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Two green DDR5 ECC RDIMM modules, 288-pin, no heat spreader

OWC

OWC 256GB (2x128GB) DDR5 4800 CL40 4Rx4 1.1V ECC RDIMM Kit memory upgrade

SKU CH-P17F-FYM0S

256 GB DDR5-4800 ECC registered RDIMM kit, two 128 GB modules at CL40 and 1.1 V for HP ProLiant DL320 Gen11, DL380a Gen11 and DX320 Gen11 servers

  • Total capacity256 GB (2 × 128 GB)
  • Rated speedDDR5 4800 (PC5 38400)
  • CAS latencyCL40
  • Rated voltage1.1 V
  • Buffer typeRegistered
  • Memory rank4Rx4

Capacity 256GB (2 x 128GB)

  • 256GB total capacity from two 128GB modules
  • DDR5 4800 speed with CL40 latency for server workloads
  • ECC registered design protects data integrity in critical systems
  • 1V operation reduces power draw in dense configurations
  • Validated for HP ProLiant DL320 Gen11 DL380a Gen11 DX320 Gen11

Server memory upgrade

This OWC kit supplies 256GB of DDR5 ECC registered memory in two 128GB modules for HP ProLiant DL320 Gen11, DL380a Gen11 and DX320 Gen11 servers. It targets administrators who need maximum capacity per slot for virtualisation, databases or large in-memory workloads. The modules run at 4800 MT/s with CL40 latency at the standard 1.1V JEDEC voltage.

Build and compatibility

Each 288-pin RDIMM uses a 4Rx4 organisation and has no heat spreader, so it fits the standard DIMM sockets in the listed ProLiant chassis without clearance issues. ECC and register circuitry provide the error correction and signal integrity required by those platforms, and the kit is validated against the vendor memory-qualified list. Mixing with unbuffered or load-reduced DIMMs is not supported.

Capacity step up

The kit replaces smaller DDR5 RDIMM sets or fills empty slots to reach the 256GB total in a two-module configuration. The upgrade makes sense when current memory limits the number of virtual machines, container density or database buffer size the server can handle. Buyers who need more than two modules per channel or a different rank layout should verify the platform’s population rules before ordering.

How it compares

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

Price $7,197.99
Pricier than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (2 × 128 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $28.12 per GB
Pricier than about 79% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number4R8D54R4256P
Total capacity256 GB (2 × 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 ProLiant DL320 Gen11
HP ProLiant DL380a Gen11
HP ProLiant DX320 Gen11

Other versions of this model

5 more in the same range

Questions about this item

What speed does the DDR5 4800 kit actually run at in the HP ProLiant DL380a Gen11?

The kit operates at DDR5 4800 (PC5-38400) with CL40 latency at 1.1V, matching the JEDEC standard for these servers.

Will the 288-pin ECC registered DIMMs fit the memory slots in the HP ProLiant DX320 Gen11?

Yes, each 128GB module uses the standard 288-pin DDR5 RDIMM form factor required by the DL320 Gen11, DL380a Gen11 and DX320 Gen11.

Do I need to install the two 128GB modules as a matched pair in specific channels?

Install one module per channel in the same bank; the 4Rx4 registered DIMMs must be paired identically to maintain ECC integrity.

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