Quote:
Originally Posted by Rooksx
I'd like to get a 1440p/144 Hz monitor and the RTX 2070, maybe when the price falls a bit. Is G-Sync worth the premium? Judging from benchmarks, you're still not getting anything close to 144 FPS with any graphically demanding game, so it's still unclear to me if G-Sync would offer a tangible benefit.
The benefit of G-Sync is only when you *aren't* getting enough frames from the GPU to refresh the monitor every time it is ready to do a new frame. Without G-Sync, there are basically two things you can do:
1. Nothing, in which case the GPU hands a frame over to monitor as soon as it is ready, but without regard to where the monitor is in the process of putting the frame it currently has on the display. This can lead to tearing, which happens when the monitor puts up parts of two different frames into one refresh of the monitor screen.
2. You can fix that problem in software with V-Sync, which basically just tells the GPU not to render more frames than the max refresh rate, and also to hand them over only when the monitor is about to start rendering a new frame. If you have higher GPU FPS than monitor Hz, this completely fixes the problem. The downside here is that if the GPU *can't* keep up with the monitor's refresh rate, it has to drop down to 50% of that rate. If it takes 8ms for a 120 Hz monitor to do one refresh, that means that the GPU has 8ms to do the next frame and hand it over for the next refresh. If it take 9ms, then it has to wait for the monitor to finish with its current refresh (otherwise there would be tearing), meaning you are effectively stuck at 60 Hz/FPS (with each frame being refreshed twice), even if if your GPU could render 100 FPS.
G-Sync I don't really understand, but basically it has the monitor sync the refresh process to the rendering of new frames. So if it takes 9ms to render a frame, the monitor refreshes its current frame over a 9ms period, then takes the new frame and renders that one. That lets you use every frame your GPU produces (up to the max for the monitor) without ever displaying more than one frame in a single refresh cycle.