SYNOLOGY DiskStation DS425+ 4-BAY NAS

CPU Model

Intel Celeron J4125

CPU Quantity

1

CPU Core

4

CPU Architecture

64-bit

CPU Frequency

2.0 GHz (base) / 2.7 GHz (turbo)

Hardware Encryption Engine

—

System Memory

2 GB DDR4 non-ECC

Total Memory Slots

1

Maximum Memory Capacity

6 GB (2 GB + 4 GB)

Memory Notes

Synology recommends Synology memory only for full support and warranty.

Drive Bays

4

M.2 Drive Slots

2 (NVMe)

Supported Drive Types

3.5" SATA HDD, 2.5" SATA SSD, M.2 2280 NVMe SSD

Hot Swappable Drives

Yes (only for SATA, not for M.2 SSDs)

Drive Compatibility Notes

Use Synology’s compatibility list before purchase.

1GbE LAN Port (RJ-45)

1

2.5GbE LAN Port (RJ-45)

1

USB 3.2 Gen 1 Ports

2

LAN Notes

1GbE LAN ports MTU: 1,500 bytes

Size (H x W x D)

166 mm x 199 mm x 223 mm

Weight

2.18 kg

System Fans

2 × 92 mm

Fan Modes

Full-Speed, Cool, Quiet

LED Brightness Adjustment

Yes

Power Recovery

Yes

Noise Level

21.6 dB(A)

Scheduled Power On/Off

Yes

Wake on LAN/WAN

Yes

Power Adapter

90 watts

AC Input Voltage

100V to 240V AC

Power Frequency

50/60 Hz, Single Phase

Power Consumption (Access)

28.25 watts

Power Consumption (Hibernation)

6.10 watts

BTU (Access)

96.33 BTU/hr

BTU (Hibernation)

20.79 BTU/hr

Power & Noise Notes

Measured with Synology SATA SSDs; tested under controlled conditions

Operating Temperature

0°C to 40°C (32°F to 104°F)

Storage Temperature

-20°C to 60°C (-5°F to 140°F)

Operating Humidity

8% to 80% RH

Storage Humidity

5% to 95% RH

Certifications

FCC, CE, BSMI, VCCI, RCM, UKCA, EAC, CCC, KC, BIS

Environment Compliance

RoHS Compliant

Package Contents

Main Unit ×1, Accessory Pack ×1, AC Adapter ×1, Power Cord ×1, LAN Cable ×2

Optional Accessories

D4NS01-4G, HAT5300 Series, HAT3300 Series, SAT5200 Series, SNV3400/SNV5400

Maximum Single Volume Size