That will depend on the model and size of your case. The case needs to be a 3.5 inch, SATA case. This is NOT a smaller 2.5 inch drive. Here is the case builders web site: www.sabrent.com - Look up the case model you have and I am sure it will let you know what type of drive it will take. If you still have a question, take it to your local Best Buy and ask them for help. They are great at service !! Best of luck ..