How to Use Pendrive as RAM memory in Windows 7?
Plug in your pendrive -> Format with NTFS or FAT32
Now go to properties ->Select REadyBoost
Check Use this device ->Choose maximum space to reserve system speed
Click on Apply and OK.Your Readyboost PenDrive is ready Now to Use
My Personal Suggestion is to use HP and SanDisk Pendrives for this work