Though BlueStacks does not provide any official System Requirements on their website, these specifications have been found to be the least requirements for running BlueStacks on Windows.
There are a lot of background process running behind the actual application and it requires a minimum of 2 GB RAM to run smoothly. A minimum of 2 GB Physical Memory (RAM): The interface of BlueStacks might look stunningly simple but, it, and the Android Apps that it plays are typical resource hogs.