LG 38UC99 38-inch Curved Ultra-Wide FreeSync Monitor Review

LG redefines the “ultra” in ultra-wide with its 38" 38UC99. It’s a curved IPS panel with 3840x1600 pixels, FreeSync, and 75Hz operation. We’re checking out this sleek white behemoth today.

There is nothing like gaming on a large screen. Those with projectors or big-screen HDTVs will know what I mean, but if your computing is limited to a desktop, an ultra-wide monitor can create an immersive feel in a smaller space. Of course if you have about 36" of width to devote to a display then we have a product for you. LG has gone big with 38UC99, its new 38" curved ultra-wide monitor.


At around $1500, this is without question a premium product. But you get a lot for the money here. At the core is a 38" (37.5" viewable) IPS panel capable of 300cd/m2 output. Now add a reasonable 2300mm-radius curvature. At first glance it may seem extreme, but thanks to the extra width, it reads more like a 34" screen with a 3000mm radius. There is no image distortion, and uniformity looks to be exemplary. Pixel density is 111ppi, which is almost exactly the same as a 27" QHD panel.

Since gamers are the principal buyers of displays like this, LG has included features aimed at those users. FreeSync is supported from 52-75Hz. That’s a fairly narrow range, and we’ll have to see how that lower limit shakes out in our gaming tests. Since resolution is a high 3840x1600, we’re expecting to see performance similar to the Ultra HD displays we’ve reviewed.

The 38UC99 is the first monitor we’ve tested that includes a USB-C port. It can accept video and audio signals if you have a compatible video card. Or it can be used as an upstream port, or a quick-charge jack for mobile devices. Blur-reduction, not something commonly seen in FreeSync displays, is also on the feature list. Like its G-Sync counterpart, ULMB, it can’t be used in concert with adaptive-refresh.

LG gives audio some serious attention with two built-in 10W speakers. You can also enjoy them with a Bluetooth connection to your phone or tablet. It looks like a comprehensive package that should appeal to those willing to pay a premium price. Let’s see how it measures up.

Packaging, Physical Layout & Accessories

LG ships the 38UC99 in a large carton that provides adequate protection for the monitor. Our sample arrived unscathed, but the box could be a little thicker, just to add a little more foam packing. The curvature is secured by molded blocks, so it will stand up to some abuse, but when you’re mail-ordering a display this expensive it always pays to inspect upon arrival.

The stand is assembled by attaching the base to the upright with two captive bolts. Then you snap it onto the panel’s back. A small button separates the two parts if you want to use your own mounting system.

Bundled cables are finished in all white to match the monitor’s trim. They are extremely thick and of very high quality. The power supply is a large brick, also white. For video connections you get USB-C, DisplayPort, and HDMI. A USB-C to B adapter is also included. A CD contains OnScreen Control and Screen Split 2.0 software plus a full user’s guide.

Product 360

The 38UC99 strikes quite a pose on any desktop and will certainly be the center of attention at the office unless everybody gets one. Be sure to measure your space before committing. The base footprint is small but you’ll need almost three feet of width to accommodate the panel. From the front, it appears bezel free when turned off, but a thin 11mm frame appears around the image when the power’s on. It’s flush with the anti-glare layer for a monolithic look. That layer will control reflections well, but take care with harsh light sources like desk lamps and windows. Color can be picked up in the screen as well, which I learned when I wore a red shirt during testing.

The rest of the chassis is made from shiny white plastic except for the base, which is matte silver. All parts are very solid and free of squeaks or wobbles. Unusual for this display size is a height adjustment. The upright is spring-loaded with ideal tension to provide smooth movement through a 4.4" range. You also get 20° backward and 5° of forward tilt. There is no swivel available.

OSD control is contained in a single tiny joystick at the bottom center of the panel. Pressing it brings up a small menu from which you can change inputs, power down. or engage the full menu. It makes navigation quick and easy. It also doubles as a power LED that emits a soft white glow.

Also on the bottom are two large speaker grills that fire downward. They boast 10W of power each and are tuned to supply extra bass. Thanks to their size, they deliver fairly well on that promise. They’ll play loud enough to satisfy without distortion. LG has definitely gone above the norm in the built-in audio department.

The curve is relatively subtle at 2300mm. That may sound extreme, but remember that this panel is wider than any other we’ve tested. You can see from our top-down photo that it isn’t too severe. There is no visible image distortion nor is uniformity affected.

From the side, the 38UC99 looks a little chunky, but that’s not surprising considering its size. Internal components are concentrated in a bulge that allows a thinner profile at the top. A small cable keeper snaps onto the upright to help tidy up your desk.

