Let's take a look at the latest full-tower case from Thermaltake, the Overseer RX-I, which has eight expansion slots and comes with an external 3.5"/2.5" docking bay.

Here is a snippet: "The Overseer RX-I is the latest full-tower case from Thermaltake. However, its physical dimensions are similar to mid-tower products from other manufacturers. Unfortunately, there is no official standard to categorize a case as full-tower or mid-tower. According to Thermaltake, they are saying this case is a full-tower model because it has four 5.25" bays, eight expansion slots, and supports E-ATX motherboards, even though the typical full-tower case looks bigger."



Link: Hardwaresecrets