The monitor itself must also support ‘VESA Adaptive-Sync’ for FreeSync to be usable. Out of the box the C27HG70 produced a very bright and vibrant image, with respectable white point balance (aside from a minor green push). This is technically more energy efficient than turning the monitor ‘off’ using the power button of the monitor, as that still maintains a standby state with the monitor and provides a trickle of power. When focusing on racing we weren’t distracted by any of this trailing, but it’s subjective and again some users would find it bothersome.We also tested our Blu-ray film titles, which are limited to ~24fps and noticed no obvious weaknesses related to the pixel responses. 10-bit colour is supported, achieved using 8-bit + FRC dithering. It certainly wasn’t a ‘full fat’ experience, as the limited number of dimming zones and good but not extreme colour gamut restricted the contrast and colour reproduction, respectively. These weaknesses would not be enough to distract or bother all users, it must be remembered. The contrast gradients were very good with distinct brightness steps in most cases. Things looked undeniably vivid, losing a bit of saturation towards the edges and bottom of the screen but nothing too severe. There was some ‘smeary’ trailing, some ‘break-up’ trailing and some overshoot in places. When consuming most content, which is designed with the sRGB colour space in mind, the native gamut of the monitor gives a bit of oversaturation. When it came to gaming, the curve brought with it a slight extra feeling of depth. When consuming most content, which is designed with the sRGB colour space in mind, the native gamut of the monitor gives a bit of oversaturation. However; we noticed some quite obnoxious overshoot as the frame rate dropped into the double digits, particularly below about 80fps. On the colour side the ultimate goal is for HDR monitors to offer a huge colour gamut (Rec. These weaknesses existed regardless of the refresh rate, although as refresh rate was reduced (as low as 100Hz), the distance between the object and the fragmented trails increased. You could see a more extended ‘smeary’ trailing in these instances. When it comes to frame rates it’s always a case of ‘the higher the better’, regardless of FreeSync. Interpolation and upscalingNot all users will want to or be able to use the native 2560 x 1440 (WQHD) resolution all the time. briefly pop up on the screen. Bottom in this case refers to the photo, on the monitor itself it means the port closest to the front of the screen. Darker greys represent lower luminance and therefore greater deviation from the central point than lighter greys. That issue generally makes this sort of model less suitable than IPS-type panels for colour critical work.The C27HG70’s HDR capabilities helped put the colour gamut, which falls just short of DCI-P3, to good use. This wasn’t included in the reference images simply as we didn’t want to cram too much in there. This solution seemed to be integrated in a way that was subtle enough to add something to the experience without the jarring side-effects. The lack of ‘IPS glow’ was a nice addition, although it was replaced by ‘VA glow’ which was a bit higher in this case than on some VA models. Its combination of panel type, resolution, size, refresh rate plus support for HDR (any compatible GPU) and FreeSync (any compatible AMD GPU) are sure to please many users. This was not as pronounced as we’ve seen on some VA models where might appear almost like smoke billowing off the object, but it is something some users would notice and be bothered by. This is definitely a good gaming monitor. The moon appeared very bright and in some ways akin to staring at the real moon, almost retina-piercing if you’re sitting staring at it in a darkened room. ) in, Issue #1 - 144hz refresh rate was missing in windows (Win10 x64) if FreeSync was enabled for the monitor. It’s a good indication that the technology is doing its thing. With ‘Ultimate Engine’ selected, AMD LFC (Low Framerate Compensation) is supported by this model. Unlike other sites, we thoroughly test every product we review. The Samsung CRG9 is a massive monitor with an equally massive price tag. Even better, it would use a per-pixel light source (OLED technology, for example). The blocks took on a sort of ‘oil-slick’ look with an almost shiny quality as you move your head; this is again normal for a VA panel and down to shifts in perceived gamma.Performance in the white saturation test was excellent. It is also a requirement to display a huge variety of shades in between, from weakly saturated to heavily saturated shades. The near-term target for HDR-capable displays such as this is to offer 90% DCI-P3 coverage, so this display exceeds that target. But