HP Z820 Intel Xeon E5-2665 2.4 20M 1600 Windows 8 Professional 64 Bit downgraded to Windows 7 Professional

Built for high-end computing and visualization. The dual-processor HP Z820 Workstation delivers outstanding performance, award-winning industrial design, and tool-free serviceability in the industry’s most expandable chassis. With next generation Intel® Xeon® processors, support for up to 16 processing cores, and the latest professional graphics, you’ll tackle even the most demanding projects like never before.

Unmatched Design. Inside and Out.

• With its expandable design, the HP Z820 Workstation gives you the confidence to produce your best work.
• Designed for a wide-range of needs, the HP Z820 offers enhanced tool-free access and unbelievable power at whisper-quiet levels. 

Multitasking Made Easy. 

• The HP Z820 Workstation employs a variety of Intel® Xeon® E5-2600 processors that enable next generation PCI Express technology. With support for 2 processors, the HP Z820 can operate with up to 16 processing cores, delivering ultimate performance to help you accomplish more every minute.
• Featuring the C600 series chipset, LSI SAS 2308 controller, and dual Quick Path Interconnects between the processors, the two work together to help you work more effectively than ever before.

Ultra-Powerful Visuals and High Performance Computing.

• Built to support next generation PCIe Gen3 graphics from AMD and NVIDIA, the HP Z820 Workstation currently offers a wide range of cards from Pro 2D to ultra high-end 3D graphics to get the job done.
• With dual graphics processor support, the HP Z820 can drive up to 8 displays, giving you the power and space you need to multitask like a pro. Plus, get the highest performing GPU computing solutions available in the Z family, like NVIDIA’s Maximus, on the HP Z820.

Space to Fill.

• This rackable system provides 7 expansion slots, 7 expansion bays and 4-channel integrated DDR3 memory with 16 slots and support for up to 512GBs.
• With USB 3.0 ports on the front and internal to the system, the HP Z820 Workstation offers a variety of storage and I/O options including a wide range of internal HDD/ODD and external SATA devices to increase flexibility.