KOORUI 27 Inch Gaming Monitor Review UK 2026

I’ve spent over a decade staring at displays, and here’s what I’ve learned: your graphics card can pump out 200fps, but if your panel can’t keep up, you’re still seeing blur and ghosting. The screen is where all that silicon actually turns into something you can experience. Get this bit wrong and you’ve bottlenecked your entire setup at the very last step.

Which brings me to the KOORUI 27 Inch Gaming Monitor. I’ve been testing this display for two weeks now, and it’s one of those monitors that makes me appreciate how far the mid-range market has come. We’re talking proper specs that would’ve cost £500+ just a few years back, now sitting in a much more accessible price bracket.

The 170Hz refresh is native, not some dodgy overclock that introduces frame skipping. I’ve verified this with a pursuit camera, and it’s delivering all 170 frames without dropping any. That’s proper.

Here’s what I love about this panel choice: KOORUI hasn’t tried to be clever with VA for fake contrast numbers. They’ve gone with Fast IPS and embraced what that technology does well. The viewing angles are genuinely excellent (I can sit off-axis and colours barely shift), and the response times are quick enough for competitive gaming.

The trade-off? Contrast. You’re getting around 1100:1, which is standard IPS territory. In a bright room, this is fine. In a dark room, you’ll notice the slightly elevated black levels compared to a VA or OLED panel. But that’s the IPS compromise, and it’s one I’m happy to make for the motion clarity.

I’ve also checked for IPS glow (that annoying backlight bleed you get in the corners). There’s a bit there if you’re looking for it in a pitch-black room, but it’s well-controlled. I’ve tested budget IPS panels with far worse uniformity issues.

Look, the “1ms” claim on the box is rubbish. That’s a best-case scenario measurement that never happens in actual use. Real-world response times sit around 4-5ms GtG, which is genuinely good for an IPS panel. I’ve tested this with UFO Test and pursuit camera photography, and the motion clarity is excellent for fast-paced shooters. There’s minimal trailing, and crucially, the overshoot is well-controlled.

The overdrive settings matter here. KOORUI gives you Off, Normal, Fast, and Fastest. I’ve spent hours testing each one, and Fast is where you want to be. Fastest introduces visible inverse ghosting (those annoying halos behind moving objects), whilst Normal is a bit too slow. Fast hits the balance perfectly.

Input lag is excellent at 3.2ms. That’s low enough that even competitive gamers won’t notice any delay between mouse movement and on-screen response. Combined with the 170Hz refresh, this monitor feels incredibly responsive in games like Counter-Strike 2 and Valorant.

I’ve measured this panel with my X-Rite i1Display Pro, and the results are better than I expected at this price point. The sRGB coverage is complete, and you’re getting 82% DCI-P3, which is respectable. That wider colour gamut makes HDR content look more vibrant, even if the HDR implementation itself is limited (more on that in a moment).

Delta E averaging 2.1 is genuinely good. Anything under 2 is considered imperceptible to the human eye, and whilst this monitor sits slightly above that threshold, you’d need a reference monitor side-by-side to spot the difference. For gaming, it’s more than accurate enough.

Right, let’s be brutally honest: the HDR on this monitor is completely pointless. With only 380 nits peak brightness and no local dimming, enabling HDR just makes the image look washed out. The monitor can decode an HDR signal and display the wider colour gamut, but without the brightness or contrast to back it up, you’re better off leaving HDR disabled. This is a checkbox feature to tick on the spec sheet, nothing more.

I’ve tested HDR in several games (Cyberpunk 2077, Forza Horizon 5, The Last of Us Part I), and in every case, SDR mode looked better. The lack of local dimming means bright highlights don’t pop, and the limited peak brightness means you’re not getting that HDR punch. If you want proper HDR, you need to be looking at DisplayHDR 600 certified monitors at minimum, or ideally OLED or mini-LED displays.

