QNAP TS-464U-RP-4G 72TB (WD RED PRO) 4-Bay 1U rackmount NAS; Intel Celeron N5105/N5095 quad-core; burst up to 2.9 GHz; 4GB DDR4 RAM (2 x SODIMM slots; max 16GB total); 4 x 3.5/2.5 SATA 6Gb/s drive bays; 1 x PCIe Gen3x2 slot; 2 x 2.5GbE; Intel UHD Graphics