Build the perfect workstation for your needs. The HP Z640 Workstation, featuring Windows 8.11 or Linux, provides incredible expansion in a small footprint. Get the storage, performance, and freedom you need to create with up to 8 memory DIMMs, up to 4 internal hard drives, and built in USB and SATA ports. With the innovative HP Z Turbo Drive10 set a new performance curve as you revolutionize how you handle large files and reduce boot up, calculation, and graphics response time. And thanks to Thunderbolt™ 13 technology, you'll transfer data at lightning-fast speeds with the ability to connect to high-resolution displays and high-performance data devices over a single Thunderbolt™ cable.