Case Type Tower , Chipset Intel C621 , Socket S3647 , CPU's Xeon , Maximum number of CPUs 2 , SATA 3.0 , 2xPCI-Express 3.0 8x , 4xPCI-Express 3.0 16x , 1x15pin D-sub , 4xUSB 2.0 , 2xUSB 3.0 , 1xCOM , 3xRJ45 , 1xCOM via Header , Memory type DDR4 , Frequency speed 2666/2400/2133 MHz , Memory features RDIMM/LRDIMM , Memory slots 16 , PSU Output Power 1280 Watts , EATX , 8x3.5" SATA Hot-swap , Cooling & Ventilation System 3x 80mm high-performance fans; 2x 80mm PWM Rear Chassis fans