We noticed similarly high input lag on the CHG70 with a 60 Hz input, but this was fixed by setting the 'Refresh Rate' setting to 60 Hz this is not the case with the CHG90, at least as of firmware 1014.2. The 'Low Input Lag' setting in the monitor's OSD was greyed out when the input signal was 60 Hz, even when the monitor's 'Refresh Rate' setting was also 60 Hz. Unfortunately, the 60 Hz input lag seems to have a problem it's far higher than the other input lag measurements and was often inconsistent during testing. Also, updating the firmware is somewhat complicated, as we had to continuously disconnect and reconnect the cables, as well as power the monitor on/off to start the update.Įxcellent low input lag, low enough for even the most competitive gamers. Update : We've retested the input lag 60Hz with the latest firmware version 1021.0. Our tests were tear-free for the full FreeSync range, under both the 'Standard' and 'Ultimate' modes. Update : We have tested the CHG90 with NVIDIA's new FreeSync drivers, and there were no issues. Unfortunately our FreeSync test failed when using the 'Standard Engine' so we're unable to confirm these numbers. The 'Standard Engine' has a much narrower FreeSync range: a reported 120 Hz to 144 Hz over DisplayPort and a reported 100 Hz to 120 Hz over HDMI. The FreeSync 'Standard Engine' setting is included for games that have problems with the 'Ultimate Engine'. While the maximum refresh rate is limited to 100 Hz, the feature is also functional with an HDMI input. Using the 'Ultimate Engine' setting of the monitor, the reported range is 48 Hz to 144 Hz over DisplayPort, which is wide enough for Low Framerate Compensation (LFC) to extend the range down below 20 Hz by sending double or triple frames, allowing the feature to remain functional even when the framerate of the game drops significantly. This high refresh rate will produce noticeably smoother motion in many general use cases, and the FreeSync support is very useful for gaming as it reduces stutters and screen tearing. The max refresh rate over DisplayPort is 144 Hz, but over HDMI the limit is 120 Hz. Either option will reduce the length of the trail significantly and greatly sharpen moving objects.Įxcellent high refresh rate, and full support of AMD's FreeSync 2 technology. We recommend the 'Fastest' setting because it has a narrower pulse width than 'Faster', and thus will have clearer motion, but 'Faster' may look a little less flickery to those sensitive to flicker. In contrast, adding flicker that matches the input framerate is actually beneficial to motion (as seen in the photo above), and the monitor's 'Response Time' 'Faster' and 'Fastest' settings do just that. This flicker is similar to that of the 32" CHG70 as reported by TFT Central the 27" CHG70 we reviewed is flicker free. The flicker becomes more bothersome the lower the 'Brightness' setting, because the PWM duty cycle decreases at maximum 'Brightness' the flicker should be almost undetectable. The flicker also makes motion a little less clear as it causes the trail behind moving object to look like noticeable duplications instead of a smooth fade. The flicker frequency is fairly high at 433 Hz, which shouldn't be noticeable to most people but may still be bothersome to those sensitive to flicker. The Samsung CHG90 dims its backlight using only PWM flicker, which is not as good as a flicker free monitor. This is provided for reference only and should not be used, as the calibration values vary per individual unit even for the same model due to manufacturing tolerances. You can download our ICC profile calibration here. A small dip is still visible in the higher IRE (brighter), but this does not cause any issues overall.Īs for the color temperature, we are still a bit on the warm side, as seen on the CIE colors space map, where the white point tends toward the red-yellow, but we are really not far from our 6500K and within our noticeable difference on 400K. Looking at the gamma value and curve, we can see that the curve does track more closely our target curve, and for the gamma value, we are now a bit closer to our 2.2. The 'Gamma' mode was also kept on the 'Mode2'. The calibration was done on the same picture mode that the pre-calibration was done, the 'Custom' picture mode, but the 'Color Tone' was changed for the 'Custom' one since we needed to adjust the RGB balance. Both the white balance and color dE were cut by more than half, and are now hovering just above the 1.0 mark, which is almost perfect for most people, even professional. After calibration, the accuracy of the Samsung CHG90 is excellent.
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