which appeared to separate out from the object as a slightly colourful trail, a bit like wetting fountain pen ink on paper. Others would find the flickering, lack of FreeSync, lack of HDR, locked brightness, overshoot and fact you need to keep the frame rate matching the refresh rate a bit restrictive. Others would find the flickering, lack of FreeSync, lack of HDR, locked brightness, overshoot and fact you need to keep the frame rate matching the refresh rate a bit restrictive. The UFOs move across the screen from left to right at a frame rate matching the refresh rate of the display. The old DDR4 RAM I used for my Threadripper is clocked at 2133, and I'd like to get a new kit in the 3200+ range. There is a degree of trailing behind this, strongest with the dark background, due to slower than optimal pixel response times. They may be running a system, such as a games console, that doesn’t support the resolution. We carried out most of our testing with at least some ambient light from the room itself.What was in some ways more impressive than these situational improvements was the fact that we didn’t actively notice that the backlight was split into zones. 10-bit colour is supported, achieved using 8-bit + FRC dithering. Some of the finer details were less distinct than they ideally would be, due to ‘black crush’. The details on the main object are a somewhat crisper on this reference shot due in part to superior pixel responsiveness. And even with ‘FreeSync 2’ employed here, it seems that trend remained. All checkerboard patterns were distinct from the white background. I tried a new DP cable that I purchased, tried uninstalling/reinstalling monitor drivers, even uninstalled/reinstalled AMD's drivers... all ended up with 120hz being my cap. The interpolation process provides a somewhat softer look to the image compared to a native Full HD display of similar size. There is a bit of overshoot visible for the lightest background, but this is quite faint. The bottom line; a monitor with an appealing feature-set for gaming in particular, delivering a rich and responsive gaming experience in SDR and HDR. There was some ‘smeary’ trailing, some ‘break-up’ trailing and some overshoot in places. This green tint was strongest but still fairly subtle centrally, whilst peripheral sections of the screen gained a slight red tint. Some would also argue that the more uniform viewing distance of different points of the screen and reduced eye movement required when scanning peripheral sections of the screen is advantageous. If you watch higher frame rate content (for example 60fps), some of the weaker pixel transitions do crop up here and there. The greatest deviation from this occurred at ‘quadrant 8’ below centre (154.8 cd/m², which is 8% dimmer). briefly pop up on the screen. White point was quite well balanced out of the box, although there was a minor green tint. AMD’s recent drivers include Radeon Software Crimson, which makes activation of the technology very simple – in fact it should be enabled automatically if a compatible GPU is connected to the monitor and the monitor is in its ‘FreeSync mode’. Things looked undeniably vivid, losing a bit of saturation towards the edges and bottom of the screen but nothing too severe. For AMD GPU users this is automatically handled by the monitor when gaming, by default. Interpolation and upscalingNot all users will want to or be able to use the native 2560 x 1440 (WQHD) resolution all the time. The lack of ‘IPS glow’ was a nice addition, although it was replaced by ‘VA glow’ which was a bit higher in this case than on some VA models. The reference image from the S2417DG actually looks reasonably close to the comparable medium cyan background (middle row) for the C27HG70. The highest white luminance recorded on this table, with ‘Local Dimming’ disabled, was a bright 440 cd/m² whilst the minimum white luminance recorded was a fairly dim 43 cd/m². Because the monitor is displaying up to 2.4 times as much information every second as a 60Hz monitor (60fps), interactions with the game world were more fluid. The OSD (On Screen Display) is controlled primarily by a joystick (‘JOG button’) at the rear of the monitor, towards the bottom right. This shows the colour gamut using our ‘Test Settings’, which uses the full native gamut of the monitor. The fragmented nature of the trailing is due to the strobe backlight operation. Average gamma is raised slightly, to ‘2.3’, giving some shades extra depth and richness. The viewing angle restrictions (perceived gamma and saturation changes at different points of the screen) did mean that subtle variations in some shades, such as skin tones, were not as distinct as they ideally would be. Interlace pattern artifactsOn some monitors faint interlace