Case Type 4U rack , Chipset Intel C621 , Socket S3647 , CPU's Xeon DP , Maximum number of CPUs 2 , SATA , SATA 3.0 , 2xPCI-Express 3.0 8x , 4xPCI-Express 3.0 16x , 1xM.2 , 1x15pin D-sub , 6xUSB 3.0 , 2xUSB 3.1 , 1xOptical S/PDIF , 2xRJ45 , 1xCOM via Header , Frequency speed 2666/2400/2133 MHz , Memory features RDIMM/LRDIMM/ECC , Memory slots 16 , PSU Output Power 1200 Watts , 3x5.25" External , 8x3.5" SAS/SATA Hot-swap , Cooling & Ventilation System 2 Super quiet PWM chassis fans (support up to 4 fans) , Colour Black