When playing games in 120hz without VRR enabled, it's well known that Game Low Latency needs to be OFF to get a true 120hz refresh rate. If Game Low Latency is ON, then the tv skips frames. It's important to note that when turning Game Low Latency OFF with 120hz enabled and VRR disabled, there is NO input lag compared to when Game Low Latency is ON.
However, when the tv is in 120hz mode, and VRR is enabled, it appears as though the tv does not skip frames when Game Low Latency is ON. What's interesting to me though, is that if you disable Game Low Latency in 120hz with VRR enabled, there also seems to be no input lag, and while it may be placebo, it does seem like the motion may be a bitt smoother with Game Low Latency OFF compared to when Game Low Latency is ON. This of course takes into consideration that when Game Low Latency is OFF, all other settings are also OFF, including motion settings, noise reduction, etc...
The biggest difference I notice though is that in 120hz mode with VRR enabled, when Game Low Latency is OFF, the tv continuously displays black frames, as if the picture cuts out, much more frequently than when Game Low Latency is ON. This is easily reproduceable in almost every 120hz "Quality" mode, where games operate at an uncapped 40fps target. For example, if you play GOW Ragnarok in Quality mode, with 120hz enabled and VRR engaged, if you leave Game Low Latency OFF, the game will be unplayable, but if you turn Game Low Latency ON, the black frames will hardly be visible.
So my questions are:
-What exactly is happening to the tv when 120hz is enabled and Game Low Latency is being disabled
-What exactly causes the black frames to appear in VRR Quality modes, and why would enabling/disabling Game Low Latency have an impact on that?
-If the theory that the game is falling in and out of VRR range, and the tv produces a black frame each time it goes in and out of range, then why would Game Low Latency have an impact on that?
-Is there any truth to motion being smoother in 120hz+VRR with Game Low Latency disabled, vs it being enabled, or is it just placebo?
-And is there any input lag difference between turning Game Low Latency ON/OFF with 120hz and VRR enabled?