Win10 Game Mode's real-world results tell you if it's useful or not

Win10 Game Mode is unique in its own way. The biggest change to Win10 Game Mode is the redistribution of workloads for games, which previous versions of Windows also maximized for gaming performance, but not intelligently.

In short, if Game Mode determines that a particular game allocates 80 percent of its CPU resources, Windows will ensure that the remaining processes allocate the remaining 20 percent. By limiting the use of background resources, it ensures that the game runs smoothly and prevents lag during game play.

Win10 Game Mode doesn't make frame rates skyrocket; in fact, its main task is to optimize the machine's existing performance, so it can't dramatically boost game frame rates out of thin air.

Secondly, Game Mode boosts both traditional desktop games and UWP games, but some traditional desktop Win32 games can directly invoke system-level services, and UWP games will get a slightly larger performance boost in most cases.