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Green M.2 2280 circuit board with gold edge connector and black controller chips

Synology Inc.

Synology Inc. SNV5420-800G M.2 2280 800GB PCI-Express 3.0 x4 enterprise SSD

SKU CH-524A-80HQW

M.2 2280 enterprise SSD with 800GB capacity, PCI-Express 3.0 x4 interface, up to 3000 MBps sequential read and 1400 TBW endurance

  • Total capacity800 GB
  • Sequential read speedUp to 3,000 MB/s
  • Sequential write speedUp to 1,000 MB/s
  • Interface typePCI-Express 3.0 x4
  • Form factorM.2 2280
  • Random read (4K)Up to 400,000 IOPS
  • Fast sequential reads up to 3000 MBps via PCIe 3.0 x4
  • Sustained 4K random reads up to 660000 IOPS for caching workloads
  • Enterprise endurance rated at 1400 TBW with 3000000 hour MTBF
  • Low idle power of 2.5 W and active draw of 5.0 W read
  • Built for Synology systems with validated interoperability and DSM firmware updates

Synology SNV5420 800GB enterprise M.2 SSD

The Synology SNV5420-800G is an 800GB M.2 2280 enterprise solid-state drive that connects through a PCI-Express 3.0 x4 interface. It is designed for Synology NAS and server platforms that require high sustained random performance and validated firmware integration.

Upgrading from lower-endurance cache drives

This drive replaces consumer or entry-level SSDs that cannot sustain heavy write workloads. The jump is worth it when caching layers demand up to 2,900TBW endurance and consistent 4K random performance of up to 660,000 read and 120,000 write IOPS.

Straightforward M.2 installation

Installation follows the standard M.2 2280 slot procedure with a single screw. The main issues arise when the system lacks PCIe 3.0 x4 electrical wiring or runs firmware that has not been validated through Synology DSM automatic updates.

How it compares

Measured against everything we stock in Server & Data Center SSDs, at today’s prices. Recalculated every night.

Price $660.99
Cheaper than about 62% of the 1,039 comparable items (median $992.99).
Total capacity 800 GB
Lower than about 80% of the 522 comparable items (median 3.2 TB).
Sequential read speed Up to 3,000 MB/s
Lower than about 59% of the 311 comparable items (median 6,500 MB/s).
Price per TB $826.24 per TB
Pricier than about 72% of the 522 comparable items (median $595.64 per TB).

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Specifications

Product
Brand nameSynology
Model nameSNV5420-800G
Total capacity800 GB
Performance
Sequential read speedUp to 3,000 MB/s
Sequential write speedUp to 1,000 MB/s
Random read (4K)Up to 400,000 IOPS
Random write (4K)Up to 70,000 IOPS
Storage
Write endurance1400 TB
Ports & slots
Interface typePCI-Express 3.0 x4
Power
Idle power draw2.5 W
Active power draw5.0 W read (Typ.), 5.5 W write (Typ.)
Size & build
Form factorM.2 2280
Overall height3.5 mm
Product depth22 mm
Product weight80 mm
Environment & compliance
Operating temperature range0 °C to 85 °C (32 °F to 185 °F)
Storage temperature range-40 °C to 85 °C (-40 °F to 185 °F)
More details
Mean time between failures3,000,000 h

Questions about this item

Will the M.2 2280 80mm length fit my motherboard slot?

The drive uses the standard M.2 2280 form factor measuring 22mm wide by 80mm long, so it fits any motherboard or server with an M.2 2280 keyed slot.

Do I need to install a heatsink before slotting the PCIe 3.0 x4 drive into my Synology NAS?

The drive is 3.50mm high and draws up to 5.5W during write operations; most Synology NAS bays include integrated thermal pads, but verify your specific model's clearance before adding a third-party heatsink.

When should I plan to replace the drive based on the 1400TB written endurance rating?

With 1400TB total bytes written and 3,000,000 hours MTBF, replacement timing depends on your workload; monitor lifetime wear analytics in DSM to track remaining endurance and receive notifications before the drive reaches its limit.

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