TS-453DU-RP-4G-US
QNAP 1U 4-bay NAS/iSCSI IP-SAN, Intel Celeron Quad-core 2.0GHz (up to 2.7GHz), 4GB RAM, HDMI1.4b, 10GbE-ready, PCIe Expansion Slot, Redundant PSU. Intel Celeron Gemini Lake J4125 4-core 2.0GHz, 4GB DDR4 SODIMM RAM (2x2GB, max 8GB), SATA 6Gb/s, 2 x 2.5GbE, 1 x PCIe 2.0 x2 slot, Intel UHD Graphics 600, 4K HDMI v1.4b, 2 x USB 3.1 (Gen1), 2 x USB 2.0, 2 x 250W PSU

TS-453DU-4G-US
QNAP 1U 4-bay NAS/iSCSI IP-SAN, Intel Celeron Quad-core 2.0GHz (up to 2.7GHz), 4GB RAM, HDMI1.4b, 10GbE-ready, PCIe Expansion Slot, Single PSU. Intel Celeron Gemini Lake J4125 4-core 2.0GHz, 4GB DDR4 SODIMM RAM (2x2GB, max 8GB), SATA 6Gb/s, 2 x 2.5GbE, 1 x PCIe 2.0 x2 slot, Intel UHD Graphics 600, 4K HDMI v1.4b, 2 x USB 3.1 (Gen1), 2 x USB 2.0, 250W PSU