ARM Cortex-A15 quad-core 1.7Ghz,
4GB RAM,
SATA 3, 2x GbE LAN,
3 x USB3.0, HDD hot-swappable

Processor: Intel Celeron J4025 dual-core 2.0GHz (up to 2.9GHz)
System Memory: 2 GB SO-DIMM DDR4 (1 x 2 GB)
Maximum Memory: 8 GB (2 x 4GB)
HDD: Non HDD (4 x 3.5"inch SATA 6Gb/s, 3Gb/s)

ARM Cortex-A15 quad-core 1.7Ghz,
1GB RAM,
SATA 3, 2x GbE LAN,
3 x USB3.0, HDD hot-swappable

Processor: AnnapurnaLabs Alpine AL324 64-bit ARM Cortex-A57 quad-core 1.7GHz processor
System Memory: 2 GB UDIMM DDR4 (1 x 2 GB)
Maximum Memory: 16 GB (1 x 16GB)
HDD: Non HDD (4 x 3.5"inch SATA 6Gb/s, 3Gb/s)