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Four green rectangular DDR4 ECC registered RDIMM modules side by side

OWC

OWC 256GB (4x64GB) DDR4 2933 ECC Registered RDIMM memory upgrade for HP SimpliVity 325 Gen10

SKU CH-M19P-R4H3K

A 256 GB kit of four 64 GB DDR4 2933 ECC registered RDIMMs for HP SimpliVity 325 Gen10 servers

  • Capacity256GB (4 x 64GB)
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity from four 64 GB modules
  • DDR4 2933 MHz speed with CL21 latency
  • ECC registered RDIMM for data integrity in servers
  • 2 V low-voltage operation reduces power draw
  • Backward compatible with 2133, 2400 and 2666 MHz systems

System-specific server upgrade

This OWC kit supplies 256 GB of DDR4 ECC registered memory in four 64 GB modules. It is built for the HP SimpliVity 325 Gen10 and is intended for administrators expanding capacity in that platform.

Verify registered ECC requirement

The modules are registered ECC RDIMMs and will not work in systems that require unbuffered or load-reduced DIMMs. Confirm the SimpliVity 325 Gen10 accepts registered memory and that all four slots can be populated with 2Rx4 parts before ordering.

Standard 288-pin RDIMM form factor

Each stick uses the 288-pin DDR4 registered layout without a heat spreader, running at 1.2 V. The design fits the server’s DIMM slots directly and operates within JEDEC electrical limits for daily enterprise workloads.

Highlights

  • 256 GB total capacity from four 64 GB modules
  • DDR4 2933 MHz speed with CL21 latency
  • ECC registered RDIMM for data integrity in servers
  • 2 V low-voltage operation reduces power draw
  • Backward compatible with 2133, 2400 and 2666 MHz systems

Specifications

BrandOWC
Part Number2R9D42R4256S
Capacity256GB (4 x 64GB)
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemHP SimpliVity 325 Gen10

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Questions about this item

What does the 256GB kit include and is anything else required?

The kit contains four 64GB DDR4 2933 ECC Registered RDIMM modules (part 2R9D42R4256S). No additional components are needed for installation in a compatible HP SimpliVity 325 Gen10 server.

Why choose the 256GB (4x64GB) CL21 2Rx4 version over other capacities?

This configuration provides 256GB total using four dual-rank 64GB modules at CL21 latency, matching the HP part numbers P19045-K21, P00930-H21, P14636-001 and others listed for the SimpliVity 325 Gen10.

What does the 2933MHz rating mean once installed in the SimpliVity 325 Gen10?

The modules run at DDR4 2933 (PC4-23400) with CL21 timing at 1.2V. They are backward compatible with 2133MHz, 2400MHz and 2666MHz bus speeds if the system requires a lower frequency.

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