One thing to note. If you have an SSD in there now, that may be your boot drive, and you'll have to migrate your OS install from the old drive to the new SSD. And if you don't have an SSD and are booting off your HDD, then you still likely want to migrate your OS to the new SSD to take advantage of the better performance. So keep in mind you may need something like this in order to be able to migrate either old drive to your new one: