inspired, Reliable Design The Optiplex 3020 Provides You With The Choice Of Two Durable Chassis Sizes Designed To Integrate Seamlessly Into Your Office Environment. Built With Thumbscrews For Tool-less Serviceability Makes The Optiplex 3020 One Of The Most Serviceable Commercial-level Desktops On The Market. Dell Optiplex Is Synonymous With Stability, Longer Lifecycles And Easily Managed Transitions. Dell's Chassis Have Undergone Dell Reliability Testing To Help Ensure They Are Built To Last.