Readyboost is NOT virtual RAM from a flash drive.
Readyboost is NOT RAM at all.
Readyboost is a cache used by your hard drive. Basically it copies stuff you normally use to the speedy Readyboost cache, where it can be used faster. Readyboost give an all round performance boost, and is more noticeable with older, slower hard drives. The more you have, and the faster it is means more boost....
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