Lenovo ThinkCentre M75s SFF Gen2 is a powerful and highly expandable business-class desktop computer. With two serial ports and an optical drive, the M75s SFF is also an excellent choice for retail environments. Key Features: Operating System: Windows 11 Pro 64-bit CPU: AMD Ryzen 5 PRO 5650G (6C/12T/3.9/4.4GHz/16MB) Chipset: AMD PRO565 Memory: 16GB DDR4 3200MHz UDIMM (1x16) Memory capacity max.: 128GB (4x32) Integrated graphics: AMD Radeon Graphics SSD 512GB M.2 2280 PCIe 4.0x4 NVMe Opal Storage support: 1x2.5/3.5"HDD and 1x2.5"HDD SATA Installation kits for additional drives must be purchased separately as an option Optical Drice: internal DVD+/-RW Card Reader: 3-in-1 (SD/SDHC/SDXC) Internal Speaker: 1x1W LAN 100/1000M Gigabit Ethernet Lenovo USB keyboard and USB Mouse included Front panel: 4xUSB3.2, 1xUSB-C 3.2 Gen1, 1x3.5mm audio combo, 1x3.5mm Mic Back panel: 2xDisplayPort 1.4, HDMI 1.4b, 4xUSB2.0, 2xRS232, RJ-45, 1x3.5mm Line Out Low Profile Expansion Slots: 1xPCIe 3.0 x1, 1xPCIe 3.0 x16 LP Card max. Size: