Lenovo TS-440 ThinkServer Tower. Xeon E3-1225 Processor at 3.2 Ghz, 4 cores. 16 Gig DDR3 ram LSI-MR9240-8i RAID controller. 3 X 500 Hot Swap hard drives installed. Currently in RAID 5 configuration. Dual Hot Swappable power supplies. No operating system included, but Windows 2019 server is loaded for proof of operation currently.