This is a new memory management tool designed to allow your frequently used programs additional memory by making better use of your systems random access memory (RAM). Over time, Vista can anticipate your program usage based on past experiences and makes sure that you have enough memory preloaded when needed. By utilizing the RAM more efficiently programs will launch much quicker because the system does not have to load them from the hard drive. They are in fact, preloaded to main memory. SuperFetch works with another tool called ReadyBoost. ReadyBoost makes SuperFetch's memory management expandable by drawing available memory from a USB 2.0 flash drive. Both of these tools working in tandem ensure that enough memory is available for optimum system and program performance.