There are some blue light filter settings available in the OSD menu with settings from 1 – 4. Each one gets slightly warmer than the last, with the maximum setting of 4 delivering a warmer white point of around 5004k and reducing the blue spectral peak a bit as shown above.

The ratio between the horizontal and the vertical side of the display. Some of the standard and widely used aspect ratios are 4:3, 5:4, 16:9 and 16:10. Updated to Test Bench 1.2, resulting in changes to the results and scores with the Response Time and Input Lag. Added tests for Console Compatibility and macOS compatibility and made minor changes to other tests, which you can see in our Changelog. Strong contrast ratio for an IPS panel, helping provide good clarity in shadow detail and darker content. Buying an alternative VA technology panel would provide you a higher contrast ratio if you watch a lot of dark content and miss some shadow detailThe static contrast shows the ratio between the brightest and the darkest color, which the display can reproduce simultaneously, for example, within one and the same frame/scene. The screen uses overdrive technology to boost pixel transitions across grey to grey changes as with nearly all modern displays. The part being used is an AU Optronics M270QAN02.3 AHVA (IPS-type) technology panel.Have a read about response time in our specs section if you need additional information about this measurement. Some bleed on our sample from the lower corners, but will vary from sample to sample and was not too bad Information of the number of pixels in a unit of length. With the decrease of the display size and the increase of its resolution, the pixel density increases. Often even a higher peak luminance can be achieved under certain conditions. For example, when a smaller area/APL of the display is used for showing a bright object, when a bright object is displayed for a short time, etc.

Here, with the resolution being so much higher it is about providing a sharper and crisper image, while still operating with a similar desktop area and similar font size to the 1440p models. It is providing a higher pixel density (Pixels Per Inch, PPI) to improve the degree of definition to the image. You need to us operating system scaling to handle this properly. If you try and run the screen without any scaling at 3840 x 2160 the 0.156mm pixel pitch makes everything far too small and tiny. In our view you need a screen of about 39 – 40″ in size (like the Philips BDM4065UC for example) to use an Ultra HD or 4K resolution effectively without OS scaling. On this 27″ model, if you increase the scaling to 150%, you actually end up with the same workspace area as 2560 x 1440, but at a much higher PPI pixel density – and therefore a sharper image. Have a read of Eizo’s very useful article for some more information on the whole matter. For those wanting a high pixel density for CAD, design, photo work etc, this is a really good option. The image was very sharp and crisp and text was very clear. It is a little debatable whether you will gain much benefit from the higher PPI on a screen this size compared with a 2560 x 1440 standard model, but some may notice picture quality and sharpness improvements. Aspect Ratio Control –the screen offers a limited range of aspect ratio controls from the menu with only full and 4:3 modes supported. The default 16:9 aspect ratio of the screen should be common anyway, and your graphics card can always handle other aspect ratios if needed from a PC. We have plotted the luminance trend on the graph above. The screen behaves as it should in this regard, with a reduction in the luminance output of the screen controlled by the reduction in the OSD brightness setting. There is a steeper adjustment curve for settings of 50 and below as you can see. The SpyderX includes a suite of other tests to assess a monitor’s performance. As you can tell from the report above, the XG27UQ did very well, with the only shortcomings being its white point (6800K vs 6500K) and luminance uniformity where the corners and edges proved to be about 10-12% less bright than the center. This result is reportable but is difficult to notice in normal use, especially while gaming due to the motion on the screen. dE average / maximum– we aim for as low as possible. If DeltaE >3, the color displayed is significantly different from the theoretical one, meaning that the difference will be perceptible to the viewer. If DeltaE <2, LaCie considers the calibration a success; there remains a slight difference, but it is barely undetectable. If DeltaE < 1, the color fidelity is excellent.Styling is distinctly Asus ROG with nothing to distract in the front. A small ROG logo adorns the 21mm wide trim strip across the bottom while the remaining bezel is flush, just 7mm wide when the image is present. The Asus ROG Strix XG27AQ makes a good candidate for multi-screen setups where a thin dividing line is desired. Alignment marks in the GamePlus menu aid in marrying the images together. Moving on to the screen itself, the XG27UQ uses an IPS panel. This display type is coveted by content creators due to its accurate colors, and that’s definitely the case here. Using my Datacolor SpyderX Elite, I was able to verify that the display covers 100%+ of the sRGB color space and 91% of DCI-P3, and also offered decent out-of-the-box calibration. If you’re a hobbyist creator, you can use it confidently without any adjustments, but following SpyderX’s calibration process, I was able to refine it to where color inaccuracies were imperceptible, even outperforming the Acer Predator X35 gaming monitor, which is triple the price. If you don’t have a calibration tool, the sRGB mode also does a good job of closing this gap, at the expense of color range. You can use our settings and try our calibrated ICC profile if you wish, which are available in our ICC profile database. Keep in mind that results will vary from one screen to another and from one computer / graphics card to another. Class 1) Less than 8.33ms – the equivalent to 1 frame lag of a display at 120Hz refresh rate – should be fine for gamers, even at high levels The average contrast ratio of the screen was measured at 1138:1 out of the box which was good for an IPS-type panel. It remained pretty stable across the brightness adjustment range as you can see above. Testing Methodology

The ROG Strix XG27AQ is a product produced over at Asus. It headlines 2.560 × 1.440 pixel of sharpness . Its aspect ratio and superior clarity keeps it reasonable to exhibit it on screens that are grander than 27". Due to the fact that with higher sizes, you need more pixels to sustain a stark picture The advertised screen proportions of 16:9 allows this one to be suited for casual tasks. It is capable of assisting in gaming, internet surfing and productivity apps. All in all, it should keep you headache-free. Quite Average The XG27UQ provides another answer to the problem in the form of DSC (Display Stream Compression). This is a VESA standard that allows compression of the image in a reported “visually lossless” way. This negates the need for colour compression from reduced chroma or any other means, and has been added to the display’s DisplayPort 1.4 connection. VESA have a whitepaper on DSC if you want to know a bit more about it. Image quality is assured by an extended gamut that covers over 91% of DCI-P3 as confirmed by our tests. Accuracy is also assured by an enclosed data sheet, but we found some visible gains in quality with calibration and careful selection of picture modes. HDR10 signals are supported with a peak output of over 400 nits and dynamic contrast which takes the ratio up to over 22,000:1. You can use this feature for SDR signals too and see a similarly broad dynamic range.The dynamic contrast shows the ratio between the brightest and the darkest color, which the display can reproduce over time, for example, in the course of playing a video. We carried out some further response time measurements at 144Hz which is the maximum refresh rate of the screen. We measured an average 6.8ms G2G response time in this mode which was good although not as fast as we might have expected from a modern IPS gaming panel to be honest. We had seen the PG27UQ reach down to 5.3ms G2G at 144Hz with more consistent performance, although that screen does feature a Native hardware G-sync module as we’ve discussed earlier. Some transitions reached down as low as 3.4ms which was great, but the problem was that some other transitions were much slower up to 11.1ms in the worst case. At this max refresh rate the overshoot is at a low level and doesn’t cause any issues in practice which was great news. Refresh Rate Compliance The pixel pitch shows the distance from the centers of two neighboring pixels. In displays, which have a native resolution (the TFT ones, for example), the pixel pitch depends on the resolution and the size of the screen.