Redefine versatility and flexibility. Expand your capabilities with HP\'s Z640 Workstation offering powerful performance, whisper-quiet computing, and tool-less access in compact design. **Power up** Experience massive workstation power with support for 145W processors powering up to 36 cores in a dual Intel Xeon processor configuration. The HP Z640 Workstation uses Z DNA to provide a high-end workstation experience. **Versatility redefined** Build the perfect workstation for your needs. The HP Z640 Workstation featuring Windows 8.1 provides incredible expansion in a small footprint. With up to 8 memory DIMMs, up to 4 internal hard drives, optional Thunderbolt 2, and the HP Z Turbo Drive, you get storage, performance, and the freedom to create. **Experience the quiet** Concentrate on your work using a workstation that is whisper quiet. When every inch, watt, and decibel makes a difference, count on the HP Z640 Workstation.