Around back is a 100mm VESA mount and a well-stocked input panel. You get two HDMI 2.0 ports plus a single v1.2 DisplayPort. The USB-C port can accommodate video and sound from an appropriately-equipped computer or serve as a quick-charge plug. Two USB 3.0 downstream ports and a headphone jack complete the connection options.

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  • Warsaw
    Just have to sell my kidney now to get one....
  • Geekwad
    Looks like a great professional monitor, but not gaming (though I'm really happy to see the FreeSync adder anyway). If the range was ~35hz to 75hz, it'd be very different.

    Still, this looks to be a really great product for content creators.
  • falchard
    For the price you can get 3 of LGs top range 27" 4k ips monitors which would probably be more effective. Still it's a nice halo product for selling panels.
  • ap3x
    it runs at 75hz by the way and it supports freesync. I have the 34UM95 which was the first model they release and it is fantastic for productivity and great for strategy games but not as much for FPS's. This monitor would be great all around and much better than having 3 separate monitors at 4k since that would basically difficult to run at any resolution that would take advantage of 4k x3. The immersion would also not be much better in that configuration because you already have to move your head to look at things with an ulrawide. 4k peripheral monitors is a waste anyway even if you could run it.
  • Kowmander
    The price of my Seiki 40" 4k makes me happier than the extra features I'm missing. But I do see the value of a curved screen at that width + desktop viewing distance.
  • ubercake
    23Hz range for freesync?

    Just plopping "freesync" in there for the sake of being able to say "freesync" is weak.

    That said, I think LG IPS panels are the best.
  • falchard
    I am more surprised at manufacturers refusing to add freesync verse those that tack it on. A monitor with displayPort and neither gsync or freesync is baffling
  • Niva
    This is one amazing monitor. For the first time I'm seeing something which makes me consider my 30" Dell long in the tooth.
  • falchard
    You could also wait just a little more. LG tvs are starting to get cheaper Oled and HDR. We could see these coming to monitors in the next 2 years.
  • zon
    I would like to see this monitor go up against an Samsung CF791 when it gets released.
    Still don't get why TV's are HDR and not PC monitors yet. OLED is understand able with the issue with the blue sub pixel and the burn-in. But heard they fixed the blue sub pixel to an extent.
  • gamebrigada
    Just because it has a small range of freesync doesn't make it bad. I have a 34UC88 that only has a 20hz range in freesync. It can be hard to stay in that range, but that doesn't mean it doesn't work. Generally games don't stumble worse than a 20fps drop in some scenes unless you play on complete potatoes. I've had no problems staying in the range.
  • Adarious
    I could be wrong here...but wasn't the big focus on freesync/gsync in terms of refresh rate because it could hit 120/144/165hz refresh rates? I think a 4k monitor at this point is overkill; 2k is what video cards are able to deal with in terms of gaming.
  • AsaDexter
    Something of note. I have the LG 34UC87C-B. I have really enjoyed the monitor but recently noticed an image issue that seems to be getting worse. I provided photos and a description to LG about and received a response that stated "I am afraid the unit is defective," and they asked for information to replace it. When I followed up a new rep said I was two weeks outside of the one year warranty and would have to prove that the monitor had a manufacturers defect by taking it to shop that is over an hour away and paying them to look at it. I was going to buy the 38" but after this experience, have no more interest in their products. MSRP on my 34" is listed as $999, so customer service is probably the same for the 38".
  • chicofehr
    I want a 48:10 or 48:9 monitor that can replace a triple monitor setup to get rid of bezels completely.
  • Realist9
    Standing by for G-sync version.

    Also, that is an odd res. Anyone that gets something like this better make dang sure the games they play will even display at that res.
  • Larry Litmanen
    Widescreens with resolution above 1080 and with screen size above 30 inches are honestly worth every penny.

    I have a Dell U3415W and there are so many benefits and improvements, tons of space for Excel, you can split a screen any way you want (i like a 3 way) and gaming is so immersive.
  • bananaforscale
    That's not all that much wider than 21:9 (2.4:1 vs 2.33:1).
  • sillynilly
  • itsmedatguy
    I feel pretty happy seeing this at $1500. Picked up a 43" Philips 4K IPS monitor for $700 a few weeks ago. It's pretty huge so I just mounted it and moved my desk back from it, looks gorgeous. And now it doubles as an awesome TV in my bedroom too
  • SiggeLund
    I don't get it. I honestly don't. Who would have this huge budget for a monitor, and be cheap enough to buy AMD GPU instead of a proper nVidia? If this thing had G-Sync I would be selling my wife's left kidney to buy it right now.