Hi. I just bought my first 144 Hz FreeSync monitor, and have spent the last couple of days reading a lot on how to get the most out of this technology.
I ended up finding this quick blurbusters guide: [https://www.blurbusters.com/gsync/gsync101-input-lag-tests-and-settings/14](https://www.blurbusters.com/gsync/gsync101-input-lag-tests-and-settings/14), and then spent a long time reading a lot of their excellent posts about Adaptive Sync.
Enough background. Now, to the point.
After quite a bit of reading, I learned that the optimal settings for playing League on a 144 Hz FreeSync monitor are:
141 FPS cap (much preferably using native game engine FPS cap) + nvidia/AMD control panel VSync ON.
This way, when my PC is able to deliver more than 141 FPS it should give me consistent frame times, no tearing and no additional input lag. And when it can't deliver 141 FPS, it should give the minimum input lag possible, without tearing.
I realized this game lacks a custom FPS cap option, which forces me to use the next best option: 120 FPS cap (which underutilizes my 144 Hz refresh rate and slightly increases input lag).
The next best option would be to use an external FPS limiter like RTSS, which introduces an extra 1 frame input lag. Not optimal.
The easiest solution: a custom FPS cap.
I know Riot's been adding quite a few new options to the FPS limiter over the past few years, which is nice. But those are still not optimal for Adaptive Sync users. Even the competitive players are suffering from this, though at 240+ FPS the input lag (or tearing, depending on which setting they decide to use) should be unnoticeable.
It would be so easy for Riot to fix this by adding a custom FPS capping option, or at least a "-3 FPS" option next to the current FPS limiter options. So please consider it to help your players get the most out of their hardware.
FreeSync/G-Sync users' most optimal setting would be to cap FPS to their max refresh rate -3, and turn on nvidia/AMD control panel VSync ON. This is currently not possible, so we need a custom FPS limiter option.