Asus MG278Q 27-inch QHD FreeSync Gaming Monitor Review

Reviews
By Christian Eberle
published

Recently we checked out Asus' MG279Q, a stunning-looking 27-inch IPS gaming monitor with FreeSync, 144Hz and a premium price. Today we're reviewing a cheaper alternative -- the TN-based MG278Q.

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Grayscale Tracking And Gamma Response

Our grayscale and gamma tests are described in detail here.

Aside from a little red push in the higher brightness levels, Racing is a decent fire-and-forget mode for the MG278Q. We found gains through calibration but if you don't have the means or desire, the picture looks just fine using its default settings. Other modes, like FPS, also have good grayscale tracking but less accurate gamma and color. We therefore recommend Racing as the go-to preset regardless of the monitor's intended use.

Usually a monitor's sRGB mode is pretty much spot-on but the MG278Q takes a small step backwards. The white point is decidedly cooler with visible errors at all brightness levels. With all Delta E values under five it's not a huge problem but Racing mode is better. Another thing you sacrifice in this mode is a brightness adjustment; output is locked at around 144cd/m2.

Calibrating the Racing mode produces the best possible result. All errors are now well-below the visible point and tracking is nice and linear. This is very good performance.

Here is our comparison group.

3.06dE is a barely-visible average so we think most users will be satisfied with an un-calibrated image from the MG278Q. If you're wondering about the sRGB mode, its average error is 3.79dE. Racing is clearly the best choice.

Calibration drops the average number more than 50 percent but the monitor' s fifth-place finish is unchanged. None of the displays have grayscale issues worth concern. Once again though, the MG279Q has taken the top spot. Its IPS panel is truly a premium part with a price to match.

Gamma Response

There are no gamma controls in the OSD but different picture modes modify the tracking. Racing mode looks like the above chart whether you calibrate or not. Overall performance is good but there are slight anomalies at 20 and 90 percent. Each represents luminance errors of less than 3cd/m2 so you're unlikely to see any issues in actual content.

In FPS mode the gamma is lighter at 10 and 90 percent, which will bring out highlight and shadow detail a little more. The tradeoff is a higher black level and possible clipping in the image's brightest areas. You'll also see some over-saturation of color in the mid-tones with this approach.

If you use the sRGB mode, gamma is slightly different once again. The tracking runs a little light but the hump at 90 percent is now gone. In practice it's close enough to the Racing mode that there's no visual difference.

Here is our comparison group again.

A .39 value range isn't too bad actually. All the monitors in the group offer excellent gamma tracking so the MG278Q's last-place finish isn't a big deal.

We calculate gamma deviation by simply expressing the difference from 2.2 as a percentage.

By staying close to 2.2 (2.19 actually), the MG278Q's average gamma is almost exactly on-spec. Only the Nixeus deviates by a visible amount; that monitor has two gamma settings both of which miss the standard by a similar amount. The others are close enough to each other to make comparing the results a wash.

Christian Eberle
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.

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13 Comments Comment from the forums
  • Rishi100
    I am flummoxed why even at this stage, the displays are being churned out with HDMI 1.4 and Displayport 1.2 standards. They should have been HDMI 2 with HDCP 2.2 and DP1.3.
    Reply
  • TeamColeINC
    From what I've seen in reviews so far, then TN model is better anyway. But I would think ASUS fixed all the issues that people were reporting with the IPS model...
    Reply
  • 10tacle
    The last time I tried an ASUS 1440p panel was with their PB278Q (60Hz IPS). The first one I got had terrible back light bleed on the left side and two dead pixels right in the middle. Couldn't live with that. So I returned it and got another. The second one was sealed up on backlight bleed (good enough for the typical PLS/IPS anyway) but had four dead pixels, two which were close together on the center right side and the other two in different spots but in the general viewing area. Again, couldn't live with it and returned for my money back.

    I hope their quality control has improved, because for a $500+ monitor, any dead pixels and manufacturing tolerance defects are unacceptable. I paid a little more for a Dell U2713HM and have been happy ever since. I'll be in the market for a 1440p G-sync next year as an SLI 970 owner and would not rule out ASUS if they have improved their quality control. One thing I am not clear on is if you can select custom Free-Sync or G-Sync frequencies to better match your GPU power beyond factory monitor Hz settings (90Hz, 120Hz, 144Hz).
    Reply
  • alextheblue
    At speeds below 40fps, you'll need to turn on V-Sync to prevent tearing, though by that point stutter is the bigger problem. It's better to either reduce resolution or turn down the detail level to keep frame rates above 40.

    Uh, what about turning on LFC? LFC will work on monitors with a good variable refresh range such as this Asus unit. I'd like to see that tested for those cases where you dip in frames occasionally.

