Type: HP Z Series Z400 Workstation. Seller refurbished unit may show minor signs of cosmetic blemishes.Processor: Single Intel Xeon W3530 Quad Core 2.8Ghz Processor. 8 Virtual Cores in Hyperthreading Mode! (Additional processor configurations available).Memory: 16GB. Supports up to 24GB (Gen I) to 48GB (Gen II) of total memory, Three-channel memory architecture per processor with up to 1333MHz DDR3 ECCRegistered DIMM memory. Up to 9 DIMM slots; 6 slots (2 per channel) on motherboard and additional 3 slots on optional 2nd processor riser card (actual memory speed dependent on the processor capability)..Hard Drives: 1TB 7.2K PC SATA Drive (Additional hard drive configurations available).Drive Bays: Up to two 3.5'' or 2.5'' (adapter needed for 2.5'') internal SATA, SAS or SSD hard drives. 3 external 5.25" bays. Raid Controller: Integrated SATA 3.0 Gb/s Controller, RAID 0, 1,10, 5 supported.Graphics: Nvidia Quadro 2000 1GB GDDR5 Graphic Card (Additional graphic cards available).Operating System: Windows 10 Professional 64-Bit Pre-Installed (32-bit available on request).Power Supply: 475 Watt 85% efficient power supplyOptical Drive(s): DVDRW Drive.Dimensions: 30 Lbs, 17.3'' x 8'' x 17.5'' (L x W x H)Networking: Integrated Broadcom 5764 LANSlots: 2 PCI slots (full-height, full-length) 1 PCI Express Gen2 slot x8 mechanical/x4 electrical, 1 PCI Express Gen1 slot x8 mechanical/x4 electrical, 2 PCI Express x16 Gen2 slots (one dedicated for graphics). Front Ports:2 USB 2.0, 1 IEEE 1394a standard, 1 audio out, and 1 microphoneRear Ports: 6 USB 2.0, 1 optional serial port, 2 optional IEEE 1394a or 1394b ports (requires PCI card), 2 PS/2, RJ-45 (NIC), 1 audio line in, 1 audio line out, 1 microphone in; audio ports can be retasked to function asline in, line out, microphone, or headphone.Internal Ports: 4 USB 2.0 ports available by two separate 2x5 headers: supports either up to two HP Internal USB PortKits, AMO- EM165AA (one port on each Kit), or up to two USB Media Card Readers, or one InternalPort kit and one USB Media Card Reader.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.