During the game in the Assassin’s Creed: Syndicate game CPU use is constantly at 100%.
The problem with the CPU load in Assassin’s Creed: Syndicate due to poor optimization of the game. You play takes more resources than it needs.
Especially for this purpose there is a patch Assassin’s Creed Syndicate Patch Fix v.1.10 that corrects the problem of optimization in Assassin’s Creed: Syndicate. As a result of problems with the CPU load you will not.