    One thing I am not clear on is if you can select custom Free-Sync or G-Sync frequencies to better match your GPU power beyond factory monitor Hz settings (90Hz, 120Hz, 144Hz).

    Wait, what? As long as you're within the variable refresh rate range, you're good to go. If you want to save power and reduce the framerate on a low-demand (old) game something like FRTC should work if there's no in-game cap.
    Reply
  • 10tacle
    17162561 said:
    One thing I am not clear on is if you can select custom Free-Sync or G-Sync frequencies to better match your GPU power beyond factory monitor Hz settings (90Hz, 120Hz, 144Hz).

    Wait, what? As long as you're within the variable refresh rate range, you're good to go. If you want to save power and reduce the framerate on a low-demand (old) game something like FRTC should work if there's no in-game cap.

    No what I'm talking about are complaints about (and this was from G-sync users) that they couldn't set a custom refresh rate to something like 100Hz or 110Hz in the Nvidia control panel on a G-sync monitor to better match their GPU power FPS and cap it. Maybe something's changed or they didn't know what they were talking about (or doing).

    I don't have one so I can't comment. I overclock my 1440p monitors to 75Hz (Dell) and 90Hz (Crossover) and cap frames accordingly, but just have never been clear on what that meant to a G-sync monitor that advertises 120Hz/144Hz capability.
    Reply
  • M for Moartea

    No what I'm talking about are complaints about (and this was from G-sync users) that they couldn't set a custom refresh rate to something like 100Hz or 110Hz in the Nvidia control panel on a G-sync monitor to better match their GPU power FPS and cap it. Maybe something's changed or they didn't know what they were talking about (or doing).

    I don't have one so I can't comment. I overclock my 1440p monitors to 75Hz (Dell) and 90Hz (Crossover) and cap frames accordingly, but just have never been clear on what that meant to a G-sync monitor that advertises 120Hz/144Hz capability.

    I'm not sure I fully understand your concern but, if I may, I'll give it a try.
    As a user of Asus PG278Q (with G-sync) for a year now, I can tell you this much:
    G-sync, much like FreeSync, works within a frame rate range, depending on the monitor and not the adaptive sync technology behind it, in my case within 30-144Hz. Between that frame rate range, the refresh rate is variable and depends on how many FPS your GPU can push.
    This is where the similarities between the two stop because outside of that range the two technologies behave differently. Below the minimum range, 30 FPS in my case, the G-sync module automatically displays the same frame twice, making the frame rate appear double than what it is and the gameplay feel smoother. At the other end, G-sync module automatically caps your frame rate to the maximum refresh rate of your monitor (144 in my case).

    That being said, having nothing to do with these adaptive sync technologies, Radeons do have a frame rate target control feature in the Catalyst control center (or whatever it's called nowdays) for power savings reasons, feature that you don't have as a Nvidia user.

    Now, regarding your concern, a custom refresh rate simply defeats the purpose of having an adaptive sync technology and, outside of power savings reasons, I fail to see how a custom refresh rate target would help since G-sync (and FreeSync for that matter) already cap the refresh rate of your monitor "to better match their GPU power FPS".
    If you prefer a custom refresh rate, you can chose do simply disable G-sync and set your (G-sync enabled) monitor to a fixed refresh rate (in my case I have the following options: 24, 60, 85, 100, 120, 144 Hz).
    I hope that was helpful.
    Reply
  • Verrin
    At speeds below 40fps, you'll need to turn on V-Sync to prevent tearing, though by that point stutter is the bigger problem.

    This technically isn't true any more, if you are using the Crimson driver and have a panel with a maximum refresh rate that is 2.5 times greater than the minimum (e.g. 144Hz panels).

    AMD refers to this new tech as Low Frame Rate Compensation (LFC), and it effectively does the same as Nvidia's solution (although by different means) by duplicating frames to maintain the refresh rate above a minimum refresh value (such as 40Hz). I've been playing around with it on my 390X and my Acer XG270HU and it's been working great, no stutter or hitching, just the usual expected loss in fluidity from going that low in the first place.
    Reply
  • picture_perfect
    Tearing happens when fps are higher than hz (multiple frames per refresh appear as horizontal tears in time)
    Stutter/Judder happens when fps are lower than hz (multiple refreshes per frame appear as double vision judder)

    To sync the two:
    Freesync/G-sync adjusts a monitor's hz to match fps.
    V-sync adjusts fps to match a monitor's hz.
    Reply
  • Andrew Pacely
    This is cool and all... but where's that new 34 incher they revealed last September?
    Reply
  • jdwii
    Threw up a little when i heard TN, little to no excuse anymore not to own a IPS monitor since latency is as low as 4ms and i bet 99.9% of you guys can't tell the difference
    Reply