After all the benchmarks and hands-on tests are done, we find that the AOC U2879VF achieves all its design goals. While FreeSync may push it into the gaming category, it isn't a sharply focused product like the Acer XB280HK. The operating range is too small and input lag is too great.
AOC calls it a professional monitor and includes a factory-certified calibration with supporting data sheet to that effect. But we wouldn't place it high in that category either. In terms of accuracy it does extremely well in our tests provided one chooses the sRGB mode in the color temp menu. It can be calibrated manually but that won't unlock its full potential. The only drawback of that preset is its fixed output level. That didn't bother us too much though, being that it's only 28cd/m2 brighter than our preferred 200cd/m2.
Contrast is roughly equal to the other 28-inch TN Ultra HD displays we've tested. This makes sense since AOC is using the same Innolux panel seen in every other monitor of this format. This particular example seems to have slightly better viewing angles than the competition but otherwise, image quality is pretty much the same. The sRGB mode gives it a decent advantage in color accuracy though.
For general use with some requirement of color accuracy and casual gaming, the U2879VF is a solid choice. Like all AOC products, it represents excellent value. In fact, among all Ultra HD displays, it's one of the least-expensive. Considering that it has FreeSync, uniformity compensation and extra-accurate color, it's probably one of the best values going right now. And don't forget that HDMI 2.0 input—not many screens are shipping with that version at this writing.
About the only things we could wish for is a stand with more adjustments, a larger FreeSync range and better input lag. But these are minor flaws when you're paying less than $450 for an Ultra HD screen. It isn't stellar in any one area but it checks nearly every major box with credible performance. And it comes packaged in a chassis of good build quality.
For decent all-around performance, thoughtful design, excellent out-of-box color accuracy and the addition of FreeSync, we're giving the AOC U2879VF our Tom's Editor Approved Award.
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Christian Eberle is a Contributing Editor for Tom's Hardware, covering Monitors.
The monitor is for the present 4k at 60hz even the prices it's good for the spec.
The speed of hz and the resolution are two different things, of course you will get higher hz at lower resolution. In a near future it will be 4k with 120hz or 144hz, coz 4k will be standard for 5 years as 1080p and 1440 or qhd will just be a transitition as was 720p.
You need 2.5X minimum ratio for asynchronous mode (i.e. 30 Hz to 75Hz) or you have no support below 40Hz.
With the range being so low you are popping in and out of the smoother asynchronous mode any time you go above or below this. If it's setup for VSYNC ON you'll go from smooth gameplay to STUTTERING below 40FPS (or screen tear if setup for VSYNC OFF).
Same goes for above 60FPS (though I think you can force a Global cap but you have to experiment with that and it may have to be a bit below 60FPS).
*If you have a 30Hz to 144Hz it's far better. Not only is it hard to go over 144FPS, but for demanding games (or sudden drops even if good FPS) you CAN stay in asynchronous mode.
The REASON is that AMD has no module like GSYNC does. So if you drop to 29FPS then the drivers tell the GPU to send each frame 2X so the monitor gets 58FPS. You still see it as 29FPS but a SMOOTH 29FPS because you stay in asynchronous mode so the monitor draws each frame as it gets it.
There is a small DELAY in doing this so you can't get by with just 2X the range. So again, for the 40Hz to 60Hz range if you drop to 39FPS it doesn't work.
**IMO they shouldn't even sell Freesync monitors like this. If you don't understand what's going on you're going to have an inconsistent experience with many games being smoother then stutter or tear constantly.
Umm, ya? That's the underlying point of my entire post! To expand, I am not willing to spend money on a monitor that is "for now" ok, when I find the 1440 experience (on IPS panels) so good. Since I run 27 now, why go a minor increase for a 4K panel that won't look as good while gaming, i.e. low frame rates? And to get even more specific - I am team green so I wouldn't buy an FS monitor in the first place! :lol: