Is the LG 27GN800-B good for competitive gaming?

Yes. It runs at 144Hz at 2560x1440 with a 1ms motion blur reduction rating, which keeps fast movement clear. It lacks the higher refresh rates and strobing features of premium esports monitors, but it is well suited to most competitive play.

Does it work with a PS5 or Xbox Series X?

It accepts 1440p over HDMI, which both consoles support, and can run up to 120Hz there. It does not support HDMI 2.1 features like 4K or variable refresh at 4K.

Can I adjust the height or rotate the screen?

No. The included stand only tilts. For height, swivel or pivot you need a VESA 100x100 mount or arm.

Does it have built-in speakers or USB ports?

No. There are no speakers and no USB hub, so you need external speakers or headphones and a separate USB setup.

Is it a good choice for photo or video editing?

It covers 99% sRGB, so it is fine for everyday editing and web content. It does not cover a wide gamut like Adobe RGB or DCI-P3, so it is not aimed at color-critical print or HDR work.

How does it compare with LG's Nano IPS UltraGear models?

It shares the 27-inch QHD 144Hz formula but uses a standard IPS panel instead of Nano IPS. The pricier models add wider color gamut, a height-adjustable stand and sometimes a USB hub.