SYNOLOGY DS425+ 4BAY/INTEL/2.0GHZ-QC/2GB/1X2.5GLAN/2NVMe

 
Synology DiskStation DS425+
 is a 4-bay Network Attached Storage (NAS) device designed for small and medium-sized businesses and IT enthusiasts. It is powered by an Intel Celeron J4125 processor and features both 1 GbE and 2.5 GbE networking, along with two M.2 NVMe SSD slots for caching. 
Processor and memory

• CPU: The 
  DS425+
   uses an Intel Celeron J4125 64-bit quad-core processor with a base frequency of 2.0 GHz and a burst frequency of up to 2.7 GHz. It includes a hardware encryption engine (AES-NI) for secure data transmission.
• System memory: It comes with 2 GB of DDR4 non-ECC SODIMM RAM soldered on the board, and has one additional slot for expansion. The maximum memory capacity is 6 GB (2 GB onboard + a 4 GB module). Synology recommends using only its own branded memory for stability and full warranty support. 

• Drive bays: The NAS has 4 bays that are hot-swappable and support 3.5" SATA HDDs and 2.5" SATA SSDs.
• M.2 NVMe slots: It includes 2 M.2 NVMe SSD slots (M.2 2280) for creating a high-speed SSD cache to accelerate performance. The M.2 slots are not hot-swappable.
• Supported drive types:
  • 3.5" SATA HDD
  • 2.5" SATA SSD
  • M.2 2280 NVMe SSD
• Supported RAID types: Basic, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, and Synology Hybrid RAID (SHR). 

• LAN ports:
  • 1 x 2.5 GbE RJ-45 port
  • 1 x 1 GbE RJ-45 port
• USB ports: 2 x USB 3.2 Gen 1 ports.
• Networking features: Supports link aggregation and failover (though Link Aggregation is noted as "No" on some spec sheets; please verify with a reliable source), Wake on LAN/WAN, and iSCSI. 

• Dimensions (H x W x D): 166 x 199 x 223 mm (6.54 x 7.83 x 8.78 in).
• Weight: 2.18 kg (4.81 lb).
• Fans: 2 x 92mm fans with multiple speed modes.
• Noise level: 21.6 dB(A) (when idle).
• Power consumption: 28.25 W (Access) and 6.10 W (HDD Hibernation).