I am having second thoughts about getting a G-Sync monitor after reading up on this thread a bit. All this stuff with ghosting and blurring and overclocking. I think i would do just fine with a 144hz refresh rate and save myself some money in the process. However! I have a very stupid question for you gaf; im sorry, i have never actually seen anything higher than 75hz (just recently) i have been living my whole life thinking that the human eye can't "really" see anything higher than 60. Until recently i have witnessed 75 refresh rates at a friends place (playing overwatch) and i could immediately notice the smoothness of it. Hence my consideration for G-Sync.
I don't think that high refresh rate displays are worth it without also supporting variable refresh rates. (G-Sync for NVIDIA, FreeSync for AMD)
It is only "overclocking" in the sense that it exceeds the DisplayPort 1.2 spec, so it's possible that not all cables will support it. It is expected that most people will use their displays with this option enabled.
G-Sync was not created to eliminate motion blur. By supporting >60Hz refresh rates and having tightly controlled overdrive, it does reduce motion blur somewhat.
The technology is designed to improve game smoothness and eliminate screen tearing without adding latency, rather than eliminate motion blur.
The way to fix motion blur is to make the display flicker by strobing the backlight, just like CRTs used to flicker.
That's what ULMB does. You cannot (currently) combine G-Sync with ULMB - you have to pick one or the other. Most 144Hz+ G-Sync displays also support ULMB, though it's typically limited to 85/100/120Hz.
Anyway sorry i got derailed off my question; so what happens if im running my games at a lower fps than my screens refresh rate? Lets say im playing Red Dead Redemption 2 at 60fps on a 144hz monitor?
Without G-Sync, you will have stuttering (always) and either tearing (V-Sync Off) or input lag (V-Sync On).
Yes, thank you. What i meant though, is with Vsync on? Would that mean that the monitor refresh rate is also variable? In other words: 144hz monitor with vsync on , game running at say 60fps would that introduce tearing? Or would the monitor refresh rate go down to 60 to match that of the game?
V-Sync will prevent tearing. However it adds lag, and you would have to lock the game to a divisor of the refresh rate for it to be smooth: 144, 72, 48, 36 FPS.
You cannot play 60 FPS games smoothly on a 144Hz display - it will stutter constantly. You could manually set the refresh rate to 60Hz or 120Hz though.
The point is that G-Sync automatically syncs the refresh rate to the framerate no matter what it is, rather than updating at a fixed rate.
With a fixed refresh rate display, even if you drop the refresh rate to 60Hz you cannot guarantee that the framerate will
always be 60 FPS unless it's an old game that isn't demanding to run at all.
If the game drops to 58 FPS on a 60Hz display, it will stutter. On a G-Sync display, the refresh rate will also drop from 60Hz to 58Hz and it will remain smooth rather than stuttering.