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Note: This review is part of our ongoing roundup of the best gaming monitors. Go there to learn more about competing models, what to look for in a gaming monitor, and buying recommendations. AOC 24G2U: The specs Display size
In 2021, some AOC 24G2 monitors used a different BOE MV238FHB-NG0 panel. Its measured peak brightness and contrast ratio are closer to the specified 250-nits and 1,000:1, but it also has a slightly better response time speed and overdrive implementation.
The image below is a macro photograph taken on Notepad with ClearType disabled. The letters ‘PCM’ are typed out to help highlight any potential text rendering issues related to unusual subpixel structure, whilst the white space more clearly shows the actual subpixel layout alongside a rough indication of screen surface. This model employs a medium matte anti-glare screen surface with a fairly smooth surface texture. The screen surface offers good glare handling, whilst the fairly smooth surface texture prevents an obvious grainy look to lighter shades. There is just a light ‘misty’ graininess, no ‘smeary’ graininess nor a sandy appearance. This provides a somewhat smoother appearance to lighter shades than offered by competing TN models. The screen surface isn’t quite as ‘light’ or low haze as on competing VA models such as the C24G1. Gamer Network Limited, Gateway House, 28 The Quadrant, Richmond, Surrey, TW9 1DN, United Kingdom, registered under company number 03882481.
The AOC 24G2 FreeSync range is 48-144Hz, and it works with compatible NVIDIA GPUs without issues as it’s officially certified as ‘G-SYNC Compatible.’We used a small tool called SMTT 2.0 and a sensitive camera to compare the 24G2U (24G2)’s latency with a screen of known latency. To help maximise accuracy, over 30 repeat readings were taken. Using the method, we measured 3.79ms (a bit over 1/2 a frame @144Hz) of input lag. The status of the ‘FreeSync’ (‘Adaptive Sync’) setting in the OSD made no measurable difference to this result and neither did activating the MBR (Motion Blur Reduction) feature. This value is influenced both by the element of input lag you ‘feel’ (signal delay) and the element you ‘see’ (pixel responsiveness). It indicates a low signal delay which shouldn’t bother even sensitive users. We don’t have the means to accurately measure input lag with Adaptive-Sync active in a variable refresh rate environment. As above with some gamma curve changes. The average gamma is now ‘2.1’, but the top and bottom of the curve (dark and light shades) sits above and mid-section (medium shades) below this. The overall changes to the image are reasonably subtle. You will also see in the image above that it states: “Selected Display is not validated as G-SYNC Compatible.” This means Nvidia hasn’t specifically tested and validated the display, not that it doesn’t work. This model worked properly using Adaptive-Sync (G-SYNC compatible mode) on our Nvidia GTX 1080 Ti, offering an experience that was very similar to using AMD FreeSync. A slight difference is that the floor of operation appeared to be 60Hz (60fps) rather than 48Hz (48fps). However; an LFC-like technology was supported, with the monitor keeping at a multiple of the frame rate with its refresh rate. There was again a momentary stuttering as the boundary was crossed, as we observed with our AMD GPU as well. VSync is configured in the ‘Gaming’ section of ‘Radeon Settings’, where it is referred to as ‘Wait for Vertical Refresh’. You can either configure this globally under ‘Global Settings’ or for each game individually. The default is ‘Off, unless application specifies’ which means that VSync will only be active if you enable it within the game itself, if there is such an option. Such an option does usually exist – it may be called ‘sync every frame’ or something along those lines rather than simply ‘VSync’. Most users will probably wish to enable VSync when using FreeSync to ensure that they don’t get any tearing. You’d therefore select either the third or fourth option in the list, shown in the image below. The final option, ‘Enhanced Sync’, is a relatively new addition to the driver. This is an alternative to VSync which allows the frame rate to rise above the refresh rate (no VSync latency penalty) whilst potentially keeping the experience free from tearing or juddering. This requires that the frame rate comfortably exceeds the refresh rate, not just peaks slightly above it. We won’t be going into this in detail as it’s a GPU feature than a monitor feature.
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