Name: LG UltraGear evo 39GX950B-B
Brand: LG

LG’s two headline numbers describe different pictures. At 5120 × 2160 the 39GX950B-B tops out at 165Hz. Switch to 330Hz and the signal drops to 2560 × 1080. That is a useful choice for someone who edits a large photo in the afternoon and plays a competitive shooter at night, provided the monitor fits the desk and the computer can feed it.

Display & Gaming

5120 × 2160 at 165 Hz
2560 × 1080 at 330 Hz

The native picture has about 11.1 million pixels, one-third more per frame than a 3840 × 2160 display. For a demanding game that is a substantial extra workload. The 330Hz mode halves both axes, leaving a quarter of the pixels per frame. If your graphics card already struggles at 4K, plan on changing settings before expecting high frame rates at full resolution. RTINGS also saw noticeable flicker with variable refresh enabled when frame rates fluctuated. ¹

Motion & HDR

Tandem WOLED
1500R curve
Adaptive refresh

RTINGS bought the exact 39-inch model and found crisp text, quick motion and small HDR highlights that stood out without a halo. It also found reflections distracting in a bright room. Place the display with windows to the side if possible. Console users should weigh a separate compromise. A 16:9 image normally occupies the center, leaving bars where an ultrawide PC game could use the full width. ¹

Design & Ergonomics

921.4 mm wide
322.8 mm deep on stand
10.7 kg with stand

Mark out that width and depth on the desk before ordering. The stand can leave a keyboard close to the front edge even on a surface wide enough for the panel. A monitor arm can recover some room, but check its rating for the panel’s weight without the stand and its curved size.

Connectivity

DisplayPort 2.1 UHBR20
2 HDMI 2.1 inputs
USB-C video with 90 W power

Leave the gaming PC on DisplayPort and use USB-C for a work laptop that accepts video over that connection. The monitor can return up to 90 W to the laptop. Check the rating on its usual charger if you also expect it to render or play games while connected. Two HDMI inputs leave room for another computer and a console without unplugging the PC. Each source still has to support the output mode you intend to use.

HDR Brightness & Color

1,500 nits at 1.5% APL
600 nits at 10% APL
99.5% DCI-P3

LG publishes two HDR brightness figures for different amounts of bright content. Its 1,500-nit rating applies to a patch covering just 1.5% of the picture. At 10% the rating is 600 nits. A small reflection on metal can therefore make a different impression from a broad white sky in the same game. The wide P3 gamut gives saturated effects room to stand out, though the accuracy of a particular editing setup also depends on its picture mode.

Alternatives

A conventional 4K screen is an easier fit if you mainly use a console or an application that doesn’t benefit from extra width. LG’s 45-inch model is a separate design with a different curve, so its measurements are a poor substitute when judging this one. ¹

Verdict

Buy the 39GX950B-B when both modes have a job and you’ve measured the desk. For a PC player who also reads or edits at the same station, the detailed native desktop may be the benefit that earns its space every day.

LG UltraGear evo 39GX950B-B review

Pros

Cons