ASUS ROG Strix XG27AQ Review UK (2026) - 170Hz Fast IPS, 1440p Gaming Verdict

A monitor's headline numbers only tell you so much. A 170Hz refresh rate means nothing practical if the panel smears through dark scenes or the overdrive setting introduces inverse ghosting so bad you'd rather cap the frame rate. The ASUS ROG Strix XG27AQ has 316 averaging ★★★★☆ (4.4), and that's a more useful signal than any marketing bullet point.

The verdict: this is a genuinely good 1440p gaming monitor in the mid-range bracket, and it earns that rating honestly. Fast IPS, a real-world-useful 170Hz (overclocked from 144Hz), G-SYNC Compatible certification, and DCI-P3 95% colour coverage make it one of the more complete packages at this price point. It's not flawless, and the HDR story is the usual DisplayHDR 400 caveat that applies to almost everything in this tier. But for competitive gaming at 1440p, it delivers on its promises more than most.

If you're trying to decide whether the ASUS ROG Strix XG27AQ review process leads you to a buy or a skip, the short answer for most 1440p gamers is: buy it. The longer answer follows below.

The panel is Fast IPS, which is ASUS's branding for a higher-speed IPS panel variant. The native refresh rate is 144Hz, but the monitor is overclockable to 170Hz, and that overclock is stable according to the vast majority of owner reports. ASUS rates the response time at 1ms GTG, which is the grey-to-grey figure. The monitor carries G-SYNC Compatible certification, meaning NVIDIA has validated it for VRR use with GeForce cards, and it also supports AMD FreeSync Premium.

Connectivity is 2x HDMI 2.0 and 1x DisplayPort 1.2. The DisplayPort connection is what you'll want for 1440p at 170Hz on a desktop GPU. HDMI 2.0 tops out at 1440p 144Hz, so if you're pushing the full 170Hz overclock, DisplayPort is the cable to use. The monitor also carries VESA DisplayHDR 400 certification, which we'll address properly in the HDR section.

The trade-off with IPS has traditionally been contrast. A typical IPS panel delivers around 1000:1 native contrast ratio, which is noticeably lower than VA panels that can hit 3000:1 or higher. That means blacks on an IPS look more like a very dark grey in a dim room, and IPS glow (a milky brightening in the corners at low brightness) is a real phenomenon. Owner reviews of the XG27AQ do mention IPS glow in a handful of cases, which is entirely normal for the panel type and not a fault with this specific unit. If you're watching a lot of dark cinematic content in a blacked-out room, VA or OLED will give you better perceived depth. For gaming in a normally lit room, IPS is perfectly fine.

Fast IPS specifically refers to a variant of IPS technology engineered for faster pixel transitions. Standard IPS panels can struggle at high refresh rates because the liquid crystals are slow to respond. Fast IPS addresses this by optimising the cell design and overdrive algorithms. The result is that this panel can credibly claim 1ms GTG without the kind of aggressive overdrive overshoot that turns highlights into ugly coronas around moving objects. Published measurements from display-focused outlets have generally confirmed that ASUS's Fast IPS implementation on the XG27AQ sits in a good position: fast enough for competitive play, without the inverse ghosting that ruins some aggressively tuned budget panels.

The panel uses a matte anti-glare coating, which is the sensible choice for a gaming monitor. Glossy panels look punchier in a dark room, but they turn into mirrors the moment any ambient light hits them. The matte coating on the XG27AQ reduces reflections without the heavy grain that some budget anti-glare coatings introduce. Owner reviews are generally positive about screen clarity, with no significant complaints about a sparkle effect or graininess that some cheaper matte coatings produce.

Brightness uniformity across the panel is typically good on IPS, and the XG27AQ follows that pattern. There are occasional owner reports of slight backlight bleed in corners, which again is par for the course with IPS edge-lit panels. ASUS's quality control on this model appears solid based on the 4.4 average rating across 316. A 4.4 on Amazon, where people are often more motivated to leave negative reviews than positive ones, is a genuinely good sign for panel lottery outcomes.

G-SYNC Compatible certification means NVIDIA has put the XG27AQ through its validation process and confirmed it works reliably with GeForce GPUs in VRR mode. This is not the same as a full G-SYNC module (which adds significant cost and locks you to NVIDIA), but in practice the experience is very close. The certification means VRR is enabled by default and has been tested for issues like flickering or frame pacing problems that can appear on uncertified FreeSync panels when used with NVIDIA cards. AMD users get FreeSync Premium, which includes Low Framerate Compensation (LFC) to keep VRR active even when your frame rate dips below the panel's minimum VRR range.

