Intel C621 , S3647 , CPU's Xeon , Maximum number of CPUs 2 , EATX , 4xPCI-Express 3.0 8x , 3xPCI-Express 3.0 16x , 1xM.2 , DDR4 , Memory features RDIMM/LRDIMM , Memory slots 16 , 1x15pin D-sub , 7xUSB 3.0 , 1xCOM , 2xRJ45 , 1xCOM via Header , LAN Gigabit , RAID SATA 0, 1, 10