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Silver 2.5 inch SSD with Western Digital Ultrastar DC SN640 label

Western Digital

Western Digital Ultrastar DC SN640 7.68TB PCIe 3.1 NVMe 2.5" internal SSD

SKU CH-W82F-8E2F3

A 7.68 TB 2.5″ internal NVMe SSD delivering up to 3100 MBps read and 1800 MBps write over PCIe 3.1

  • Device TypeInternal Solid State Drive (SSD)
  • Form Factor2.5"
  • Capacity7.68TB
  • InterfacePCI Express 3.1 x4 NVMe
  • Max Sequential ReadUp to 3100 MBps
  • Max Sequential WriteUp to 1800 MBps
  • 68TB capacity stores massive datasets in one drive
  • PCIe 3.1 x4 NVMe interface delivers 3100 MBps sequential read speed
  • 467000 IOPS random read accelerates database and virtualization workloads
  • 1800 MBps sequential write sustains heavy ingest pipelines
  • 5" form factor fits standard enterprise drive bays

Enterprise capacity for data centres

The Western Digital Ultrastar DC SN640 provides 7.68TB of storage in a 2.5 inch form factor. It connects through a PCI Express 3.1 x4 NVMe interface. The drive is built for servers and storage arrays that need high capacity and consistent throughput.

Thermal envelope and power profile

The component operates between 0°C and 70°C under normal workloads. Sequential reads reach up to 3100 MBps while sequential writes reach up to 1800 MBps. Random read performance hits 467000 IOPS and random writes hit 65000 IOPS within this temperature range.

Behaviour under sustained load

The SSD maintains its rated speeds during extended transfers rather than only in short bursts. Steady state random reads stay at 467000 IOPS and writes at 65000 IOPS. The PCIe 3.1 x4 NVMe link keeps latency predictable for database and virtualisation tasks.

Highlights

  • 68TB capacity stores massive datasets in one drive
  • PCIe 3.1 x4 NVMe interface delivers 3100 MBps sequential read speed
  • 467000 IOPS random read accelerates database and virtualization workloads
  • 1800 MBps sequential write sustains heavy ingest pipelines
  • 5" form factor fits standard enterprise drive bays

Specifications

BrandWestern Digital
Part NumberWUS4BB076D7P3E3
Device TypeInternal Solid State Drive (SSD)
Form Factor2.5"
Capacity7.68TB
InterfacePCI Express 3.1 x4 NVMe
Max Sequential ReadUp to 3100 MBps
Max Sequential WriteUp to 1800 MBps
4KB Random ReadUp to 467,000 IOPS
4KB Random WriteUp to 65,000 IOPS
Operating Temperature0°C ~ +70°C

Questions about this item

Will this 2.5" drive fit in a standard 2.5" U.2 hot-swap bay?

The drive uses a 2.5" form factor with a PCIe 3.1 x4 NVMe interface, matching the physical and electrical requirements of U.2 bays designed for NVMe SSDs.

What workloads can the 467000 random read IOPS and 65000 random write IOPS actually handle?

Those figures support heavy read-centric workloads such as database indexing, virtualisation hosts and content-delivery caches where low-latency random access matters most.

Does the 70 °C operating limit require extra cooling in a 1U server?

The drive is rated for 0 °C to 70 °C; in a 1U chassis ensure airflow keeps the drive surface below 70 °C under sustained write loads of up to 1800 MBps.

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