Lenovo ThinkSystem SR650 is an ideal 2-socket 2U rack server for small businesses up to large enterprises that need industry-leading reliability, management, and security, as well as maximizing performance and flexibility for future growth. The SR650 server is designed to handle a wide range of workloads, such as databases, virtualization and cloud computing, virtual desktop infrastructure (VDI), enterprise applications, collaboration/email, and business analytics and big data..No optical drive.Power device: hot-plug power supply.Connectivity interfaces: 1 x LAN-on-Motherboard (LOM), 1 x PCIe 3.0 x8, 1 x PCIe 3.0 x8 (for internal storage controller), 1 x PCIe 3.0 x16.3-year manufacturer limited warranty.TUV GS, BSMI CNS 13438 Class A, EN55024, EN55022 Class A, CB, ICES-003 Class A, RoHS, EN 60950-1, FCC Part 15 A, GB 17625.1, GB 9254 Class A, VCCI Class A, KN24, KN22 Class A, NMB-3 Class A, AS/NZS CISPR 22, GB 4943.1, BSMI CNS 14336-1, GOST-R 51318.24, GOST-R 51317.3.2, GOST-R 51317.3.3, IEC60950-1, EN61000-3-2, EN61000-3-3, NOM-019, EK1-ITB2000, GOST-R 51318.22, UL/CSA60950-1, GOST ME01.Four expansion slots for upgrading your system.Rack mount server.12-core processor.Dimensions: 3.43"H x 17.5"W x 28.35"D