ReadyBoost is an excellent feature that was brought into existence with the Windows Vista and later with Windows 7 as well. This feature enables your external volumes to be used as space for disk cache. You can use your Flash Drives, SD Cards as well as external hard disk drives for the job. ReadyBoost is supported for one device on Windows Vista while you can add multiple devices for Windows 7. Use of NTFS volume is suggested as you can use more of the volume for the purpose giving you with enough alternative space to act as your disk cache.

ReadyBoost Requirements

There are certain requirements for the device to be capable of being used as a ReadyBoost help.

The minimum denomination of the external volume that you are using for ReadyBoost should be 256 MB that would be 250 MB once it is formatted. The maximum size that was available for use in Windows Vista used to be 4GB while it has been revised to unlimited in the Windows 7.

You can add up to eight devices that would make the overall denomination to a maximum of possible 256GB size. This would serve as an additional memory giving you ultimate control over many applications.

The access time of the device should be really small. It should have an access time of less then 1ms or equal in order to make sure that it can be readily used.

The device needs to have a read speed of 2.5 MB/sec while the write speed suggested is at least 1.75MB/sec.

Turn on and off ReadyBoost

  • Follow the instructions below to make your external volume be used as ReadyBoost:
  • Connect your external volume with the computer, the pop up Autoplay options would rise.
  • Under the general section, click Speed up my system.
  • Inside the Properties, click the ReadyBoost tab on the top.
  • You would be given three options:
    • Do not use this device would turn ReadyBoost off and you won’t be able to use it as a ReadyBoost device.
    • Dedicate this device for ReadyBoost would dedicate the whole volume to be used for ReadyBoost and the whole of the system can be used for the process enhancing the speed of your system by many folds. The files already on your volume would not be touched while the rest of the space would be used to boost your system.
    • Use this device has a slider option with it that lets you limit the size of the volume that you would like to use as ReadyBoost.
    • On clicking OK, your selection would be saved and this device would be used to the ReadyBoost purpose every time you are going to plug it in your system.


The possible outcomes are remarkable for people who have low memory or the processes that they use need more memory to run smooth. The first test of this was made on a system with 512 Mb of ram that is the least requirement for Windows vista and it was noticed that the ReadyBoost gave it double the ram. A process that took place in 11.7 second was over in just 2 seconds.