ASUS ROG Strix OLED XG27ACDNG monitor review: the best in the game
Table of Contents
The ASUS ROG Strix OLED XG27ACDNG is the latest in the line of QD-OLED gaming monitors from the ROG sub-brand of ASUS (with many of them having very similar names), which comes with a very impressive 360Hz maximum refresh rate, 1440p resolution, and all the benefits of an OLED panel.
Released in Q1 2025, this display represents the optimum gaming display released by AMD in this size and with this panel type, coming with all the bells and whistles you'd expect, but at a price which is surprisingly reasonable.
Let's see how the XG27ACDNG held up in our testing and see whether it earned a prized place in our best gaming monitor and best OLED monitor guides.
- Refresh rate: 360Hz
- Screen Size: 26.5″
- Resolution : 2560 x 1440
- Panel type: QD-OLED
- I/O ports: 1x DisplayPort 1.4, 2x HDMI 2.1, 1x USB-C (90W power delivery), 3x USB-A 3.2, 1x USB-B 3.2 (upstream), 1x 3.5mm headphone jack
The ASUS ROG Strix OLED XG27ACDNG has virtually everything you could want in a gaming monitor, with all the extras like HDMI 2.1 and FreeSync Premium Pro, and a 360Hz maximum refresh rate, as well as the terrific response time you'd expect from an OLED panel. There's also a raft of features that make it good for general productivity and even some color-accurate work. As ever with an OLED display, the peak brightness is unfortunately limited, but besides this, there's not really anything to complain about.
- 360Hz refresh rate
- OLED panel has fantastic contrast ratio
- Excellent response time & motion clarity
- 100% sRGB coverage & high color accuracy (with some manual calibration)
- FreeSync Premium Pro
- HDMI 2.1
- 90W USB-C Power Delivery & KVM switch
- An excellent array of ports
- Sturdy stand with great adjustability
- Reasonably priced for the specs
- Peak SDR brightness low as with other OLEDs
- 100% DCI-P3 coverage achievable but at lower accuracy
Pricing & availability
The ASUS ROG Strix OLED XG27ACDNG was released with an MSRP of $759 in the US in Q1 2025, though at the time of writing you may struggle to find it for sale on Amazon. You can currently pick it up from Newegg at the market price, or buy it open-box for 25% less, which is an absolute bargain in our opinion.
Be aware, this monitor is easily confused with the XG27ACDMG, which is another 27-inch OLED released the year before, but with a WOLED panel, a 240Hz refresh rate, and worse connectivity (lacking HDMI 2.1, a KVM switch, and USB-C), but with better black replication (being less purple-looking), slightly better HDR performance, and a cheaper price. This older monitor is what often comes up when you search for the ‘N' variant we're reviewing here, so make sure you buy the right one!
Design & specifications
The screen is semi-glossy, and has good reflection handling compared to the majority of full glossy screens, although you will still experience glare from some strong light sources. Still – it's a good middle ground in our view between a grainier matte screen and a full glossy panel. Bezels on the top and sides are nice and thin, with the bottom being thicker as is standard. Behind the lip which juts out at the bottom of the screen there’s a joystick and two controls which navigate the OSD (on-screen display).
In terms of aesthetics the front side has a pretty standard, utilitarian grey look, with the reverse of the monitor having more of an interesting gamer/Sci-Fi looking design, the ROG logo that lights up with RGB. Many OLED monitors are very thin with a smaller, thicker central area on the reverse that contains the ports, though on the XG27ACDNG this section is pretty big, perhaps to account for the custom onboard heatsink and in-built power adapter. With most monitors the power cable comes with a power adapter brick, however with this one all that's included is a kettle plug that you stick straight into the mains. If you're in the UK like us, you may need to employ a region adapter to convert the two-prong plug (or just replace it with another kettle plug).
The stand feels sturdy, well-built, and has great adjustability overall, with 0-120mm height adjustment, a swivel of ±45° swivel, ±90° pivot, and -5° to +20° tilt. As with many ASUS ROG Strix displays, you get a phone holder slot in the front of the base. You also get a 1/4″ mounting socket thread on the top of the stand for attaching any camera or mic you may wish to put up there, which is nice. If you want you can also remove the stand and utilise a 100x100mm VESA mount.
The port coverage on this monitor is terrific, particularly for one that's only 27-inches, with two HDMI 2.1 ports for console gamers, a DisplayPort 1.4 socket, three USB-A 3.2 ports, one USB-B, and a USB-C port with 90W power delivery, plus a 3.5mm headphone jack.
OSD, features, settings & warranty
The ASUS ROG OSD is the same as on others we've tested, and it's one of the nicer ones to navigate in general – being fairly nicely laid out and with an intuitive button system.
There are a whole host of visual presets to choose from, some of which we've tested below. Besides this you get the full range of ASUS OLED Care+ settings to avoid burn-in including Screen Move, Pixel Cleaning, Screen Saver, Auto Logo Brightness, etc. The 3 year warranty also includes coverage for OLED burn-in, so that should offer some comfort if you're thinking of picking one up.
As with most OLED monitors, Automatic Brightness Limiter (ABL) cannot be disabled, but there is a Uniform Brightness setting (under ‘Image') which can be enabled that limits this for fullscreen images at the expense of some peak brightness. If you're watching media or playing a game with dark scenes, particularly if HDR mode is enabled, we recommend turning it off to allow for those higher bright points.
The monitor comes with FreeSync Premium Pro which is great for reducing screen tearing, and it's also G-Sync compatible.
