This is the software publisher's description. 

Unique tool for optimizing the File Cache Management in Windows Vista, XP, Windows 2000, Windows 2003, and Windows NT. With the help of this software, it is possible to achieve enormous performance improvements. Depending on your specific configuration and resources, you can double you performance speed without an additional Hardware or reductions in system stability.

Through intelligent management of the file cache by O&O CleverCache, more memory is made available to the system, increasing overall performance. To achieve this, the software Every time your computer is booted, the system's memory configuration is detected. This software then adjusts its system settings to optimally respond to this configuration. In addition, users can take advantage of a diverse series of pre-defined profiles designed to enhance performance during specific applications or games. Users also have the ability to define individual profiles.

With the help of O&O CleverCache's Mem-O-Free function, the main memory can be defragmented, improving the speed at which applications and games can utilize memory resources. An additional function, Mem-O-Safe, reduces the risk of data loss in the event of a system crash by quickly transferring the data stored in memory to the hard disk. By way of the Status Monitor it is also possible to monitor the CPU, main memory, system cache, and hard disk, as well as gather additional information useful in tuning you system.