I think FreeSync is known by most because it is an open standard and most will have such a monitor with adaptive sync support. There are now various differences here. And the madness begins. What does this mean in detail? I’ll be brief, I promise!
FreeSync supports you in rendering a tearing-free image with low latency. Attention: The support here is done at the given refresh rate, e.g. 75 Hz, and what FPS you shoot on the screen beyond that. If you fall significantly below 75 Hz, things get weird very quickly – watch out for tearing! FreeSync Premium, on the other hand, can use VRR on my LG 27GL850-B, for example. Means FreeSync can adjust to the FPS between 48 to 144 and should you end up below 48 FPS, then the LFC kicks in. Low Framerate Compensation! Here, below 48 FPS, the image is output multiple times to get back into VRR. I still need to measure this for possible effects on latency. Coming soon!
FreeSync Premium Pro is technically “virtually” the same as FreeSync Premium only with HDR support.
Overwatch with RTX 3080 FreeSync Monitor AOC G2778VQ
Now let’s take a look at whether FreeSync (without VRR) has a negative impact on latency. For this, I used the same settings in Overwatch to remain comparable.
Again, there is no latency impact from FreeSync. For all monitor owners with adaptive sync, there is no reason to disable this feature!
If you want to use V-Sync at such low frame rates, you have to set your frame limit well below 70 FPS or live with a few milliseconds more system latency!
Even at 60 Hz, FreeSync does not have a negative impact on latency.
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