Readyboost is a new feature that lets a flash drive become RAM for your computer on this Windows operating system
When you take 
advantage of ReadyBoost, it utilizes another feature introduced in Windows Vista 
called ... to buy a new stick of RAM than it is to get a removable device that truly 
lets... [DOC] [TLE] How to Use a Pen (flash) Drive as RAM For Your PC [windows/linux] [PAR] You can easily use a pen drive to extend your RAM.