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Alienware AW3821DW Review: Smooth, Curved, Slick Ultrawide

Top-of-the-line 38-inch ultrawide

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Alienware AW3821DW
(Image: © Dell)

Our HDR benchmarking uses Portrait Displays’ Calman software. To learn about our HDR testing, see our breakdown of how we test PC monitors.

The AW3821DW switches automatically to HDR mode once you apply an HDR10 signal. All picture presets are still available, and they all make a visible difference in color and contrast. Standard works reasonably well, but the best HDR image results from a calibration in the Custom Color mode. Luckily, the same RGB settings work for both SDR and HDR.

HDR Brightness & Contrast

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Alienware AW3821DW

(Image credit: Tom's Hardware)
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Alienware AW3821DW

(Image credit: Tom's Hardware)
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Alienware AW3821DW

(Image credit: Tom's Hardware)

The AW3821DW is rated for 600 nits but we managed a peak reading of over 724 nits. We had to measure a window pattern to achieve this, and the level quickly dropped once we displayed a full pattern. Variable Backlight is locked on for HDR signals, but you can still pick from the three levels. Mode 0 provides the fastest switching and the greatest dynamic range.

Black levels are super low because the backlight is nearly turned off when a 0% signal is input. That results in an HDR static value of over 60,208:1, impressive performance. As an edge backlit monitor, its HDR image isn’t as dramatically improved as a zone dimming screen with the same test results, but the Variable Backlight feature definitely has a positive impact on HDR material.

Grayscale, EOTF & Color

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Alienware AW3821DW

(Image credit: Portrait Displays Calman)
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Alienware AW3821DW

(Image credit: Portrait Displays Calman)
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Alienware AW3821DW

(Image credit: Portrait Displays Calman)
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Alienware AW3821DW

(Image credit: Portrait Displays Calman)

The AW3821DW is one of the few HDR monitors that allows calibration in HDR mode. The first and third charts above show the fixed Standard mode. Grayscale runs a little blue as brightness increases, but the errors are minor. The luminance curve is a bit skewed, thanks to Variable Backlight. Using the RGB settings from SDR in the Custom Color mode improves grayscale tracking to where the blue errors only occur after the tone-map transition point. That means you’ll almost never see them in actual content.

Color tracking is solid with slight oversaturation of all inner primary and secondary targets. This is typical of the HDR monitors we’ve tested. Though not strictly accurate, it provides a nice bit of extra punch and helps differentiate HDR content from SDR. Our calibration (see our recommended settings on page 1) boosts hue accuracy and shows a positive visual effect.

Christian Eberle
Christian Eberle
Christian Eberle is a Contributing Editor for Tom's Hardware US. He's a veteran reviewer of A/V equipment, specializing in monitors.
6 Comments Comment from the forums
  • coloradoblah
    About 600 too expensive still
    Reply
  • Metteec
    Overall, thank you for a well-detailed review. I think another important point to mention is the warranty. The Alienware includes Dell's 3-year advanced replacement, meaning Dell will send you a replacement before receiving your broken screen. With so many comparisons to the Acer X38p, having a 2-year standard warranty, I think that Tom's should mention the support differential. Another important factor not evaluated is the noise. The AW3821DW is whisper quiet. The X38p has a noticeable fan noise that I can hear with headphones on if no sound is playing. The sound was driving me crazy.

    I have owned the X38p (returned) and now I own the AW3821DW and can confirm the AW3821DW's HDR is mostly trash, but the color accuracy, screen size, g-sync, brightness, and responsiveness make it one of the best monitors I have used. I was able to purchase for around $1,300 in the US with a 10% off coupon and their sale. I would not be surprised if you saw the monitor get to $1000 in six months.
    Reply
  • helper800
    coloradoblah said:
    About 600 too expensive still
    At this price range you mind as well grab a 48 inch LG CX when they inevitably go on sale. I just recently got the 55 inch LG CX at Costco for 1350. I wall mounted it and have it at a -16 degree angle above my other 2 monitors. I have not used it for any PC gaming yet as I am setting up a new desk as well but it looks great about 5.5 feet away and all I have to do is look up about +40 degrees or lean back in my chair. It primary purpose is not PC gaming, however, its for the consoles and watching content from my bed about 10 feet away.

    TLDR; why get this monitor for nearly the price of something so much better?
    Reply
  • coloradoblah
    helper800 said:
    At this price range you mind as well grab a 48 inch LG CX when they inevitably go on sale. I just recently got the 55 inch LG CX at Costco for 1350. I wall mounted it and have it at a -16 degree angle above my other 2 monitors. I have not used it for any PC gaming yet as I am setting up a new desk as well but it looks great about 5.5 feet away and all I have to do is look up about +40 degrees or lean back in my chair. It primary purpose is not PC gaming, however, its for the consoles and watching content from my bed about 10 feet away.

    TLDR; why get this monitor for nearly the price of something so much better?
    Yeah, im not a fan of non matte screens but the sheer size and contrast alone its a better buy
    Reply
  • helper800
    coloradoblah said:
    Yeah, im not a fan of non matte screens but the sheer size and contrast alone its a better buy
    It has a glossy finish but its bright enough to get rid of about 80% of glare. It was a big concern of mine but I am happy with the finish in the end. I have had some monitors with matte finishes that end up making the picture overall grainy looking which, in my opinion, is worse than glare.
    Reply
  • TacticalBeard
    Just grabbed this for 1100$ for Black Friday 2021.

    ive been using a 100hz 3440x1440 acer predator x34 since it’s been out 6 years now. Got lucky and grabbed it for a 700$ Open box steal back when they were new and everyone was sending them back because they had IPS glow in the corners.

    this has much faster nano IPS,144 refresh rate , slightly bigger at 38” but with the same pixel density being 3840x1600 21.45% more pixels the GPU needs to run but still keeping a 21:9 aspect ratio unlike the 49” Samsung G9 that’s it’s own uniqe aspect ratio that I doubt has much if any game support you

    It’s a solid improvement in IPS panel technology. I’ve never had an HDR screen so I’ll have to wait and see if I like this. even if it’s only HDR600 witch really seems to be the only real let down of this screen with pretty much every reviewer saying 1000HDR is when it starts to get good it makes me wonder why dell ddt push to make this premium display to have the last thing it needed to be perfect and left it with mediocre HDR . But for all I know 600HDR will blow me away when I first try it

    just need to figure out what I’m going to do with my x34 that’s still running perfectly fine
    Reply