Type: HP Z Series Z420 Workstation. Seller refurbished unit may show minor signs of cosmetic blemishes.Processor: Single Intel Xeon E5-1620 Quad Core 3.6Ghz Processor. 8 Virtual Cores in Hyperthreading Mode! (Additional processor configurations available).Memory: 32GB. Supports up to 64GB of total memory, 8 DIMM slots, 2 Channels per CPU (actual memory speed dependent on processor capability).Hard Drives: New 512GB 6Gb/s SATA Solid State Drive (Additional 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. 3 external 5.25'' bays. Raid Controller: SATA RAID level 0, 1, 5 and 10 and SAS RAID level 0, 1, 10 available on motherboard. Graphics: Nvidia Quadro K5000 4GB GDDR5 Graphic Card (Additional graphic cards available).Operating System: Windows 10 Professional 64-Bit Pre-Installed (32-bit available on request).Power Supply: 600W 88% Efficient wide-ranging, active Power Factor Correction.Optical Drive(s): DVDRW Drive.Dimensions: 40 Lbs, 17.6'' x 7'' x 17.5'' (L x W x H)Networking: Single Integrated Intel GbE LAN.Slots: 2 PCIe Gen3 x16, 1 PCIe Gen3 x16 (with 2nd CPU), 1 PCIe Gen3 x16 mechanical/x8 electrical, 1 PCIe Gen3 x8 mechanical/x4 electrical, 1 PCIe Gen2 x8 mechanical/x4. Front Ports: 2 USB 3.0, 1 USB 2.0, 1 IEEE 1394a standard, 1 Headphone,1 Microphone.Rear Ports: 2 USB 3.0, 4 USB 2.0,1 IEEE 1394a port, 2 PS/2, RJ-45 (NIC), 1 Audio Line-In, 1 Audio Line-Out, 1Microphone. Internal Ports: 6 USB 2.0 ports available by three separate 2x5 headers: each header supports either a HP Internal USBPort Kit or USB Media Card Reader, one on each header. Each Internal Port Kit has two USB 2.0connectors.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.