patterns can be seen during certain transitions, particularly noticeable where light shades (muzzle flashes, explosions etc.) Brighter elements stood out nicely, such as the moon in the sky and the lights of other vehicles. There was also some overshoot here and there, with some semi-transparent (‘snail-slime’) trails; these were again faint, we did not observe any obvious bright or dirty-looking dark overshoot trailing.As is always the case with VA panels, to varying extents, there were some notable weaknesses in pixel responsiveness. Retaining vibrant shades, where appropriate, but keeping more muted shades from appearing with such strong saturation. The monitor lists ‘FreeSync’ at the bottom of the ‘Information’ section of the OSD if it’s connected up to a compatible GPU and the option is enabled in the OSD. Shades were as consistent as we’ve seen from a VA model of this size, though, and retained sufficient saturation all across the screen to appear far from washed out. We’ve also noted that Windows 10 users with the ‘Creator’s update’ need to be wary of a Windows feature called ‘HDR and advanced colour’. Solution: Only use the Monitor Software/firmware that matches your monitor. At 100Hz using the ‘Standard’ response time setting, the level of perceived blur due to eye movement is reduced compared to 60Hz. Overall we’d say it’s on par with the likes of the AOC AG322QCX and ASUS XG32VQ for some transitions, a bit slower for some and a bit faster for others. This is a common phenomenon associated with perceived gamma on VA panels such as the ones used here, whereby very dark (near black) shades appear darker than intended and essentially meld together into a dark mass. We’ve also previously highlighted how software support for HDR is quite variable on the PC. Not really bright and eye-catching, but still there. This was particularly noticeable when using the mouse, which aided precision and what we like to call the ‘connected feel’ when gaming. The first 3 or 4 blocks blended into the background quite readily, from a normal viewing position. This title, again, had a good mixture of pixel transitions. Nonetheless, these TestUFO shots only analyse a select range of pixel transitions – we make a much broader assessment below. The shade variety was still maintained very nicely, though, which is something that doesn’t happen if you increase saturation levels using software (Nvidia ‘Digital Vibrance’ or a saturation slider, for example). So if the game was running at 32Hz, for example, the monitor would run at 64Hz to keep tearing and stuttering in check. That’s got nothing to do with the monitor itself – there is a little bit of softening to the image compared to viewing such content on a native Full HD monitor, but it’s not extreme and shouldn’t bother most users. The UFOs move across the screen from left to right at a frame rate matching the refresh rate of the display. Soldiers, objects and the game environment all retains superior clarity and detail levels even during rapid movements on the game. Contrast in games and moviesOn Battlefield 1 (BF1) the contrast performance was very good overall. Both of the articles linked to explore the principles behind variable refresh rate technologies and the benefits that they bring to the experience, so we won’t be repeating everything here. With our Radeon R9 290, we had to use fairly conservative graphics settings to ensure triple digit frame rates. It crushes things together and is limited in its saturation potential anyway– on this monitor, shades retain good ‘spacing’ on the gamut, can be potentially more saturated and aren’t crushed together like that.Finally, we tested the Blu-ray of Futurama: Into the Wild Green Yonder. There was also some ‘VA glow’ lower down the screen, which caused dark shades including black to appear lighter than the rest of the screen. The images below tend to exaggerate the curve, but are included for illustrative purposes. The overall balance to the image with respect to white point and gamma handling is good – the apparent shade variety is pleasing. It might make everything look highly flooded on the desktop and you’ll think the monitor is malfunctioning. It can’t compensate for other interruptions to smooth game play, for example network latency or insufficient system memory. With our Radeon R9 290, we had to use fairly conservative graphics settings to ensure triple digit frame rates. In terms of overall clarity, we prefer the tighter pixel density of this model (108.79 PPI – Pixels Per Inch) over the 31.5” variant (93.24 PPI). One significant drawback, which applies more to graphically demanding titles such as this (depending on settings and system), is that the frame rate really needs to match the refresh rate precisely for the