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Eight green DDR5 RDIMM modules in a row

OWC

OWC 1TB (8x128GB) DDR5 4800 PC5-38400 CL40 4Rx4 288-pin 1.1V ECC Registered RDIMM memory upgrade

SKU CH-3D1D-5J30E

Eight 128 GB DDR5 ECC registered RDIMMs at 4800 MHz CL40, 1.1 V, for HP Cray XD220v, XD225v, XD295v and XD670 servers

  • Capacity1TB (8 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 1TB (8 x 128GB)

  • 1TB total capacity from eight 128GB modules
  • DDR5 4800 speed with CL40 latency
  • ECC registered design corrects data errors
  • 1V operation reduces server power draw
  • Validated for HP Cray XD220v XD225v XD295v XD670

High-density DDR5 kit for HP Cray servers

This kit provides 1TB of DDR5 4800 memory across eight 128GB registered ECC RDIMMs. It targets the HP Cray XD220v, XD225v, XD295v and XD670 platforms that require registered modules. Standard desktop systems cannot use this memory type. Buyers needing unbuffered or load-reduced DIMMs should look elsewhere.

Installing registered ECC RDIMMs in supported Cray

Modules install into 288-pin DDR5 slots like any RDIMM, but the platform must support registered ECC at 1.1V. Mixing with unbuffered or load-reduced memory will prevent boot. Verify the server firmware revision matches the vendor qualified vendor list before installation. No heat spreader is fitted, so airflow across the DIMM rows must follow the chassis design.

Sustained throughput in multi-rank server workloads

Eight 4Rx4 modules at CL40 deliver consistent bandwidth under continuous ECC-corrected traffic typical of database and virtualization hosts. The JEDEC-standard PC5-38400 rating ensures timing stability during extended runs. Registered buffering reduces electrical load on the memory controller, helping maintain signal integrity at full population. Performance scales with the memory controller capabilities of the specific Cray model.

Puntos fuertes

  • 1TB total capacity from eight 128GB modules
  • DDR5 4800 speed with CL40 latency
  • ECC registered design corrects data errors
  • 1V operation reduces server power draw
  • Validated for HP Cray XD220v XD225v XD295v XD670

Especificaciones

BrandOWC
Part Number4R8D54R41TBK
Capacity1TB (8 x 128GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemHP Cray XD220v
HP Cray XD225v
HP Cray XD295v
HP Cray XD670

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Preguntas sobre este artículo

How can I verify the kit is running at the rated DDR5 4800 speed after installation?

Check the system BIOS or UEFI memory information screen; it should show each module operating at 4800 MT/s with CL40 latency and 1.1 V.

What does the 1 TB kit contain and is anything else required?

The kit includes eight 128 GB 288-pin ECC Registered RDIMMs; no additional parts are needed for the listed HP Cray servers.

Which capacity version should I choose for an HP Cray XD220v?

This 1 TB (8 × 128 GB) kit is the specific configuration validated for the XD220v, XD225v, XD295v and XD670 models.

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