Apparently Nvidia has figured out a way to do a better synchronization between the GPU rendering the frames and the display showing them by adding an additional G-SYNC module inside the display (this means new gaming displays coming out with the module built-in them). The idea is that with this G-SYNC module you are supposedly getting a V-Sync off like experience in terms of responsiveness, but without the tearing of the image displayed on the screen. So less input lag and better responsiveness regardless of the FPS and supposedly no more tearing and stuttering. It all sounds great in theory if you are a gamer, but we need to see it first in action. There is still not a lot of information about this new technology, but hopefully Nvidia will soon provide more technical details…
With G-SYNC, the monitor begins a refresh cycle right after each frame is completely rendered on the GPU. Since the GPU renders with variable time, the refresh of the monitor now has no fixed rate.
This brings big benefits for gamers. First, since the GPU drives the timing of the refresh, the monitor is always in sync with the GPU. So, no more tearing. Second, the monitor update is in perfect harmony with the GPU at any FPS. So, no more stutters, because even as scene complexity is changing, the GPU and monitor remain in sync. Also, you get the same great response time that competitive gamers get by turning off V-SYNC.
The good news is that if you already have a Kepler architecture-based Nvidia GPU you will have the support available for the G-SYNC technology in your computer, so you will only need to get a new monitor with a G-SYNC module built-in. The initial partners that are supposed to offer PC monitors for gamers with the new G-SYNC module are Asus, BenQ, Philips and ViewSonic, all companies that also make 3D Vision compatible displays apart from Philips, and supposedly this extra module will not make the monitor significantly more expensive than a model without the module. There is some information available that the first monitor to support the new technology could be based around the 144Hz-capable ASUS VG248QE that also supports Nvidia’s 3D Vision technology, so G-SYNC hopefully will work just fine with 3D Vision in stereoscopic 3D mode providing even better experience (no word on G-SYNC and 3D Vision support from Nvidia yet). Have in mind though that the technology will be supported over DisplayPort interface only and the first G-SYNC-equipped monitors will probably be available in the first quarter of next year.