ReadyBoost is a feature introduced in Windows Vista, which can speed up your computer by using storage space on most USB flash drives and flash memory cards. When you plug a ReadyBoost-compatible storage device into your computer, the AutoPlay dialog box offers you the option to speed up your computer using ReadyBoost. ReadyBoost Monitor is a freeware tool to monitor the usage of resources by the ReadyBoost device.
It is a small application that monitors ReadyBoost, peaks, cache size, graph, read and write speed. The application is portable and does not require any installation.
Download ReadyBoost Monitor [Via