bars on the sides (pillarboxing)...^Ivan.
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