ELMB SYNC is ASUS's implementation of simultaneous backlight strobing and VRR. Normally these two technologies conflict: strobing requires a fixed refresh rate to avoid flicker, while VRR is by definition variable. ASUS's ELMB SYNC allows both to operate together, which reduces motion blur from both pixel persistence and frame tearing simultaneously. It's a genuinely useful feature for competitive players who want every possible edge in fast-moving scenes. Not every monitor in this price range offers combined strobing and VRR, and it's one of the XG27AQ's genuine differentiators. You can read more about variable refresh rate technology on Wikipedia if you want the full technical background.

The overdrive settings on the XG27AQ give you some control. The default mode is typically the best balance between speed and overshoot. Pushing to the maximum overdrive setting does introduce some inverse ghosting (bright halos trailing behind fast-moving objects), so most users find the mid-level setting the practical choice. This is normal behaviour for a Fast IPS panel at this refresh rate. Owner reviews don't flag ghosting as a significant issue, which suggests ASUS has calibrated the default overdrive sensibly.

For competitive gaming, the combination of 170Hz and Fast IPS response puts the XG27AQ in genuinely good territory. You're not going to get the sub-millisecond pixel response of a TN panel, but you're also not going to be staring at washed-out colours and terrible viewing angles. For most players, the XG27AQ's motion handling is fast enough that it stops being the limiting factor. Your reaction time, your GPU's frame rate output, and your internet connection will all matter more than the difference between 0.5ms and 1ms GTG in actual competitive play.

Factory calibration on gaming monitors in this price range is rarely exceptional, and the XG27AQ is no different. Out of the box, colours are generally good but not perfectly accurate. The default colour temperature runs slightly warm on some units based on owner reports, and there's some variation between panels as you'd expect. For gaming and general use, the factory settings are fine. For colour-critical creative work like photo editing or video grading, you'd want to calibrate it properly, but even uncalibrated it's more capable than a standard sRGB-only panel.

The sRGB coverage is, of course, well above 100% given the DCI-P3 95% figure. If you're working in sRGB-native content (which most web and older game content is), the wider gamut can make colours look slightly oversaturated by default. Most colour management-aware applications handle this correctly, but some older games and applications don't. ASUS includes colour mode presets in the OSD including an sRGB mode, which clamps the output to sRGB for more accurate colour rendering in those contexts. It's a practical solution even if it's not as precise as a hardware calibration profile.

This is not a criticism specific to the XG27AQ. It's the honest reality of DisplayHDR 400 as a standard. At this price point, proper HDR with local dimming (which starts appearing in DisplayHDR 600 and above tier monitors) costs significantly more. If you've seen a high-end OLED or a Mini-LED panel with full-array local dimming running HDR content, you'll know what real HDR looks like. The XG27AQ does not deliver that experience, and ASUS doesn't claim it does. The DisplayHDR 400 badge is accurate but it's a checkbox rather than a promise of cinematic HDR.

In practice, enabling HDR on the XG27AQ in Windows and in HDR-enabled games gives you the wider colour gamut benefit, which is real and visible. Bright scenes look punchy. The limitation shows up in dark scenes where you'd want true local dimming to control backlight zones. For gaming in well-lit environments and for content that benefits from wide colour rather than extreme contrast, it's a genuine if modest upgrade over SDR. For serious HDR film watching in a dim room, it falls short of what a dedicated HDR display can do. Most owners in the review pool seem aware of this trade-off and rate it positively anyway, which suggests expectations are well calibrated.

Peak SDR brightness on the XG27AQ is sufficient for comfortable use in a bright room. The DisplayHDR 400 certification requires 400 nits peak, and ASUS rates the panel accordingly. For most indoor gaming environments, you won't be running it at maximum brightness anyway. The practical brightness range covers everything from a dim evening gaming session to a brightly lit office environment without issue.

Glare handling benefits from the matte anti-glare coating mentioned in the display quality section. In a room with windows behind or beside you, the matte surface keeps reflections diffuse rather than producing the mirror-like reflections of a glossy panel. If your gaming setup has serious light management issues (a window directly behind your monitor, for example), the matte coating helps but doesn't eliminate the problem entirely. No flat panel monitor does. The sensible fix is to sort your room lighting rather than buying a different monitor.

The stand footprint is typical for a 27-inch gaming monitor. It's not compact, but it's stable. Owner reviews don't flag wobble or instability as issues, which is a good sign. The stand attaches to a 100x100mm VESA mount pattern, so if you prefer a monitor arm (which gives you even more positioning flexibility and frees up desk space), you can remove the stand and mount it directly. This is standard for monitors at this price point and above.

