LG UltraGear 27GX790A-B / LG UltraGear OLED 45GR95QE-B

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.

800R means the screen curves like part of a circle with an 800 mm radius, wrapping the edges around your view. At 45 inches, 1440p gives low pixel density: up close, text and fine detail look less sharp than on a 27-inch 1440p screen.

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.

Hardware calibration writes settings into the monitor itself through LG Calibration Studio, so the colour setup stays with the monitor even if the computer changes.

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.

Box contents can vary by country.

240 Hz shows very smooth motion when a game approaches 240 frames per second, which needs a powerful graphics card. 0.03 ms grey-to-grey describes the fast transition of OLED pixels; it is not total input lag.

LG’s typical brightness refers to a full-screen SDR image; with self-emissive OLED pixels black switches fully off, giving very high contrast.

G-SYNC Compatible and FreeSync Premium match the refresh rate to the graphics card’s frame rate to reduce tearing and stutter. HDR effect is a picture mode that adds HDR-like contrast to SDR content in software; it is not real HDR.

Black Stabilizer brightens detail in dark scenes; Dynamic Action Sync is a mode that reduces input lag.

PiP shows a second input in a small window over the main picture, for example a PC and a console at the same time. LG does not list PbP (side-by-side split) for this model.

DSC (Display Stream Compression) compresses high-bandwidth signals such as 3440 × 1440 at 240 Hz over DisplayPort 1.4 without visible loss. With the USB upstream connected, the monitor’s USB-A ports act as a hub for the computer. A headset with a mic plugs into the 4-pole jack; DTS Headphone:X adds virtual surround. No built-in speakers are listed.