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."
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips