There are essentially two ways in which you are moving the monitor gaming at the moment. On the one hand there is the increase in resolution that pushes more and more insistently to the 4K, and the other the development of specific technologies to solve the perennial problem of tearing. The first aspect is the responsibility of the producers of panels which in the past year have gone through a substantial increase in sales, a sign that the market is responding well to this technology now becoming more widespread on the gaming. The adoption of these monitors, however, is tied doubly with the performance of the video card that must be able to guarantee a gaming experience smooth and satisfactory, and especially without delays and drops in frame rate due to bottlenecks. In this sense, the ability to achieve good results with a single GPU definitely open the doors of 4K for PC gamers, always first experimenters of new technological frontiers in the field of gaming. NVIDIA and AMD have this goal in sight and certainly the next generation of hardware will try to replace today’s multi-board configurations with a single employing new manufacturing processes and new types of memories. Always the two giants of the industry are responsible for the other question to which we referred at the beginning, or the development of specific technologies related to the resolution of tearing. On the one hand we have the FreeSync with AMD and NVIDIA with the other G-SYNC, two technologies are diametrically opposed with the second now ready to land on notebooks.
Tearing and ghosting
We learned about the technology from NVIDIA G-SYNC in the past two years thanks to a handful of high-end monitors who first implemented the module for managing screen update. For the resolution of tearing it, the giant Santa Clara decided to move not only on the software, but also on the hardware. When the video card sends a frame to the monitor, this goes first to the scaler and then is sent to the panel to be displayed by the player. 
The G-SYNC is a technology that takes the form of a processing chip which replaces the scaler mounted on monitors with a traditional special developed by NVIDIA. This is a bridge between the video card and monitor going to manage the synchronization of frame rate always dancing with the refresh rate of the screen instead is fixed, so as to avoid unwanted effects graphics. The tearing fact is nothing more than an annoying phenomenon caused by the imperfect synchronization between the video card and the monitor, specifically when the first sends to the screen a frame before it has finished showing the previous. The result is a cut of the net where one side displays the new frame sent from the GPU and the other continues the previous one. For best results with no input lag and without impacting performance synchronization must be total and that is why the system is compatible only with NVIDIA graphics cards GTX Series 6 or later, so as to control the entire path of the frame. However, not everything is resolved with the inclusion of a scaler appropriate, but behind the performance of the G-SYNC there are complex lines of code that manage the operation. Besides the possibility of being able to use even in a window, including the latest news about this technology is the “low frame rate overcorrection” that goes to counter the flickering that is created once the frame rate drops below 35 FPS. One solution is to activate the V-Sync, creating a roof and establishing a sort of refresh rate fixed, but if this is variable once it drops below 35 FPS, the “low frame rate overcorrection” causes the monitor shows the image several times, ie doubling (or more) the speed of update of the image to eliminate the artifact. Another challenge related to the G-SYNC is the management of the color changes in the LDC panel: when the frame rate is fixed, this transition occurs at set intervals, but if the value varies from one frame to another happens that the LCD panel can predict exactly when it will arrive the next frame effectively creating ghosting or ghosting, caused by pixels that keep a fragment of the last color and therefore part of the previous image remains visible on the screen for several frames. NVIDIA has solved the problem with the “variable overdrive”, also called “anti-ghosting” that always works through the G-SYNC and is an estimated time of arrival of the next frame and varies accordingly update times Color LCD always with the aim to align them with those of the frame rate. This is a very complex and delicate, because if time synchronization between GPU and monitor are not perfectly aligned would create effect wake even more pronounced and annoying, but according to the statement from the NVIDIA all goes well and especially without causing latency.
Even on notebooks
On the other hand AMD is working to FreeSync that does not require a separate scaler, makes no distinction of components and this will be compatible with all monitors on the market. The real difference, however, is in the notebook market, where AMD has self excluded games left so far free field at NVIDIA, which within a few years has made a great leap forward with its dizzying mobile video cards . 
The arrival of architecture Maxwell on notebook was a true turning point given the ability to combine high performance with extremely low power consumption , a combination suited to the notebook market. The park title usable on notebook gaming is now pretty much similar to that for fixed PC, with due compromises dictated by the components used by each manufacturer to lord it on the final performance. The introduction of the G-SYNC also in this field therefore it represents a further and important evolutionary step that, as is the case for fixed PCs, allows to obtain a further increase in performance using a technology better performance than the V-Sync. The great advantage in this case is that the link between the GPU and the panel is directly and precisely for this is not necessary the presence of a scaler as happens in desktop models. This leads especially an advantage in terms of costs because it is precisely the scaler to impact more on the selling price of the monitor, ensuring a certain continuity of prices than before. On the other hand, however, NVIDIA has been working closely with manufacturers to develop this technology and the first notebook models to arrive on the market with the new G-SYNC will also monitor refresh rate to 75Hz, of course , they will always be synchronized with the video card. specifically in a press event held in Paris just in the European offices of NVIDIA have been able to experience firsthand the G751 with ASUS GTX 980M, panel at 75Hz and G-SYNC. Hard disk was installed GTA V, which ran at maximum detail, fluid and without the presence of the phenomena of tearing present especially when changing shots and fast rotations of the camera with the V-Sync. The result was very positive and we are very keen to get your hands on these new notebooks for a more thorough test. In addition to Asus, there will also be the MSI GT72G and two new models that Gigabyte and Clevo will implement the new technology and NVIDIA will appear soon on the market.
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