Intel C246 , LGA1151 , CPU's Xeon UP , Maximum number of CPUs 1 , ATX , 1xPCI-Express 3.0 1x , 1xPCI-Express 3.0 4x , 1xPCI-Express 3.0 8x , 2xPCI-Express 3.0 16x , 1xU.2 , 1xM.2 , DDR4 , 2667/2400 MHz , Memory features UDIMM/ECC , Memory slots 4 , 1xHDMI , 1xDisplayPort , 2xUSB 2.0 , 4xUSB 3.1 , 1xCOM , 1xOptical S/PDIF , 1xStereo jack 3.5mm , 1xMicrophone jack 3.5mm , 1xHeadphones jack , 2xRJ45 , Video , Audio , RAID SATA 0, 1, 5, 10 , Included Accessories 1 x I/O shield1 x Quick start guide4 x SATA III 6Gb/s cables1 x CrossFire™ bridge