This new mode in Special K is very similar to "scanline sync" in RTSS, except it controls the render thread to reduce latency even more. Additionally, you can delay the game's render thread by a fraction of the frame rate to reduce input latency even more.
This feature is called "delay bias", you can see in the screenshot
For Hollow Knight I have it set at 75% input, 25% frame. This means that the rendering of the game is being delayed until the last 25% of the frame time, and therefore the polling of the input is also delayed.
Essentially, this means at 100hz, I get the the same input latency as if I was running the game at 400fps. You can also achieve latency like this by using something like Nvidia's fast sync, but with Special K, you have absolutely pefect frame pacing, and your GPU is resting instead of rendering a bunch of redundant frames.
Hollow Knight plays unbelievably snappy with this configuration. The little guy feels like he is electrically connected to the d-pad.
To enable latenct sync, you just click in the box for setting a frame rate limit, which brings up the submenu for Latent Sync
Latent sync will most useful to people without VRR or with it disabled. Say you're using BFI/strobing on a certain display and have to run a fixed refresh rate. Or if you're a based CRT user like me.
And Delay Bias is definitely a must for any game where you have enough GPU and CPU headroom to run well in excess of your max refresh rate, regardless of what display you're using.
Try it out and let me know what you think!