Screen testing & performance
Color gamut
As you can see in the images above the XG27ACDNG achieved 99.9% sRGB coverage plus 99.6% DCI-P3 (effectively 100% for all practical purposes in both cases) and 94.1% Adobe RGB coverage. These results were achieved when using the ‘Wide gamut' color space present – if you switch it to sRGB then you can expect for this to be narrower on the DCI-P3 and Adobe RGB results.
Color accuracy, contrast, gamma & brightness
In the below table are the results we recorded for the various presets we tested that are available within the monitor's settings menu. Our test covers white point, black point, contrast ratio, average deltaE*00 (a measure of color accuracy), gamma, and brightness. In the top row of the table, we've listed what is considered the ideal value for each of these data points, although this is primarily from a technical standpoint: the preset you actually prefer ultimately depends on your subjective preference and what you happen to be viewing on the monitor.
| Preset | White | Black | Contrast | Average DeltaE*00 | Max DeltaE*00 | Gamma | Brightness |
|---|---|---|---|---|---|---|---|
| IDEAL | 6500K | 0cd/m² | infinity:1 | 0 | 2.2 | ||
| Racing | 6578K | 0 cd/m² | infinity:1 | 3.09 | 7.07 | 2.16 | 128.00cd/m2 |
| Cinema | 7536K | 0 cd/m² | infinity:1 | 5.11 | 10.04 | 2.46 | 194.90cd/m2 |
| FPS | 6622K | 0 cd/m² | infinity:1 | 6.47 | 22.31 | 1.94 | 241.68cd/m2 |
| sRGB | 6649K | 0 cd/m² | infinity:1 | 6.56 | 22.46 | 1.93 | 240.96cd/m2 |
| User Mode (sRGB gamut, R:100, G:94: B:97, Brightness 51) | 6429K | 0 cd/m² | infinity:1 | 1.22 | 3.51 | 2.18 | 120.00cd/m2 |
Most of the presets were sub-par from a technical standpoint, with the exception of ‘Racing' which was a reasonable result. Certainly good enough for gaming. Contrast and black point were exceptional as you'd expect from an OLED display, though the gamma results were often a bit wide of the mark. ‘Cinema' mode was particularly poor in terms of gamma and white point, but this is an intentionally stylised preset, so it's to be expected.
For color accurate work you'll want to use the ‘User Mode' preset, make sure the sRGB color gamut is selected, and manually change the color temperature to the following settings: Red:100, Green:94: Blue:97, Brightness: 51. This will give you the very impressive average deltaE*00 score of 1.22 listed in the table, which is great for color-accurate work in this space.
The max SDR peak brightness we recorded was around 237-243nits, deepening on the preset, with the lowest being around 13nits. This peak brightness isn't great by general monitor standards, but is pretty much what you'd expect on most OLED panels. The brightness setting which most closely equates to 120cd/m² (the approximate value for natural light) was 48%.
HDR brightness across 2% of the screen was around 990 nits (slightly worse than the 1,000 nits claimed by ASUS for 3% of the screen, but still good) and across 10% of the screen we recorded 452 nits, which is reasonable although not the best we've seen for HDR replication in OLED displays.
Panel uniformity
Panel uniformity represents how even the luminance and color replication is across the whole screen. In testing for this, the monitor is divided into a 5×5 grid, with the central square acting as the reference point from which every other square is tested for variance.
A recorded variance below 1.00 shows up as green, which is the ideal result, and signifies a variance that is imperceptible to the naked eye. Yellow represents a greater degree of variation between 1.00 – 3.00, though at the lower end of this range this is still unlikely to be discernible to the untrained eye, and doesn't necessarily preclude the display from color accurate work. Greater variance is more of a problem, and shows up as red.
If we look at the table above, we can see that the XG27ACDNG achieved green results in every segment, meaning this is the ideal display for reliable color-accurate work. The panel lottery does apply to these results to a degree however: there's no guarantee that the particular monitor you buy will have exactly the same results, but it's normally a good indication that it will.
Viewing angles
As with all OLED panels, this ASUS display has excellent viewing angles, with almost no detectable color shift to the naked eye when you view the screen from the sides, all the way up to 180°.
Gaming performance
As part of our testing process, we run our usual suite of games (Cyberpunk 2077, Assassin's Creed Valhalla, Doom Eternal, and CS2) on the monitor to see how it fares from a subjective user perspective. The ROG Strix OLED XG27ACDNG was very impressive in all these titles.
Color vibrancy was nice and pronounced on the semi-glossy panel, with deep, rich blacks in darker scenes. In competitive titles the 360Hz refresh rate, combined with the extremely good response times of the OLED panel, made for a pretty sublime experience. Motion clarity remained sharp at full refresh rate, with minimal ghosting noticeable – both in real gaming situations and in the Alien UFO motion test. FreeSync Premium Pro did an excellent job of reducing screen tearing, and we didn't experience any in our time with the display.
General performance & productivity
ASUS ROG Strix OLED XG27ACDNG is designed to be a gaming monitor first and foremost, but the KVM switch, USB-C 90W charging (which could be used to power a phone, tablet, or laptop), plus numerous other USB ports make it pretty useful for productivity purposes as well.
The text legibility is respectable for an OLED, with minimal fringing (though it is still there). It still won’t match the clarity you can get with an IPS panel: we recommend turning on Windows ClearType, which should help improve things further in this department.
Given the screen is only semi-glossy, it doesn't suffer from glare as much as some other full glossy screens do, but it is still noticeable, particularly given the brightness limitations on the display – as with nearly all OLEDs. It might not be the best pick for a brightly lit room for this reason.
Professional color-accurate work within the sRGB space is definitely possible, and you could even work within the DCI-P3 gamut, though to a lower degree of accuracy.
ASUS ROG Strix OLED XG27ACDNG monitor
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