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Four green DDR5 RDIMM modules with gold contacts and black chips

OWC

OWC 512GB (4x128GB) DDR5 4800 CL40 4Rx4 ECC RDIMM memory upgrade

SKU CH-N4PF-XW8GA

512 GB kit of four 128 GB DDR5-4800 ECC registered RDIMMs for HP ProLiant Gen11 servers

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 512GB (4 x 128GB)

  • 512 GB capacity across four 128 GB modules for large workloads
  • DDR5 4800 speed with CL40 latency for responsive server performance
  • ECC registered design detects and corrects data errors automatically
  • 1 V operation reduces power draw in dense configurations
  • Validated for HP ProLiant DL385 Gen11 DL560 Gen11 DX360 Gen11 DX365 Gen11 ML350 Gen11

Server-grade DDR5 ECC kit

This OWC upgrade kit delivers 512GB of DDR5 4800 CL40 registered ECC memory across four 128GB modules. It targets administrators expanding HP ProLiant Gen11 servers such as the DL385, DL560, DX360, DX365 and ML350 where data integrity and maximum capacity matter.

Registered ECC changes system behaviour

Registered buffering and on-die ECC let the memory controller manage heavy loads without signal degradation, while error correction protects workloads from silent data corruption. The kit cannot be mixed with unbuffered or load-reduced DIMMs, so the full configuration must match this specification.

DDR5 4800 sets the ceiling

The JEDEC-standard PC5-38400 interface caps transfer rates at 4800 MT/s and operates at 1.1V, limiting peak bandwidth to that tier regardless of processor capability. Systems requiring higher speeds or lower latencies will need modules rated beyond this baseline.

Highlights

  • 512 GB capacity across four 128 GB modules for large workloads
  • DDR5 4800 speed with CL40 latency for responsive server performance
  • ECC registered design detects and corrects data errors automatically
  • 1 V operation reduces power draw in dense configurations
  • Validated for HP ProLiant DL385 Gen11 DL560 Gen11 DX360 Gen11 DX365 Gen11 ML350 Gen11

Specifications

BrandOWC
Part Number4R8D54R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR5 ECC RDIMM
SpeedDDR5 4800 (PC5 38400)
CAS LatencyCL40
Voltage1.1V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemHP ProLiant DL385 Gen11
HP ProLiant DL560 Gen11
HP ProLiant DX360 Gen11
HP ProLiant DX365 Gen11
HP ProLiant ML350 Gen11

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Questions about this item

Will the 4Rx4 ECC registered DIMMs need any firmware updates or re-seating after installation?

No firmware updates are required. The modules follow JEDEC-standard DDR5 specifications at 1.1 V and are tested to meet OEM specs for the listed HP ProLiant servers.

What limits sustained throughput first on these 128 GB 4Rx4 modules?

The CL40 CAS latency at DDR5 4800 (PC5-38400) sets the timing ceiling for continuous workloads on each 288-pin registered DIMM.

How much heat and power do the four 128 GB sticks draw when the server runs all day?

Each module operates at 1.1 V with no heat spreader; total kit power scales with the four 4Rx4 registered DIMMs under load.

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