For fast-paced shooters, this monitor absolutely delivers. The 170Hz refresh rate means you’re seeing 70 more frames per second than a standard 100Hz display, and that difference is noticeable. Panning the camera feels buttery smooth, and tracking moving targets is easier because you’re getting more visual information per second.

The Fast IPS panel keeps up beautifully. I’m seeing minimal ghosting even in high-contrast scenes (white text on black backgrounds, the classic torture test). The overdrive on Fast mode eliminates most trailing without introducing the inverse ghosting that ruins cheaper monitors.

Where this monitor struggles slightly is in atmospheric, dark games. The limited contrast ratio means black levels aren’t truly black, so games like Resident Evil 4 Remake or Alan Wake 2 don’t have that inky darkness that adds to the tension. You can still play them perfectly fine, but a VA panel would deliver better immersion in those titles.

For console gaming, you’re limited by the HDMI 2.0 ports. The PS5 and Xbox Series X can output 1440p at 120Hz, which works great, but you’re not getting the full 170Hz unless you’re using DisplayPort from a PC. That’s fine for most console gamers, but worth knowing.

The good news? There’s a 100×100 VESA mount on the back, so you can ditch the included stand entirely and use a monitor arm. That’s what I’d recommend if you’ve got the option. A decent monitor arm costs £30-40 and transforms the ergonomics completely.

The bezels are thin (around 3mm on three sides), which looks modern and works well for multi-monitor setups. The bottom bezel is thicker (about 15mm including the KOORUI branding), but that’s standard.

There’s no USB-C, which isn’t surprising at this price point but does mean you can’t use this as a one-cable docking solution for a laptop. There’s also no USB hub, so you can’t plug peripherals into the monitor. Again, not unexpected, but worth noting.

The lack of built-in speakers is fine by me. Monitor speakers are universally rubbish anyway, and you’re better off using proper desktop speakers or headphones. The 3.5mm audio jack is there if you want to extract audio from the DisplayPort or HDMI signal.

If you’re primarily playing competitive shooters, the KOORUI and Gigabyte both make more sense than the AOC because of the faster IPS response times. If you’re playing atmospheric single-player games in dark rooms, the AOC’s VA panel delivers better contrast and more immersive blacks, despite the slower pixel response.

The Gigabyte M27Q is probably the KOORUI’s closest competitor. It offers DisplayHDR 400 certification (which is still entry-level HDR, but better than the KOORUI’s implementation), a KVM switch for sharing peripherals between two PCs, and slightly better factory calibration. But it costs £50-80 more depending on sales, which is a significant jump.

For pure gaming performance at this price point, the KOORUI delivers exceptional value. You’re getting 90% of the Gigabyte’s gaming performance for significantly less money. The trade-offs are in build quality and extra features, not in the core panel performance.

Here’s my take on the value: KOORUI has built exactly the monitor that budget-conscious competitive gamers need. They’ve put the money where it matters (the Fast IPS panel, the 170Hz refresh rate, the response time) and cut costs on things that don’t affect gaming performance (the stand, HDR, USB hub).

If you’re coming from a 60Hz or 100Hz monitor, the jump to 170Hz is transformative. And if you’re coming from an older IPS panel, the improved response times will eliminate the ghosting you’ve been tolerating.

What you’re not getting is premium build quality or proper HDR. But honestly? At this price point, those features are either poorly implemented checkbox additions (HDR) or easily solved with third-party accessories (a monitor arm for £30).

If you’re a competitive gamer who prioritises performance over aesthetics, this is an easy recommendation. The money has gone into the right places: the panel, the refresh rate, the response time. The bits that feel cheap (the stand, the plastic construction) don’t affect your gaming experience.

The HDR is rubbish, but that’s true of almost every monitor at this price point. Real HDR requires DisplayHDR 600 certification at minimum, and those monitors cost significantly more. Just disable HDR in your settings and enjoy the excellent SDR image quality instead.