LG 24GM77 24-Inch 144Hz Gaming Monitor Review

Early Verdict

If you can live without frame-rate matching, the LG 24GM77 is a great value in 144Hz gaming monitors. With some of the best stock performance we’ve seen in any category, you don’t have to adjust anything save brightness to see a superb image in all contexts. With its well-engineered gaming features, excellent performance and relatively low price, this is an easy recommendation.


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    Out-of-box accuracy, even better calibrated accuracy

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    high contrast

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    bright and sharp image

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    excellent motion-blur reduction

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    low input lag

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    solid build quality

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    side-mounted headphone jack


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    TN panel

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    no G-Sync or Active Sync

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    game modes introduce unwanted edge enhancement

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With many gamers waiting for AMD's FreeSync initiative to bear fruit or cheaper G-Sync-capable monitors to show up, it’s easy to forget that the prices for high-speed screens without those features are dropping to saner levels. A year ago, 144Hz displays in the 24-inch form factor were selling around $400. That was quite a premium when 60Hz panels went for $200 or less.

Today we’re looking at one such display – LG’s 24GM77. It won't sync to the output of your graphics card, but it does have many other features that will be of interest to gamers. In addition to a maximum refresh of 144Hz, you get an excellent blur-reduction option called Motion 240. There’s also a Black Stabilizer gamma control to aid in shadow detail rendering. If you like to change your picture to suit particular titles, there are six gaming modes that do just that. Finally, there’s a Dynamic Action Sync (DAS) option purported to cut input lag in half.

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Brand & ModelLG 24GM77
Panel Type & BacklightTN / W-LED, edge array
Screen Size & Aspect Ratio24in / 16:9
Max Resolution & Refresh1920x1080 @ 144Hz
Native Color Depth & Gamut8-bit / sRGB
Response Time (GTG)1ms
Video Inputs1 x DisplayPort, 1 x DVI, 2 x HDMI, 1 x VGA
Audio1 x 3.5mm headphone output
USBv3.0 - 1 x up, 2 x down
Panel DimensionsWxHxD w/base22.5 x 15.9 x 9.8in567 x 401 x 248mm
Panel Thickness2.2in / 57mm
Bezel Width.6in / 16mm
Weight11.9lbs / 5.8kg
WarrantyThree years

Like almost every other high-speed screen out there, the 24GM77 employs a TN-based panel. Naturally, this one uses a part manufactured by LG. It offers high brightness, an 8-bit color depth and again, refresh rates as high as 144Hz. The only capabilities gamers will miss are Nvidia's G-Sync and AMD's FreeSync technologies. We’ve already seen several monitors with G-Sync, and are starting to receive FreeSync-capable displays.

The white LED backlight dispenses with PWM (pulse-width modulation), which can cause flicker for some users, and exposes an excellent blur-reduction feature called Motion 240. We’re usually guarded in our opinions of backlight strobing because it can significantly reduce light output. Here, LG chooses to omit any sort of pulse-width adjustment, but it isn't missed. Our contrast tests show a mere 15-percent reduction in peak white level when Motion 240 is turned on.

Of course, the main reason to buy a monitor like this one is speed. Running at 120 or 144Hz means there is very little motion blur, even without backlight strobing. Also, you're able to enjoy the full performance of your high-end graphics hardware with v-sync turned on. Variable refresh technologies are great, but at the very least you need a monitor that won't limit your frame rates.

The 24GM77’s most attractive feature, in our opinion, is its price tag. Selling for around $300, it represents a good deal when G-Sync adds at least $100 to the cost of a 24-inch monitor. All we need to see now is good color accuracy, and that’s where our benchmark tests do the talking.

Correction: This article was updated at 2:15 pm ET to include the proper proper size of the monitor — 24-inches, not 27.

Christian Eberle
Contributing Editor

Christian Eberle is a Contributing Editor for Tom's Hardware US. He's a veteran reviewer of A/V equipment, specializing in monitors. Christian began his obsession with tech when he built his first PC in 1991, a 286 running DOS 3.0 at a blazing 12MHz. In 2006, he undertook training from the Imaging Science Foundation in video calibration and testing and thus started a passion for precise imaging that persists to this day. He is also a professional musician with a degree from the New England Conservatory as a classical bassoonist which he used to good effect as a performer with the West Point Army Band from 1987 to 2013. He enjoys watching movies and listening to high-end audio in his custom-built home theater and can be seen riding trails near his home on a race-ready ICE VTX recumbent trike. Christian enjoys the endless summer in Florida where he lives with his wife and Chihuahua and plays with orchestras around the state.

  • blackmagnum
    LG>BenQ>Asus= tough choices
  • lightsol
    so is it a 24" or 27" display?
  • Bezzell
    24" TN, 1080p? No variable refresh? No thanks.
  • chenw
    damn it, where was this monitor 6 months ago...
  • Mike Coberly
    24" TN, 1080p? No variable refresh? No thanks.
    so is it a 24" or 27" display?
    LG's website indicates that it is indeed a 24" panel, the title is incorrect in stating it is a 27"
  • alidan
  • wtfxxxgp
    Yup, this is a 24" not 27"
  • NinjaNerd56
    I got an AOC 27 inch display under $300 recently. No SYNC ability, but a really nice device that's excellent with the games I play.

    It's GAME mode is good, and I have done zero adjustment beyond that. If it lasts 2-3 years, then I can 'upgrade' at a much cheaper price to whatever sync de jour display I want.
  • JeanLuc
    For a gaming monitor to be released these days that does not to come with Gsync or Freesync capability is very short sighted by LG. Would the inclusion of a Freesync enabled 1.2a displayport really have delayed or added considerable costs to this monitor, LG?
  • Marcus52
    This article - seriously? You can't even get the size of the monitor right. And the price isn't anything special for a 24" 144 Hz TN panel, Asus has had one in that price range (under $300) for years now. In my mind these things make the entire article suspect.