4-bay Value series  Realtek RTD1619B quad-core processor  ,2GB non-ECC DDR4 onboard (non-upgradable), 2 x 1GbE RJ-45 ports ,2 x USB 3.2 ports

Synology 4-Bay Desktop NAS , CPU : Intel Celeron J4025 Dual Core 2.0 GHz , Memory : 2 GB DDR4 (Up to 6GB) , Drive Bay : 4 , LAN Port : 2 x RJ-45 1GbE , USB Port : 2 x USB 3.0

4-bay Plus series model with Intel Celeron J4125 quad-core processor, 2 GB non-ECC DDR4 onboard, expandable up to 6 GB, Built-in 2 x 1GbE RJ-45 LAN ports and 2 x USB 3.2 ports , 2 x M.2 2280 NVMe slots

Synology 4-Bay Desktop NAS , CPU : AMD Ryzen R1600 2-core/4-Thread 2.6Ghz , Memory : 4 GB DDR4 (Up to 32GB) , Drive Bay : 4 (Up to 9) , M.2 Slot : 2 (NVMe) , LAN Port : 2 x RJ-45 1GbE , USB Port : 2 x USB 3.2 Gen 1 , eSATA Port : 1 , PCIe Expansion : 1 x Gen3 x2 network upgrade slot

Synology 5-Bay Desktop NAS , CPU : AMD Ryzen R1600 2-core 2.6 GHz , Memory : 8 GB DDR4 ECC , Drive Bay : 5 (Up to 15) , M.2 Slots : 2 (NVMe) , LAN Port : 4 x RJ-45 1GbE , USB Port : 2 x USB 3.2 Gen 1 , eSATA Port : 2 , eSATA Port : 1 x PCIe Gen3 x2

Synology 6-Bay Desktop NAS , CPU : AMD Ryzen V1500B 4-core 2.2 GHz , Memory : 4 GB DDR4 ECC (Up to 32GB) , Drive Bay : 6 (Up to 16) , M.2 Drive Slots : 2 (NVMe), LAN Port : 4 x 1GbE , USB Port : 3 x USB 3.0 , eSATA Port : 2 , PCIe Expansion : 1 x Gen3 x8 slot 

Synology 8-Bay Desktop NAS , CPU : AMD Ryzen V1500B 4-core 2.2 GHz , Memory : 4 GB DDR4 ECC (Up to 32GB) , Drive Bay : 8 (Up to 18) , M.2 Slot : 2 (NVMe) , LAN Port : 4 x RJ-45 1GbE , USB Port : 4 x USB 3.0 , eSATA Port : 2 , PCIe Expansion : 1 x Gen3 x8 slot

Synology 8-Bay Desktop NAS , CPU : AMD Ryzen V1780B 4-core 3.35 GHz , Memory : 8 GB DDR4 ECC (Up to 32GB) , Drive Bay : 8 (Up to 18) , M.2 Slot : 2 (NVMe) , LAN Port : 2 x RJ-45 1GbE / 1 x RJ-45 10GbE , USB Port : 3 x USB 3.2 Gen 1 , eSATA Port : 2 , PCIe Expansion : 1 x Gen3 x8 slot

Synology 12-Bay Desktop NAS , CPU : AMD Ryzen V1500B 4-core 2.2 GHz , Memory : 4GB DDR4 (Up to 32GB) , Drive Bay : 12 (Up to 24) , LAN Port : 4 x RJ-45 1GbE , USB Port : 2 x USB 3.2 Gen 1 Port , Expansion Port : 1 , PCIe Expansion : 1

Synology 12-Bay Desktop NAS , CPU : Intel Xeon D-1531 6-Core 2.2 GHz , Memory : 16 GB DDR4 ECC (Up to 48GB) , Drive Bay : 12 (Up to 36) , LAN Port : 2 x RJ-45 1GbE , LAN Port : 2 x RJ-45 10GbE , Management LAN Port : 1 , USB Port : 2 x USB 3.2 Gen 1 , Expansion Port : 2 , PCIe Expansion : 1 x Gen3 x8 slot

Synology 4-Bay Rackmount NAS , CPU : AMD Ryzen R1600 2-core 2.6 GHz , Memory : 2 GB DDR4 ECC , Drive Bay : 4 , LAN Port : 2 x RJ-45 1GbE , USB Port : 1 x USB 3.2 Gen 1 , PCIe Expansion : 1 x Gen3 x2 slot

Synology 4-Bay Rackmount NAS , CPU : AMD Ryzen V1500B 4-core 2.2 GHz , Memory : 2 GB DDR4 ECC , Drive Bay : 4 , LAN Port : 4 , USB Port : 2 , eSATA Port : 1 , PCIe Expansion : 1 x Gen3 x8 slot