LG UltraGear 27GX790A-B / MSI MPG 271QR QD-OLED X50

LG’s US spec sheet carries a 2024 copyright; LG Brazil lists the model as a 2025 product.

The actual viewable diagonal is 26.5 inches.

QHD at 27 inches means lower pixel density than 4K; small text looks less crisp but high frame rates are easier to reach on the GPU.

480 Hz means up to 480 frames per second; seeing that benefit requires the game and GPU to deliver close to 480 fps.

Grey-to-grey pixel transition time; it is not input lag.

1,300 nits applies only to small highlights covering 1.5% of the screen; on a full white screen OLED automatic brightness limiting kicks in.

OLED pixels can switch fully off, so black level is near zero; LG’s page notes the figure is measured at 25% APL.

The sheet lists a paper calibration report in the box.

True Black is the VESA HDR tier for very low black-level displays such as OLED.

Variable refresh matches the panel to the GPU frame rate to reduce tearing and stutter. LG’s page also lists VESA ClearMR 21000 certification.

FRL is the high-bandwidth transfer mode of HDMI 2.1. There is no USB-C video input.

No built-in speakers are listed.

It has a tool-free 1Click stand mount and hexagonal RGB lighting on the back.

The sheet does not list typical power consumption.

LG says the feature helps prevent burn-in from static high-contrast images left on screen for long periods but may not prevent all image retention.

About 9.3 kg with stand, about 5.1 kg without.