LG 39GX90SA-W Review: 39" OLED Ultrawide with webOS

5.0/5
High-End

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LG 39GX90SA-W OLED Monitor
★★★★★
5.0/5
💰
High-end
$600-$1200

⚡ Key Specifications

  • ▸ 39" OLED Ultrawide (3440 x 1440)
  • ▸ 240Hz Refresh Rate, 0.03ms (GtG)
  • ▸ Aggressive 800R Curvature
  • ▸ webOS 24 Smart Platform Built-in
  • ▸ USB-C (65W PD), HDMI 2.1, DP 1.4
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LG 39GX90SA-W at a glance

The LG 39GX90SA-W sits in a unique spot between the common 34-inch ultrawides and the massive 45-inch giants. At 39 inches, it offers more immersion without demanding the massive desk space of its larger sibling. It retains the aggressive 800R curve and 240Hz OLED panel performance but adds LG’s webOS smart platform, effectively turning this gaming monitor into a smart TV hybrid.

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Panel Type
OLED (WOLED), Anti-Glare
SPEC #1
Resolution
3440 x 1440 (WQHD)
SPEC #2
Refresh Rate
240Hz
SPEC #3
Response Time
0.03ms (GtG)
SPEC #4
Curvature
800R
SPEC #5
Ports
2x HDMI 2.1, 1x DP 1.4, 1x USB-C (65W PD)
SPEC #6
Smart OS
webOS 24
SPEC #7

The 39-Inch Sweet Spot?

For many gamers, 34 inches feels slightly too small for a truly cinematic wrap-around effect, while 45 inches can feel overwhelming (and suffers from lower pixel density). The 39GX90SA-W strikes a balance. With a pixel density of ~96 PPI, it’s sharper than the 45-inch version (~84 PPI) though still softer than a standard 34-inch 1440p panel (~110 PPI). The 800R curvature is the defining feature here—it brings the corners of the screen significantly closer to your eyes, creating an unparalleled sense of presence in first-person shooters and racing sims.

Do Smart Features Justify the Trade-offs?

The inclusion of webOS 24 is a double-edged sword. On one hand, you get native access to Netflix, YouTube, and GeForce Now without turning on your PC, along with a remote control. On the other hand, the hardware underlying these smart features imposes some limitations most PC users won’t like. Most notably, the USB hub is limited to USB 2.0 speeds, which is a bottleneck for high-speed peripherals like external SSDs or 4K webcams.

Gaming Performance

This is where the 39GX90SA-W shines. The 240Hz refresh rate paired with OLED’s near-instant 0.03ms response time delivers motion clarity that LCDs simply can’t match. G-Sync compatibility and FreeSync Premium ensure tear-free gaming. The HDR performance is stellar, with VESA DisplayHDR True Black 400 certification and peaks up to 1300 nits (at 1.5% window), making highlights pop against perfect OLED blacks.

Resolution
3440 x 1440
Refresh Rate
240Hz
Panel
OLED
Response
0.03ms (GtG)
HDR
DisplayHDR True Black 400
Curvature
800R
👍 _Bearcat29 (Reddit)

"Don't get me wrong it is huge but absolutely not too huge. Just about the perfect size for 80cm viewing distance (that's why it is curved at 800r)."

ℹ️ aPHAT88 (Reddit)

"I picked it up to use in the interim until the 5k2k model comes out. I like it so far although I’m not a fan of the webOS ui."

⚠️ ripsql (Reddit)

"Why not just go for the 34” oled? I really don’t understand spending more for a larger but same resolution monitor .. instead of a 34” 3440x1440, going for a 39” 3440x1440."

⚠️ isodevish (Reddit)

"I hope they make a bendable version of that because I can't tolerate 800R for anything productivity related."

Pros and Cons

Verdict

The LG 39GX90SA-W is a formidable choice for gamers who find 34 inches too small and 45 inches too big (or too blurry). It offers a unique form factor that maximizes immersion without sacrificing too much sharpness. However, the decision to limit the USB hub to 2.0 speeds to accommodate smart TV features is a disappointing compromise for a high-end monitor. It’s an excellent gaming display and a capable media center, but heavy productivity users might struggle with the aggressive curve and lack of high-speed connectivity.

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