The 12-bay RS3621xs+ is capable of delivering over 238K 4K random read IOPS and 5,819 MB/s sequential read throughput1— a true enterprise powerhouse. With full power supply redundancy, an 8-core processor, ECC memory, advanced snapshot technology, and file self-healing, the RS3621xs+ provides a reliable foundation to any data-driven business. CPU Model Intel Xeon D-1541 CPU Quantity 1 CPU Architecture 64-bit CPU Frequency 8-core 2.1 (base) / 2.7 (turbo) GHz Hardware Encryption Engine (AES-NI) System Memory 8 GB DDR4 ECC UDIMM Memory Module Pre-installed 8 GB (8 GB x 1) Maximum Memory Capacity 64 GB (16 GB x 4) Drive Bays 12 Maximum Drive Bays with Expansion Unit 36 (RX1217/RX1217RP x 2) Compatible Drive Type* (See all supported drives) 3.5' SATA HDD 2.5' SATA SSD Maximum Single Volume Size* 200 TB (32 GB memory required)108 TB Hot Swappable Drive RJ-45 1GbE LAN Port 4 RJ-45 10GbE LAN Port 2 USB 3.2 Gen 1 Port* 2 Expansion Port 2 PCIe Expansion 2 x Gen3 x8 slots (x8 link) Form Factor (RU) 2U Power Supply Unit / Adapter 500 W AC Input Power Voltage 100 V to 240 V AC Operating Temperature 0°C to 35°C (32°F to 95°F) 5YR WTY Mention: If NAS use over 8TB HDD, please only chose Synolgy Brand HDD https://www.synology.com/en-global/compatibility