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Two green DDR5 RDIMM modules, no heat spreader, 288-pin, ECC registered

OWC

OWC 128GB (2x64GB) DDR5 4800 CL40 ECC Registered RDIMM for HP Cray XD220v XD225v XD295v XD670

SKU CH-Z1BX-0XDJ9

A 128GB DDR5 4800 CL40 ECC registered RDIMM kit for HP Cray XD220v, XD225v, XD295v and XD670 servers

  • Total capacity128 GB (2 × 64 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 128GB (2 x 64GB)

  • 128 GB total capacity for memory-intensive server workloads
  • Two 64 GB registered DIMMs populate dual channels efficiently
  • DDR5 4800 CL40 speed delivers high throughput at 1.1 V
  • ECC registered design corrects errors to protect critical data
  • Validated for HP Cray XD220v, XD225v, XD295v and XD670

OWC 128GB DDR5 ECC RDIMM Kit

This OWC kit delivers 128GB of DDR5 ECC Registered memory as two 64GB modules. It is built for HP Cray XD220v, XD225v, XD295v and XD670 servers that require registered DIMMs with error correction. Standard desktop boards cannot use this memory.

288-pin DDR5 4800 Registered modules

Each module uses the 288-pin DDR5 form factor and runs at 4800 MT/s with CL40 latency at 1.1V. The registered design adds a buffer that reduces electrical load on the server memory controller, allowing higher capacities per channel. It cannot be mixed with unbuffered or load-reduced DIMMs in the same system.

2Rx4 64GB density per DIMM

The dual-rank 2Rx4 organisation provides 64GB on a single stick, letting the supported HP Cray platforms reach 128GB with just two slots. This density suits virtualisation, large databases and memory-heavy HPC workloads. Systems needing more than 128GB per channel or unbuffered memory will require a different module type.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $2,975.99
Pricier than about 73% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (2 × 64 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $23.25 per GB
Pricier than about 68% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R4128P
Total capacity128 GB (2 × 64 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.1 V
Compatibility
Compatible systemsHP Cray XD220v
HP Cray XD225v
HP Cray XD295v
HP Cray XD670

Other versions of this model

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Questions about this item

Does the DDR5 4800 CL40 timing become the bottleneck when the HP Cray XD220v runs sustained workloads?

At DDR5 4800 CL40 the registered ECC modules deliver 38400 MB/s bandwidth; sustained throughput is limited by the memory controller and CPU core count in the XD220v rather than the DIMM timing itself.

How much heat and power do the 2Rx4 registered DIMMs add when the XD225v runs all day?

Each 64 GB module operates at 1.1 V with no heat spreader; total kit power scales with the 128 GB capacity and the server's own airflow handles the thermal load.

What must the HP Cray XD295v already have installed for this 288-pin RDIMM kit to work?

The XD295v must support DDR5 registered ECC memory with 2Rx4 organisation and accept 1.1 V 288-pin RDIMMs in its memory slots.

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