Asus ESC4000-E11-26WGP Barebone System - 2U Rack-mountable - 2 x Processor Support - 2 x Intel Xeon 4th Gen - Intel C741 Chip - 4 TB DDR5 SDRAM DDR5-4800/PC5-38400 Maximum RAM Support - 32 Total Memory Slots - Serial Attached SCSI (SAS), Serial ATA Controller - 4 3.5" Bay(s) - 2 2.5" Bay(s) - Network (RJ-45) - 1 M.2 Interface(s) - 2 SATA Interface(s) - Gigabit Ethernet - Windows Server, Red Hat Enterprise Linux, SuSE Linux Enterprise Server, CentOS, Ubuntu Supported Operating System - 6 USB: