Step 1 remove the side of the case by unscrewing the screws the particular one I have has 1 thumbscrew some have 2 phillips head screws and some cases have to have screws all around them taken out so do what you need to do ( i have recently added this I have worked on a newer dell and it has latch/clips or something like that but if you're going to start working on a pc you should be able to figure this out).