Type: HP Z Series Z620 Workstation. Seller refurbished unit may show minor signs of cosmetic blemishes.Processor: Single Intel Xeon E5-2660 Eight Core 2.2Ghz Processor. 16 Virtual Cores in Hyperthreading Mode! (Additional processor configurations available).Memory: 128GB. Supports up to 192GB of total memory, 12 DIMM slots, 6 slots per CPU (actual memory speed dependent on processor capability).Hard Drives: 1TB 7.2K PC SATA Drive and 2TB 7.2K PC SATA Drive (Additional solid state or hard drive configurations available).Drive Bays: Up to three 3.5'' or 2.5'' (adapter needed for 2.5'') internal SATA, SAS or SSD hard drives. 2 external 5.25" bays. Raid Controller: SATA RAID 0, 1, 5, and 10 support standard on motherboard. Interface includes: 2 channels of SATA 6.0 Gb/s, and 8 channels of SATA 3.0 Gb/s. Graphics: Dual DVI 256MB Graphic Card (Additional graphic cards available).Operating System: Windows 10 Professional 64-Bit Pre-Installed (32-bit available on request).Power Supply: 800 Watt 90% Efficient Power SupplyOptical Drive(s): DVDRW Drive.Dimensions: 45 Lbs, 18.3'' x 6.75'' x 17.5'' (L x W x H)Networking: Dual Integrated Intel Gigabit Ethernet.Slots: 1 Full-Length x8 PCI-Express Slot 1 Low-Profile x8 PCI-Express Slot.Front Ports: 2 x USB 3.0, 1 x USB 2.0, 1 Headphone, 1 Microphone, 1 iIEEE 1394A.Rear Ports: 2 x USB 3.0, 4 x USB 2.0, 2 x RJ-45 Integrated Gigabit LAN, 2 x PS/2, 1 x Audio Line-In, 1 x Audio Line-Out, 1 x Microphone.Peripherals: Power Cable Included. Mouse, Keyboard, and Video Cable Not Included.*Systems are built to order and fully customizable. Please call for more information. Note that a stock photo is used and unit may differ depending on configuration.