Game Fire is so useful because it helps in limiting and turning off many functionality of Windows which is not required to play games. This in turn also saves some system resources so that they can be used by the game instead, thus giving you a slightly better overall performance.
Once Gaming Mode is enabled, it will automatically sit in the system tray taking only 2MB of memory. The only requirement to run is .NET Framework 3.5 minimum with
Service Pack 1 installed. It works on Windows XP, Windows Vista, and Windows 7.
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