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Four green DDR5 RDIMM sticks, bare chips, no heat spreader

OWC

OWC 512GB (4x128GB) DDR5 4800 PC5-38400 CL40 4Rx4 288-pin 1.1V ECC Registered RDIMM memory upgrade

SKU CH-RKA5-3WXZ0

A 512GB registered ECC DDR5 kit with four 128GB modules at 4800MHz CL40 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)

  • 512GB total capacity from four 128GB modules
  • DDR5 4800 speed rated at PC5-38400
  • ECC registered design for server data integrity
  • CL40 latency at 1.1V operating voltage
  • Compatible with HP ProLiant Gen11 DL325 DL345 DL360 DL365 DL380

Server memory kit

This OWC kit supplies 512GB of DDR5 ECC registered memory across four 128GB modules. It is built for HP ProLiant DL325 Gen11, DL345 Gen11, DL360 Gen11, DL365 Gen11 and DL380 Gen11 servers that require registered DIMMs with error correction.

Registered ECC difference

The registered buffer and on-die ECC let the memory controller manage heavy loads without signal degradation. Standard desktop boards cannot use these modules, and they must not be mixed with unbuffered or load-reduced DIMMs in the same system.

288-pin DDR5 form factor

Each module fits the 288-pin DDR5 slot at 1.1V with CL40 timing and 4Rx4 organisation. No heat spreader is included, so airflow in the server chassis handles cooling. The kit is validated for the listed ProLiant Gen11 platforms only.

Privalumai

  • 512GB total capacity from four 128GB modules
  • DDR5 4800 speed rated at PC5-38400
  • ECC registered design for server data integrity
  • CL40 latency at 1.1V operating voltage
  • Compatible with HP ProLiant Gen11 DL325 DL345 DL360 DL365 DL380

Specifikacijos

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 DL325 Gen11
HP ProLiant DL345 Gen11
HP ProLiant DL360 Gen11
HP ProLiant DL365 Gen11
HP ProLiant DL380 Gen11

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Will the 128 GB DDR5 4800 CL40 RDIMMs need any firmware or thermal-pad service later?

The modules have no heat spreader and run at 1.1 V, so no thermal-pad replacement is expected; firmware updates are handled by the server BIOS, not the DIMMs themselves.

What limit appears first when the 4Rx4 registered DIMMs run at full 4800 MT/s continuously?

The 4Rx4 organisation and CL40 latency set the electrical loading and timing ceiling; sustained throughput is bounded by the registered buffer and rank density rather than thermals.

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

Each stick operates at 1.1 V with no heat spreader, so total power draw scales with the 512 GB capacity and the registered buffer, producing modest heat that the server’s existing airflow handles.

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