Brand QNAP Operating System QuTS hero Processor Intel CPU Intel® Xeon® D-1622 quad-core 2.6 GHz processor (burst up to 3.2 GHz) Memory 16GB UDIMM DDR4 ECC (Max. 128 GB) Connections Built In 2.5GbE - USB 3.2 Hard Drive Bays 8-bay HDD Type 3.5-inch SATA 6Gb/s, 3Gb/s 2.5-inch SATA 6Gb/s, 3Gb/s PCIe Slot 2 Slot 1: PCIe Gen3 x8 Slot 2: PCIe Gen3 x8 USB 3.2 3 Form Factor Tower Power Supply Unit 250W PSU, 100~240V