mode to work correctly. The monitor itself must also support ‘VESA Adaptive-Sync’ for FreeSync to be usable. Simply turn this feature ‘Off’ if it’s enabled and you notice the desktop looking odd – the monitor will whack itself into HDR mode for fullscreen applications that support an HDR signal regardless of what this feature is set to. This causes the backlight to strobe on and off at a frequency matching the refresh rate of the monitor, reducing eye movement and hence reducing perceived blur via the mechanisms explained in this article. When focusing on racing we weren’t distracted by any of this trailing, but it’s subjective and again some users would find it bothersome.We also tested our Blu-ray film titles, which are limited to ~24fps and noticed no obvious weaknesses related to the pixel responses. A highly effective Low Blue Light (LBL) setting, providing a warm look to the image with a significant reduction in the blue colour channel. So how does this work out in practice? We wouldn’t generally recommend keeping the brightness that high if you’re gaming in a dark room, unless you really want that kind of dazzling experience. The flickering (unavoidable – it’s how it works), greyed out brightness setting and pixel responsiveness imperfections that were retained won’t appeal to everyone.Anybody who is used to reading our reviews will know that all monitors have distinct strengths and weaknesses. As such subtle details on the rocks appeared more clearly than with HDR disabled, where everything is just flooded by an excessively bright backlight. The lack of ‘IPS glow’ was a nice addition, although it was replaced by ‘VA glow’ which was a bit higher in this case than on some VA models. Some of these shades were somewhat more saturated than they should be, but a strong variety was maintained. In addition to this, some of the pixel transitions were slow enough to provide a sort of ‘smear’ similar to what is observed without the strobe backlight setting active. This suggests that, overall, the AOC has slightly better tuned pixel overdrive under using its optimal ‘Medium’ setting. The environments appeared quite natural and believable overall. The contrast gradients were very good with distinct brightness steps in most cases. But overall shades retained a decent degree of individuality and the overall variety was pleasing. It is also interesting to compare 144Hz pixel response performance to the AOC AG322QCX, which uses a larger variant of the same panel. That isn’t how things played out, as it would require many more dimming zones to simulate effectively – ideally per-pixel lighting. Although we felt these weaknesses were more pronounced when compared to other monitors that use this sort of technology, including the C24FG70. The distinctions between closely matching bright and dim shades was aided by 10-bits per channel precision. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. For the most part the pixel transitions made good use of this refresh rate and were fast enough for an optimal or near-optimal performance. Viewing anglesLagom’s tests for viewing angle tests help explore the idea of colour consistency and viewing angle performance. The benefits of the light matte screen surface (with the image appearing ‘close to the surface’ rather than as if you’re looking through a dirty window) are still very much apparent. The image looked flooded, but this was all intentional; some users would find this more comfortable, although we prefer the alternative ‘Warm2’ setting with stronger contrast. Desert sands appeared with a slight red hue rather than appearing more of a sandy colour and some of the more muted greens of vegetation were a little more eye-catching than they should be. HDR works with this at the software level to make use of this level of precision, whilst the monitor supports such a bit depth as well. We’ve also noted that Windows 10 users with the ‘Creator’s update’ need to be wary of a Windows feature called ‘HDR and advanced colour’. This was far from being the worst VA model we’ve seen in any of those respects, even amongst high refresh rate models. Not everybody would be bothered by it and it isn’t as intense as we’ve seen on some models, but it is something that simply wasn’t there at significantly higher frame rates. For the most part the pixel transitions made good use of this refresh rate and were fast enough for an optimal or near-optimal performance. On Battlefield 1, at suitably high frame rates (the higher the better, up to 144fps), it was clear that this was a 144Hz monitor we were using. At thinnest point it’s ~15mm (0.59 inches), but it uses a dual-hinged flexible arm neck design. Fees for brokerage and duty included in price.

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