Vista ReadyBoost Flash Drive Requirements

Compatibility and requirements:

  • The capacity of the removable media must be at least 256 MB (250 after formatting)
  • Devices larger than 4 GB will have only 4 GB used for ReadyBoost
  • The device should have an access time of 1 ms or less
  • The device must be capable of 2.5 MB/s read speeds for 4 KB random reads spread uniformly across the entire device and 1.75 MB/s write speeds for 512 KB random writes spread uniformly across the device
  • The device must have at least 235 MB of free space
  • NTFS, FAT16 and FAT32 are supported
  • The initial release of ReadyBoost supports one device
  • The recommended amount of flash memory to use for Windows ReadyBoost acceleration is one to three times the amount of random access memory (RAM) installed in your computer