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Four green DDR4 RDIMM modules with gold contacts and black chips

OWC

OWC 256GB (4x64GB) DDR4 3200 CL22 2Rx4 ECC Registered RDIMM memory upgrade

SKU CH-ZKH9-M88TW

A 256GB kit of four 64GB DDR4 3200 CL22 ECC registered RDIMMs for HP SimpliVity 380 Gen10 servers

  • Total capacity256 GB (4 × 64 GB)
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 256GB (4 x 64GB)

  • 256 GB total capacity from four 64 GB modules
  • DDR4 3200 speed with CL22 latency for server workloads
  • ECC registered design detects and corrects data errors
  • 2 V operation lowers power draw in HP SimpliVity 380 Gen10
  • Replaces HP part numbers including P43170-B21 and P06035-B21

Server ECC RDIMM Kit

This OWC kit supplies 256GB of DDR4 3200 CL22 ECC Registered memory in four 64GB 2Rx4 modules. It is built for the HP SimpliVity 380 Gen10 server platform where registered DIMMs are required. Workstations and servers that need error-correcting, buffered memory at 1.2V are the target systems.

Verify Registered DIMM Slots

Confirm the host has 288-pin DDR4 slots that accept Registered ECC modules and that the firmware supports 64GB 2Rx4 density. This memory cannot be mixed with unbuffered or load-reduced DIMMs. All four modules should be installed together to match capacity, speed and rank across channels.

Green PCB With No Spreader

The modules use a bare green PCB without a heat spreader, so they fit tight server DIMM cages where clearance is limited. Gold-edge 288-pin connectors seat directly into the motherboard slots. Registered buffering adds electrical load on the memory controller, which the SimpliVity 380 Gen10 is designed to handle.

How it compares

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

Price $1,549.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 256 GB (4 × 64 GB)
Higher than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $6.05 per GB
Cheaper than about 65% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number3R2D42R4256S
Total capacity256 GB (4 × 64 GB)
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsHP SimpliVity 380 Gen10

Other versions of this model

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Questions about this item

Does the 256GB kit ship as four 64GB modules or must I buy extra sticks?

The kit includes four 64GB DDR4 3200 CL22 2Rx4 ECC Registered RDIMMs for a total of 256GB, nothing else is required.

Should I choose the 2Rx4 registered version or a different rank for the HP SimpliVity 380 Gen10?

This 2Rx4 ECC Registered DDR4 3200 kit matches the HP part numbers P43170-B21 and P06035-B21 and cannot be mixed with unbuffered or load-reduced memory.

What does the 3200 PC4-25600 rating deliver in the SimpliVity 380 Gen10?

It provides DDR4 3200 MT/s bandwidth at 1.2V with CL22 latency and ECC error correction for registered server workloads.

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