AOC Agon AG254FG Review: Blinding Speed, Accurate Color

A 24.5-inch IPS gaming monitor with 360 Hz, Adaptive-Sync, HDR and Nvidia’s Latency Analyzer

AOC Agon AG254FG
(Image: © AOC)

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In addition to excellent contrast, the AG254FG sports some of the best out-of-box color accuracy I’ve experienced. It’s a pro-level display for sure.

Grayscale and Gamma Tracking

Our grayscale and gamma tests use Calman calibration software from Portrait Displays. We describe our grayscale and gamma tests in detail here.

I’m always satisfied when I can calibrate a monitor to less than 1dE grayscale error. When one comes from the factory at that level, I’m impressed. The AG254FG clearly doesn’t need to be calibrated. Just leave Game Mode off and color temp on Warm to get the same great result I did.

Of course, I tweaked the RGB sliders just to see if I could make it better, and I managed a 0.26dE gain, tiny and completely invisible. Gamma in either case is a tad light with dips at 10 and 90%. This doesn’t have a huge impact on image quality as the tracking is straight. If you want a darker presentation, change Relative Gamma to +0.2 in the Luminance menu.


The AG254FG clearly needs no adjustment, but if I can lower the value from 0.94dE to 0.68dE, I call that progress. Yes, it’s just a matter of ego. There is no visual difference in the image after calibration. Unchanged, the AOC wins the day. After all the screens are calibrated, it slips to fifth, but since all the screens are under 1dE, there is no actual difference in their images when compared side by side.

The AG254FG’s gamma tracks straight enough to beat out the other screens in the range of values test, but with a 4.09% deviation from 2.2, it places fifth. Again, that’s a small difference in a group of monitors that are all excellent. The AOC’s advantage is that it can run with the group at its default settings.

Color Gamut Accuracy

Our color gamut and volume testing use Portrait Displays’ Calman software. For details on our color gamut testing and volume calculations, click here.

The AG254FG has astoundingly accurate color gamut accuracy. It’s rare that any monitor, even a professional one, can beat 1dE in my color test. The AOC is already at the highest level before I’ve changed a single setting. Calibration makes no visual difference but drops the value slightly. It truly doesn’t get better than this. My only wish is that the gamut was larger. The 360 Hz monitor class has not yet embraced extended color.


The AG254FG would win this comparison with or without calibration, and that’s impressive. It’s also impressive that all the screens here are below 2dE average gamut error. There’s nothing to complain about with any of them.

The one bummer here is that the AG254FG doesn’t have a wide gamut. The other screens are sRGB also, but they push the envelope more, up to 112.83% from the Alienware. A bit more color would be nice here.

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.

  • Sleepy_Hollowed
    Wow, thank you for the review, what an impressive monitor.

    I'd say it's almost perfect, I'd prefer it to be ultra-wide 1080p, but 1080p works just fine for high refresh rate gaming/rendering.

    I don't think I can play anything at max resolution at that refresh rate without DLSS or FSR and some tweaking even at 1080p, but it'd be interesting revisiting games at that refresh rate.
  • Kridian
  • DougMcC
    Not going to be buying another monitor without 4k+. Where's my 4k240+ at?