Build quality is generally well regarded in owner reviews. The ROG Strix aesthetic is present but not overbearing. There's RGB lighting on the back of the monitor, which you can control through ASUS's Aura Sync software if you're into matching your setup's lighting, or simply turn off if you're not. The OSD controls are physical buttons on the underside of the bezel, which is a more reliable interface than touch-sensitive controls that can be fiddly to operate in the dark. A few owner reviews mention the OSD navigation taking some getting used to, which is a common complaint across most gaming monitors regardless of brand.

The DisplayPort 1.2 connection is what you'll use for PC gaming at the full 170Hz overclock. DisplayPort 1.2 has the bandwidth to handle 1440p at 170Hz without compression, so you're not leaving anything on the table. If you're on an NVIDIA GPU and want G-SYNC Compatible VRR at the full refresh rate, DisplayPort is the connection to use. HDMI 2.0 can do VRR with FreeSync-compatible setups, but the maximum refresh rate over HDMI 2.0 at 1440p is capped at 144Hz.

• 2x HDMI 2.0 (1440p up to 144Hz)
• 1x DisplayPort 1.2 (1440p up to 170Hz)

That's a clean, practical port layout for a gaming monitor. If you need USB hub functionality or a USB-C connection, those are not specified for this model, so factor that in if they're important to your setup. For a dedicated gaming monitor connected to a desktop PC or console, the port selection is entirely sufficient and the dual HDMI is a genuine convenience over single-port competitors.

The LG 27GP850-B is arguably the XG27AQ's closest direct competitor. Both use Fast IPS panels, both target 1440p gaming at high refresh rates, and both carry G-SYNC Compatible certification. The LG tops out at 165Hz versus the ASUS's 170Hz, which is a difference nobody will notice in practice. The LG has a slightly better reputation for out-of-box colour accuracy in some published measurements, while the ASUS edges ahead on the ELMB SYNC feature for simultaneous strobing and VRR. Build quality and stand ergonomics are broadly comparable. At similar price points, this is genuinely a coin-flip decision based on which features matter most to you.

The Samsung Odyssey G5 takes a different approach with a VA panel. VA gives you better native contrast (typically 2500:1 to 3000:1 versus IPS's 1000:1), which means deeper blacks in dark game scenes. But VA panels are slower to respond, and the G5's response time performance in published measurements shows more visible smearing in fast motion than Fast IPS alternatives. For competitive gaming where motion clarity matters, Fast IPS like the XG27AQ is the better choice. For slower-paced games, RPGs, or anyone who watches a lot of dark cinematic content, the VA contrast advantage is real.

The HDR story is the expected DisplayHDR 400 caveat: it's real but modest. You get wider colour gamut benefits, not the dramatic contrast of a proper HDR display. That's not a failure of the XG27AQ specifically; it's the reality of the DisplayHDR 400 tier across the board. Anyone expecting OLED-like HDR at this price point is looking at the wrong product category entirely. Within the realistic expectations for a mid-range IPS gaming monitor, the HDR implementation is fine.

Native contrast is the other limitation to be clear about. IPS panels at 1000:1 look great in a normally lit room and adequate in a dim one. If you primarily game in a dark room and play a lot of atmospheric horror or space games where deep blacks matter, a VA panel like the Samsung Odyssey G5 will give you more impactful dark scenes, even if it loses on motion clarity. Know your use case.

For competitive gaming, the XG27AQ is a proper tool. Fast IPS response, 170Hz, ELMB SYNC, and G-SYNC Compatible certification cover every base a competitive player needs. For general gaming and some creative work, the DCI-P3 95% coverage makes it more versatile than a basic sRGB panel. Build quality is solid, the stand is fully adjustable, and the dual HDMI ports add real convenience.

One honest caveat: if you're primarily on console and your games cap at 60fps or 120fps, you don't need 170Hz. A good 144Hz IPS panel at a lower price point serves console gaming perfectly well and costs less. The XG27AQ earns its price for PC gamers who can actually drive the frame rates to use the high refresh rate. If you can't push past 100fps consistently in your games, a cheaper 144Hz monitor is the smarter buy.

Score: 8.5 out of 10. A well-executed Fast IPS gaming monitor that earns its mid-range price through a combination of genuine motion performance, strong colour coverage, and practical features like ELMB SYNC and dual HDMI. The HDR is checkbox-tier, but that's a mid-range market reality, not a specific failing of this monitor. For 1440p PC gaming at high frame rates, it's one of the better options in the bracket.