How to open dell optiplex case?
Press the oval button on the case's top, and the GX260 splits into two halves (much like laying a book on its binding and opening it in the middle), revealing a spacious interior that makes servicing easy. You won't need to lug around a tool set to add or replace parts. In fact, every component inside the case can be removed without tools.
Which one? There are a few of them ... here's a link to manuals for them: http://funadvice.com/r/1551pm6lo7b
what is it?