Performance you want. Value you need. The HP Z420 gives you professional expandability in an accessible tool-free mini-tower form factor - all at a great price. With up to 8 discrete processing cores, the latest processing and I/O power from Intel®, and the latest graphics technology from leading graphics providers, the HP Z420 has the power you need to get the job done. Featuring Genuine Windows 7 Professional and/or other operating systems Designed With Ease. - Enjoy the control that comes with being able to swap out parts or make upgrades on your own. The HP Z420 Workstation features a smart chassis that offers tool-less access to the inside, easy configurability and optional optical bay handles for seamless deployment. - And with optional liquid cooling designed to deliver whisper-quiet performance, the HP Z420 is built to make your work flow smoother. Enjoy Superb…