ASRock Rack Motherboard E3C232D4U-V1L mATX, 9.6 inch x 9.6 inch Intel Xeon E3-1200 v5 Series Processors Supports Dual channel DDR4 2133/1866 ECC and U DIMM max 64 GB Supports 6 SATA3 by C232 Supports 1x PCIe 3.0 x16, 1x PCIe 3.0 x8, 1x PCIe 3.0 x4(share with M.2), 1x PCIe 3.0 x1