Z220 D8D17UT Convertible Mini-tower Workstation - 1 x Intel Core i7 i7-3770 3.4GHz Choose the expansive Convertible Minitower or the space-saving Small Form Factor design - both complete with tool-free chassis that make adding hard drives and upgrading memory a snap. Take advantage of world-class architecture with the latest in connectivity for external storage devices and peripherals. Transfer data 10x faster than USB 2.0 ports with four integrated super-speed USB 3.0 ports. Business-built and environmentally aware - featuring a 90% efficient power supply, BFR/PVC free configurations and your choice of ENERGY STAR qualified configurations. Increase performance and reduce energy consumption with next-generation 22nm processors Give memory intensive applications a boost with 1600 MHz DDR3 memory technology and support for ECC memory configurations to help protect your data integrity.