LG UltraGear 27GX790A-B / MSI MAG 271QPX QD-OLED E2

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.

In QD-OLED, light from a blue OLED layer is converted to red and green by quantum dots; because each pixel emits its own light, blacks turn fully off.

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.

240 Hz shows 240 frames per second for smooth, clear motion in fast games, provided the graphics card can produce that frame rate. Adaptive-Sync matches the display’s refresh to the card’s frame rate to prevent tearing.

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

This is grey-to-grey transition time; OLED’s very fast transitions reduce motion blur, but it is not the same as total 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.

The wide gamut gives saturated colour in HDR and games; MSI states colour accuracy as ΔE ≤ 2.

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.

The HDMI 2.1 inputs support WQHD 240 Hz on consoles at 48 Gbps (Console Mode). USB-C with 15 W only charges small devices such as phones and is not enough to charge a laptop; the port runs at USB 2.0 speed and there is no separate USB hub.

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.

OLED brightness falls as the lit area grows; 1000 nits appears only in very small bright highlights. True Black 400 certifies deep blacks with at least 400 nits HDR performance.

Shows two sources at once: in PiP one is a small window, in PbP the two sit side by side.

OLED Care includes protection functions that reduce the risk of static images leaving marks (burn-in). With no fan, it makes no noise while running.

Terms may vary by country.