The TS-473 is powered by a high-performance and energy-efficient AMD R-Series CPU and provides two PCIe slots for greater functionality. You can install a QNAP QM2 expansion card to add M.2 SSD caching/10GbE connectivity; a compatible wireless card to use the TS-473 as a wireless access point; and an entry-level graphics card to boost system performance for 4K video performance. The TS-473 allows you to flexibly deploy a wide range of applications with a more affordable budget CPU Processor: AMD R-Series RX-421ND quad-core 2.1 GHz processor, Turbo Core up to 3.4 GHz Architecture: 64-bit Encryption Engine: AES-NI System Memory 4 GB DDR4 (2 x 2 GB) Maximum Memory 64 GB (4 x 16 GB) Memory Slot 4 x SODIMM DDR4 (For dual- or quad-DIMM configurations, you must use a pair of identical DDR4 modules.) Flash Memory 512MB DOM Drive Compatibility • 3.5-inch SATA hard disk drives, 2.5-inch SATA hard disk drives, 2.5-inch SATA solid state drives M.2 SSD Slot 2 x M.2 2260/2280 SATA 6Gb/s SSDs (Sold separately) Note: 1. The M.2 SSD is not included as standard. 2. M.2 SSD operations can easily generate excessive heat. It is recommended to install a heatsink (from QNAP or a third-party provider) on the M.2 SSD. SSD Cache Acceleration Support • Drive bays 1 to 4 M.2 slots 1 to 2  Optional: M.2 SSD using QNAP QM2 PCIe expansion card Gigabit Ethernet Port 4 x RJ45 PCIe Slot 2 x PCIe 3.0 x4 Note: Support low-profile 10GbE LAN card, USB 3.1 Gen2 (10Gb/s) expansion card, QM2 card, PCIe wireless network card or a bus-powered graphics card. USB Port 4 x USB 3.0 (Front: 1; Back: 3) Audio • 2 x 3.5 mm dynamic microphone jacks • 1 x 3.5 mm line-out jack • 1 x speakers USB One Touch Copy Front: USB 3.0 IR sensor Optional QNAP RM-IR004 remote control (MCE compatible) Form Factor Tower Dimensions (H x W x D) 188.2 x 199.3 x 279.6 mm Net Weight 4.84 kg (10.67 lbs) Power Supply Unit 250W, 100-240V AC, 50/60Hz