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Green 288-pin DDR4 ECC registered RDIMM module with black chips and gold contacts

OWC

OWC 64GB DDR4 2933MHz ECC Registered RDIMM 2Rx4 CL21 1.2V Kingston KSM29RD4/64HAR server RAM

SKU CH-HTRG-CSWHB

64GB DDR4 2933MHz ECC registered RDIMM for servers, workstations and NAS systems

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • ECC registered design protects data integrity in servers and workstations
  • 64GB capacity at 2933MHz DDR4 expands memory bandwidth for heavy workloads
  • 2Rx4 dual-rank organisation increases density per DIMM slot
  • JEDEC-standard 1.2V operation reduces power draw and heat
  • Backward compatible with 2133MHz, 2400MHz and 2666MHz systems

64GB ECC Registered RDIMM for servers

This 64GB DDR4 2933MHz module is built for workstations, servers and NAS systems that require registered ECC memory. It will not work in standard desktop computers and cannot be mixed with unbuffered DIMMs. The part matches the specifications of Kingston KSM29RD4/64HAR.

Capacity and speed headroom

The single stick provides 64GB at PC4-23400 with CL21 latency and 1.2V operation. It runs at 2933MHz and steps down to 2666MHz, 2400MHz or 2133MHz when the platform demands it. Systems needing more than 64GB per slot or higher frequencies will require different modules.

288-pin registered build

The 288-pin RDIMM uses a 2Rx4 organisation without a heat spreader, keeping the profile low for dense server chassis. Registered signalling reduces electrical load on the memory controller, supporting stability in multi-DIMM configurations. JEDEC and RoHS compliance ensure a warranty-safe upgrade path.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $378.99
Pricier than about 65% of the 6,523 comparable items (median $188.99).
Total capacity 64 GB
Higher than about 70% of the 6,064 comparable items (median 32 GB).
Price per GB $5.92 per GB
Cheaper than about 64% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R464 GB
Total capacity64 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V

Questions about this item

Will this 288-pin DDR4 2933MHz registered ECC module run in a server that currently uses 2400MHz DIMMs?

The module is backward compatible with 2133MHz, 2400MHz and 2666MHz systems, so it will operate at the speed supported by your existing platform.

How can I verify the 64GB module is detected and running with ECC active after installation?

Check the system BIOS or UEFI memory information screen; it should show 64GB capacity, 2933MHz speed, registered ECC status and 1.2V operation.

Does the single 64GB RDIMM ship alone or with any extra components such as a heat spreader?

The module is supplied as a single 288-pin DDR4 RDIMM without a heat spreader; no additional parts are included.

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