Lenovo ThinkSystem ST50 One Intel® Xeon processor E-2100 Series Up to 3.8 GHz with 4 cores, Up to 6 cores at 3.5GHz| Up to 4 DIMM sockets up to 64GB with UDIMM and Up to 2666Mhz DDR4 memory speed|ECC| Intel C246 chipset| HDD up to 8x or 16x 2.5" SAS/SATA hot swap| RAID 530-8i standard support RAID 0,1,10,5,50 | Ports: three USB 3.1 G1, two USB 3.1 G2, one USB 2.0, one RJ-45 GbE systems management, two RJ-45 GbE network ports, one VGA video, one Serial port | Upto four PCIe 3.0 slots| Half High SATA DVD-ROM or DVD-RW Optical Disk Drive | XClarity Controller Standard, optional upgrade to Advance or Enterprise  | G200 graphics with 16 MB memory with 2D hardware accelerator | Power Supply: 250W 80+ certified, not hot-swap, not redundant or 550W Platinum Redundant Power Supply  |Tower or 4U rack| Warranty 3 years 9x5 Next Business Day| Standard without Keyboard + Mouse