Tom Clancy’s Rainbow Six Siege is the latest installment of the online tactical multiplayer first-person shooter video game by Ubisoft Montreal. It was launched in December 2015 and is available for PlayStation 4, Xbox One, PlayStation 5, Xbox Series X|S, and Windows platforms.
To run the game requires enough hardware configuration to run properly, especially for PC, because not everyone may have such a configuration to run the game in full resolution and higher FPS. It’s quite common for most PC titles because they’re performance-hungry. Here, we’ve provided steps to fix Rainbow Six Siege Stuttering and Lags issues.
It’s quite unfortunate that some Rainbow Six Siege PC players are experiencing multiple issues like stuttering, lags, crashes, frame drops, etc., while in the gameplay. Depending on the compatibility factor, it can be a severe issue on some PCs. So, it’s always better to fix the issue so that at least you can play the game with a respectable FPS count. There may be several reasons behind such an issue that can be resolved by following this guide.
Check System Requirements
Check out the system requirements of the Rainbow Six Siege game below to ensure whether your PC configuration meets the game’s system requirements.


Its been a year I struggle with this problem. Actually very random… but finally I think I found the solution
Its CPU issue, that is sure.
The lag is by a bad tempo when Ubisoft Connect goes a bit crazy and blocks all ressources for CPU, its a freeze, but it creates confusion because the game understands it like latency and jitter (its not ! I have very good connection and never seen it before for any other game).
Short solution :
– Its CPU, on Ubi Connect AND rainbow process (details in task manager)
– Ubisof Connect processes (2) have to be isolated on 1 of your cpu, lowest priority (right click)
– Rainbow affinity on all other cpu, high priority (right click)