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Four green DDR5 RDIMM modules with gold contacts and black chips, no heat spreaders

OWC

OWC 128GB (4x32GB) DDR5 4800 CL40 ECC Registered RDIMM HP Cray XD220v XD225v XD295v XD670 memory upgrade

SKU CH-6YXH-KGXJK

128 GB ECC registered DDR5 kit with four 32 GB modules at 4800 MT/s CL40 for HP Cray XD220v, XD225v, XD295v and XD670 servers

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 128GB (4 x 32GB)

  • 128 GB capacity with four 32 GB modules
  • ECC registered design protects data integrity
  • DDR5 4800 speed at CL40 latency
  • 1 V operation reduces power draw
  • Tested for HP Cray XD220v, XD225v, XD295v, XD670

HP Cray server memory kit

This 128 GB kit contains four 32 GB DDR5 registered DIMMs validated for HP Cray XD220v, XD225v, XD295v and XD670 servers. It targets administrators who need ECC registered memory for these specific platforms.

Registered ECC with JEDEC compliance

Each module runs at 4800 MT/s with CL40 latency at 1.1 V in a 2Rx8 layout. The registered buffer and on-die ECC protect data integrity, while JEDEC and RoHS compliance ensure a warranty-safe upgrade.

128 GB capacity for dense workloads

The quad-channel population fills four slots to deliver 128 GB total, supporting virtualisation, database and HPC tasks that benefit from registered ECC headroom. Systems requiring load-reduced DIMMs or unbuffered memory cannot use this kit.

How it compares

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

Price $3,276.99
Pricier than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $25.60 per GB
Pricier than about 70% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D52R8128S
Total capacity128 GB (4 × 32 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
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

5 more in the same range

Questions about this item

Will the registered ECC RDIMM modules need any firmware updates or periodic replacement in the HP Cray XD220v?

The 288-pin DDR5 4800 CL40 2Rx8 1.1V ECC registered DIMMs are JEDEC-standard and ROHS-compliant, designed to meet OEM specs without firmware updates; they are solid-state with no wear-out mechanism, so no scheduled replacement is required.

What is the first limit reached when the 128 GB kit runs sustained workloads in the XD295v?

The CL40 latency at 4800 MT/s and the 2Rx8 registered architecture set the bandwidth and latency ceiling; the memory controller in the XD295v will hit its maximum supported data rate before the modules themselves become the bottleneck.

How much extra heat and power does the 4-module kit add when the XD670 runs all day?

Each 32 GB module operates at 1.1 V with no heat spreader, so the kit draws minimal power and relies on the server's existing airflow; total thermal contribution stays within the platform's standard DIMM cooling envelope.

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