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Green circuit board with black memory chips and gold edge connector

OWC

OWC 128GB DDR5 4800 PC5-38400 CL40 4Rx4 288-pin 1.1V ECC Registered RDIMM memory upgrade

SKU CH-E5SM-F74VV

Adds 128 GB of DDR5 ECC registered memory at 4800 MHz for compatible HP ProLiant Gen11 servers

  • Capacity128GB
  • Type288-Pin DDR5 ECC RDIMM
  • SpeedDDR5 4800 (PC5 38400)
  • CAS LatencyCL40
  • Voltage1.1V
  • ECCYes

Capacity 128GB

  • 128 GB capacity expands server memory headroom for virtualisation workloads
  • DDR5 4800 MT/s speed delivers high bandwidth for data-intensive applications
  • ECC registered design detects and corrects single-bit errors to protect data integrity
  • 1 V operation reduces power draw in dense HP ProLiant Gen11 configurations
  • 4Rx4 288-pin RDIMM form factor fits DL325, DL345, DL360, DL365 and DL380 Gen11 servers

Server-grade DDR5 capacity

This single 128GB DDR5 4800 PC5-38400 CL40 4Rx4 288-pin 1.1V ECC Registered RDIMM is built for HP ProLiant DL325 Gen11, DL345 Gen11, DL360 Gen11, DL365 Gen11 and DL380 Gen11 servers. It replaces HP part numbers P43334-B21, P46972-H21, P50313-B21, P58360-H21, P62605-B21 and P63345-B21. The module will not work in standard desktop computers and cannot be mixed with unbuffered or load-reduced memory.

Sustained error-correcting throughput

Registered buffering and on-die ECC keep data integrity intact during continuous workloads across virtualisation, database and compute tasks. The 4800 MT/s JEDEC speed and CL40 latency deliver stable bandwidth without relying on overclocking headroom. Single-rank-per-channel limits do not apply because the 4Rx4 organisation presents four logical ranks per module.

Dense registered module without spreader

The 288-pin RDIMM fits the standard DDR5 server slot and draws 1.1V, matching the platform power budget. No heat spreader is fitted, so airflow across the PCB depends on the chassis fan wall. Builders who need a second DIMM per channel must verify the motherboard slot population rules for 4Rx4 modules. Buyers requiring unbuffered or load-reduced memory should look elsewhere.

Highlights

  • 128 GB capacity expands server memory headroom for virtualisation workloads
  • DDR5 4800 MT/s speed delivers high bandwidth for data-intensive applications
  • ECC registered design detects and corrects single-bit errors to protect data integrity
  • 1 V operation reduces power draw in dense HP ProLiant Gen11 configurations
  • 4Rx4 288-pin RDIMM form factor fits DL325, DL345, DL360, DL365 and DL380 Gen11 servers

Specifications

BrandOWC
Part Number4R8D54R4128G
Capacity128GB
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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Questions about this item

How much power does the 1.1V DDR5 module draw during continuous all-day operation?

The module runs at 1.1 volts, the standard DDR5 voltage for registered server DIMMs, which helps limit heat output inside a fully populated ProLiant chassis.

What server platform must I already own for this 288-pin ECC RDIMM to work?

It is validated for HP ProLiant DL325 Gen11, DL345 Gen11, DL360 Gen11, DL365 Gen11 and DL380 Gen11 systems and replaces HP part numbers P43334-B21, P46972-H21, P50313-B21, P58360-H21, P62605-B21 and P63345-B21.

Can I mix this 4Rx4 registered DIMM with the unbuffered or load-reduced modules already in my older ProLiant?

No, the module is ECC registered 4Rx4 and must not be mixed with unbuffered or ECC load-reduced memory; all slots should use the same registered type for stable operation.

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