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The most widely used panels are those with 6, 8, and 10 bits for each of the RGB components of the pixel. They provide 18-, 24-, and 30-bit color, respectively. The 27GN950 comes with a factory calibration report as shown above with our sample. This confirms some fairly relaxed calibration measures for the screen that have been achieved as it comes out of the factory. It has a gamma somewhere between 2.1 and 2.3, a white point between 6000 – 7000k and a dE of <5. These are in our opinion a bit too relaxed, and we would have liked to have seen a bit more precision in the targets being met, along with perhaps an actual figure achieved instead of just a generic “pass”. We went on to measure the screen anyway. 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.
Work more efficiently with LG's Office computer monitors that are ultra-clear and wide, offering true color contrast and detail at any angle. The light AG coating of the panel is welcome, and much better than the grainy and dirty appearance of older IPS AG coatings. Thewide viewing angles provided by this panel technology on both horizontal and vertical planes, helps minimize on-screen colour shift when viewed from different angles.The default setup of the screen was reasonable as well, offering an accurate gamma curve and decent contrast ratio for an IPS panel. The white point is a bit too cool but not by much. You can correct this easily enough through the OSD menu. There is support for both the native DCI-P3 colour space (default mode) and an emulated sRGB colour space if you need it after the latest firmware is applied which fixed the sRGB emulation. Those wanting to work with wide gamut content for multimedia and HDR can achieve good coverage of the DCI-P3 colour space as well. The availability of hardware calibration was very welcome, allowing you to calibrate and control your screen with high levels of accuracy, storing the results on the screen itself to ensure this is retained for all uses, not just those ICC-profile aware applications and colour managed workflows. The operating temperature shows the safe temperature range (from minimum to maximum), within which the display will function flawlessly. Outside this range it might operate improperly and/or fail entirely. Thankfully there is a way to have even better control and accuracy including with an emulated sRGB colour space, but you will need to be able to hardware calibrate the screen. The 27GN950 is one of those screens that looks fine with HDR enabled in Windows actually, at least in our testing, with other screens often looking terrible. You probably only want to enable it for HDR content though as the 100 brightness level is too bright for normal use, and turning it down to make it more comfortable for day to day use then spoils some of the point of having HDR enabled in the first place (the higher peak brightness).
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We reviewed the 27 inch LG 27GN950-B, which is the only size available forthis model. There are other models in LG's UltraGear lineup, some of which are listed below. The comparisons made in this section try to give you a better view of how each screen performs, particularly out of the box which is what is going to matter to most consumers. We have divided the table up by panel technology as well to make it easier to compare similar models. When comparing the default factory settings for each monitor it is important to take into account several measurement areas – gamma, white point and colour accuracy. There’s no point having a low dE colour accuracy figure if the gamma curve is way off for instance. A good factory calibration requires all 3 to be well set up. We have deliberately not included luminance in this comparison since this is normally far too high by default on every screen. However, that is very easily controlled through the brightness setting (on most screens) and should not impact the other areas being measured anyway. It is easy enough to obtain a suitable luminance for your working conditions and individual preferences, but a reliable factory setup in gamma, white point and colour accuracy is important and some (gamma especially) are not as easy to change accurately without a calibration tool. 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.
Keep in mind that not all Operating Systems and applications handle scaling the same. More recent versions of Windows (8.1 and 10) tend to handle it all better, and recent versions of Mac OS are pretty solid as well. Some applications and games don’t handle scaling correctly and so you can end up with some things with very minute text and fonts and some things which don’t scale completely in every place. Keep this in mind if you’re selecting any super high resolution display as it could be an important factor. You need to ensure you have the necessary operating system and applications to handle scaling effectively for your needs. It does make life a bit more complicated than if you just ran at a native resolution, which is where the more common 2560 x 1440 res fits in to the 27″ display space. Information about whether the stand can be dismounted. Usually, this is required for wall mounting. The default 16:9 aspect ratio is likely to serve most needs here anyway but the provided ‘original’ mode should then cover anything else nicely Monitors: Ultra High Definition (UHD) displays with four times the resolution of Full HD, ideal for detailed visuals.Luminance uniformity of the screen was very good on our sample, with all of the screen within a 10% deviance of the centrally calibrated area which was pleasing. The bottom area was slightly brighter than the top, and it dipped a little in the upper corners but not by anything major or noticeable. So from an older non-DSC card keep in mind that the maximum refresh rate you can achieve is 95Hz, even if you were willing to drop colour depth or chroma to lower levels. This also applies at non-native resolutions like 1440p and 1080p, 95Hz appears to be the maximum allowed, at least with native screen timings. is a NVIDIA-tested and officially validated G-SYNC® Compatible monitor, eliminating screen tearing and minimising stutter for a smoother, faster gaming experience. Default gamma was recorded at a 2.2 average with a minor 2% deviance from the target of 2.2 which was very good, showing a little more deviance in the lighter grey shades. The default colour temperature was a little too cool at 6858k (6% out from our target), although not too bad.
We use an ETC M526 oscilloscopefor these measurements along with a custom photosensor device. Have a read of our response time measurement articlefor a full explanation of the testing methodology and reported data. Enhance your gaming experience with eye-catching design, improved V-wing stand and the narrow bezel. The base can be adjusted to change the tilt, height and pivot of the monitor to help you play game more comfortable. LG medical monitors come equipped with an array of functions to assist sharp and well managed medical treatment. The accurate diagnosis gets achieved with the top-notch image display that produces precise tissue level details to encourage the medical anatomy. The total lag measured was a very impressive 2.75ms total. The pixel response times account for around 2.5ms, and so we can say that there appears to be around 0.25ms of signal processing lag on this screen which is super low. A solid result from this display and making it suitable for fast and competitive gaming.
Response times are very good on this panel. For 60Hz content and external devices the ‘Fast’ mode showed low levels of lag, nothing really obvious in practice. Dropping to the ‘normal’ mode is also viable and removes all the overshoot problems, without major impact to response times Contrast ratio (static)– we aim for as high as possible. Any dynamic contrast ratio controls are turned off here if present The percentage of the approximate area, taken by the active part of the screen, to the total front area. Dimensions, weight and color Information about the dimensions and the weight of the specific model with and without stand as well as the colors, in which it is offered to the market. Width 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.
The 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. We should note here that when we first tested this feature we saw an issue, flagged to us by some readers, where the hardware calibration would not be properly saved to the screen after a reboot of display power off. We spoke to LG about this who confirmed that they were issuing a new firmwarefor the screen to fix this problem. We had chance to test that firmware early and it did indeed fix the issue. Hardware calibrations are now properly stored and remembered. Setup ComparisonsPreset Modes –There are quite a few gamer-oriented modes available in the ‘picture mode’ preset mode menu including FPS and RTS modes. There are also two customisable user modes called Gamer1 and Gamer2. So it should be easy to set the screen up to your liking for different uses if you want. LG 5K monitors are a great option for gamers, photographers & graphic designers. Our 4K & 5K gaming monitors have an excellent resolution & high refresh rate to enhance the user experience. If someone comes across a different type of panel or if their 27GN950-B doesn't correspond to our review, let us know and we'll update the review. Note that some tests, such as the gray uniformity, may vary between individual units. Model The operating humidity shows the acceptable level of humidity, in which the display will function flawlessly. It sets a lower and an upper humidity level for safe operation and is measured in percentage. We later tested the Asus ROG Strix XG27UQwhich was one of the first to provide 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 whitepaperon DSC if you want to know a bit more about it. Like the XG27UQ, the LG 27GN950 uses DSC to help support the high resolution and refresh rate here.
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