USB drive as Ram

It speeds up your PC and improves application responsiveness by using flash memory and free RAM as an extra layer of performance-boosting cache for your PC. Use up to four inexpensive flash devices to speed up your system. Add more speed to your PC without any hardware upgrade!
Highlights

*Memory caching (if you have plenty of RAM installed);
*Exclude list (the most requested feature);
*Power saving mode;
*More than 4GB cache file size (on NTFS file system only);
*One flash drive use on different computers;
*Unlimited number of files in cache;
*Build cache process improvement (including initial statistics used from XP prefetch information);
*Load balancing mechanism improvements;
*And many small fixes and enhancements;