Cheap 4K 144Hz Gaming Monitor – AOC U28G2X Review

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4K 144Hz monitors aren’t exactly brand new, but since Asus’ fancy PG option would currently set you back a cool £3,300, the £590 AOC is asking for this U28G2XU seems like an absolute bargain. That price does beg the question though, is it actually something you’d want to buy? Well, let’s take a look at it and find out.

The U28G2XU is no slouch in the specs department. This is a 28 inch 3840×2160 IPS panel that can run at up to 144Hz. There is a catch there, I said “up to” for a good reason. This monitor comes equipped with 2 HDMI 2.0, and 2 DisplayPort 1.4 ports. Neither of those connections natively allow you to run at 4K 144Hz, as HDMI 2.0 caps out at 60Hz and DisplayPort 1.4 caps at 120Hz.

Luckily, if you have a graphics card that supports Display Stream Compression (DSC) you will be able to make full use of the 144Hz refresh rate, and even the full colour depth too. Unfortunately DSC is a feature that only made its way to graphics cards in the RTX 2000 and 3000 series NVIDIA cards, and RX 5000 and 6000 series AMD cards so anything outside that range will be capped at 120Hz on DisplayPort, or you can drop the colour depth down from 8bpc and get the full 144Hz at the expense of colours.

That also means if you were planning on picking this up for your Xbox Series X or PS5, the best it’ll do is 1440p 120Hz on the Series X and at that rate I’d rather get an actual 1440p 144Hz display instead, or if you are set on 4K find one with HDMI 2.1 support.

So, assuming you’ve got something connected to it, what’s the panel like? I’m actually really impressed, no, astonished at how fast this is. Despite being an IPS panel, if you have a look at the UFO test, with no overdrive enabled at all, there is less than half a frame worth of ghosting and the image is incredibly crisp and sharp compared to many panels that never fully finish drawing the frame before the next begins. If you set it to the “Weak” overdrive setting, it takes about 3ms for the next frame to be fully drawn, and about 6ms for the previous image to disappear. That’s pretty much a full millisecond per 144hz frame where you see nothing but the current frame, fully drawn.

Setting it to overdrive medium doesn’t speed up the transitions by all that much, but it does introduce a noticeable amount of overshoot, and setting overdrive to “Strong”… Yeah. The overshoot is so bad that the overshot frame is on screen until well after the next frame is fully drawn. Do yourself a favour and never set it to strong, or even medium. Weak is the perfect sweet spot.

When it comes to input lag, this one is a weird one. My time sleuth reported a shockingly high 9.2ms latency, admittedly over HDMI and at 1080p60, but compare that to the 1.9ms the 60Hz version of this very monitor, the U28G2AE, reported. Worlds apart. But, using NVIDIA’s LDAT tool to measure the total system or click to photon latency in CSGO the roles reversed and this XU model averaged just 27ms with a relatively consistent run with only the first shot being a bit of an outlier, whereas the 60Hz AE model averaged more like 70ms. The up-side is that the LDAT measurement is arguably more ‘real word’, and on this monitor it’s a decent result.

That’s the stats, but what’s it like to game on? Pretty good! You do need a properly high end card to get the most out of it, and in more demanding games even a 3090 is going to struggle at 4K and on higher settings, but sticking it on a lighter game like CSGO it’s wickedly fast and responsive. With how fast the panel is it’s pretty easy to see and aim at targets. If your FPS is dropping below 144Hz, or 120Hz in my 1080ti’s case, it does support Adaptive Sync between 48 and 144hz although AOC’s site suggests it’s not a “G-Sync Compatible” display. That doesn’t mean you can’t enable G-Sync, I gave it a try with little obvious problems, it’s just not certified by NVIDIA.

On the whole the gaming experience is pretty good, and luckily so is content consumption. For standard youtube or netflix shows it’s perfectly fine offering an obviously crisp image thanks to the resolution, but also vibrant colours. It lists a peak brightness of around 370 nits for SDR content or a peak of 460 nits in HDR, and it does sport the VESA DisplayHDR400 certification, although that’s the lowest rung on that ladder and the experience isn’t fantastic. Either way, it’s bright enough for most applications and looks good to the eye.

If you want to use this as both a gaming and creative option, it’s certainly not bad. It comes pre-factory calibrated to sRGB with a deltaE of 0.56 according to the calibration sheet in the box, and with the right settings should net you around 95% coverage of the DCI P3 spectrum, although in my testing at 120Hz and 8bpc it caps around 88% DCI P3 – although it’s sRGB mode snaps perfectly to the sRGB colour space making it a really good and accurate experience out of the box.

A few other bits, the stand is fully adjustable with height, tilt, swivel and rotation for portrait mode, you also get a USB 3.2 hub with a fast charging port built in and the on screen menu is controlled with downward facing buttons on the right hand side. I’d prefer to see the joystick style control we are seeing more often as it gets pretty uncomfortable and tedious to adjust multiple settings with this style. The menu itself is fine, it’s their standard layout, with a full tab for gaming settings although I should add that you can’t enable the backlight strobing feature with adaptive sync enabled. Personally I think the panel is fast enough without it and they normally give me a headache anyway so that’s fine for me.

So, is this worth buying? Well, looking at it’s competition there are a couple other options from the likes of Gigabyte and Asus that are in a similar price range, but none quite as low as this. Gigabyte’s model isn’t far off being £100 more, same for Asus’, and personally I’d say this is a great option. The only let down is the lack of HDMI 2.1. Looking at it in a more wider context, I’m still not 100% sure who this class of monitor is for, as you need a high end GPU but also the desire to play games at 4K rather than 1440p and you want it at high refresh rates, I just can’t picture that person in my head. But, if that is you, this is a great monitor and I think you’ll really enjoy it. If, like me, you’d rather play at 1440p I’ve already reviewed a whole host of options so check out some of my favourites in the cards above.