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Four green DDR5 RDIMM modules in anti-static tray

OWC

OWC 512GB (4x128GB) DDR5 4800 CL40 ECC Registered RDIMM Memory Upgrade Kit

SKU CH-7JYT-5JK0Y

A 512GB kit of four 128GB DDR5 4800 CL40 ECC registered RDIMMs for HP Cray XD220v, XD225v, XD295v and XD670 servers

  • Total capacity512 GB (4 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 512GB (4 x 128GB)

  • ECC registered design prevents data corruption in critical workloads
  • 512 GB total capacity across four 128 GB modules
  • DDR5 4800 speed with CL40 latency for high-throughput server tasks
  • 1 V operation reduces power draw in dense configurations
  • Validated for HP Cray XD220v, XD225v, XD295v and XD670 systems

512GB DDR5 ECC RDIMM kit

This OWC kit provides 512GB of DDR5 4800 memory across four 128GB registered DIMMs. It is built for HP Cray XD220v, XD225v, XD295v and XD670 servers that require ECC registered modules.

For HP Cray server upgrades only

The modules suit administrators expanding memory in the listed Cray XD systems. They will not work in standard desktops, workstations that take unbuffered DIMMs, or platforms that require load-reduced memory.

Sustained server operation

Registered ECC architecture maintains data integrity during continuous workloads. JEDEC-standard 1.1V operation keeps power draw consistent across all four modules under prolonged load.

How it compares

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

Price $13,948.99
Pricier than about 90% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (4 × 128 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $27.24 per GB
Pricier than about 76% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D54R4512S
Total capacity512 GB (4 × 128 GB)
Product type288-Pin DDR5 ECC RDIMM
Performance
Rated speedDDR5 4800 (PC5 38400)
Memory
CAS latencyCL40
ECC supportYes
Buffer typeRegistered
Memory rank4Rx4
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

What server models must I already have to install this 512GB DDR5 4800 CL40 ECC Registered RDIMM kit?

This kit is validated for HP Cray XD220v, XD225v, XD295v and XD670 servers. It requires a system that accepts 288-pin DDR5 ECC Registered DIMMs at 1.1V.

How do these 4Rx4 registered modules behave alongside any remaining 2Rx4 or 2Rx8 DIMMs in the same HP Cray server?

The 4Rx4 registered modules must not be mixed with unbuffered or load-reduced ECC DIMMs. Within the same channel, identical rank and organisation are required for stable operation.

How can I confirm the kit is running at DDR5 4800 CL40 with ECC active after installation?

Check the system BIOS or UEFI memory information screen: it should report 512GB total, 4800 MT/s, CL40 timings and ECC Registered status for each of the four 128GB modules.

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