Type: Dell Precision T3500 Workstation. Seller refurbished unit may show minor signs of cosmetic blemishes.Processor: Single Intel Xeon E5520 Quad Core 2.26Ghz Processor. 8 Virtual Cores in Hyperthreading Mode! (Additional processor configurations available).Memory: 4GB. Supports up to 24GB 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: Chassis supports up to four internal SATA drives (8.0TB storage maximum) or three SAS drives (SAS drives require SAS 6/iR controller card). 3rd and 4th Hard Drive options require 5.25'' adapter with fan.Raid Controller: No integrated raid controller. Optional SAS 6i/R raid controller may be added. Graphics: Dual DVI 256MB Graphic Card (Additional graphic cards available).Operating System: Not Included.Power Supply: 575W 85% efficient Power Factor Correcting (PFC) power supply.Optical Drive(s): DVDRW Drive.Dimensions: 45 Lbs, 18.54'' x 6.73'' x 17.64'' (L x W x H)Networking: Integrated Broadcom 5761 Gigabit Ethernet controller with Remote Wake UP and PXE support.Slots: All full-length except as noted. Two PCIe x8 slot wired as x4 (half-length); two PCIe x16 Gen 2 graphics slots; two PCI slots.Standard I/OPorts: Eleven USB 2.0: two on front panel, six on back panel, three internal (UDOC) on motherboard; eSATA: one rear; one serial; one parallel; two PS/2; one RJ-45; stereo line-in and headphone line-out on back panel; microphone and headphone connector on front; IEEE 1394a ports are provided with optional 1394 PCIe card.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.