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Green rectangular DDR4 server memory module with gold contacts and black chips, no heat spreader

OWC

OWC 2R9D42R464GB 64GB DDR4 2933MHz ECC Registered RDIMM 2Rx4 1.2V server RAM

SKU CH-VN14-334Q0

64 GB DDR4 2933 MHz ECC registered RDIMM for servers, workstations and NAS, CL21 1.2 V with backward compatibility to 2133, 2400 and 2666 MHz

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • ECC protection guards data integrity in servers
  • Registered design stabilises heavy multi-module loads
  • 2933 MHz DDR4 speed matches PC4-23400 spec
  • 64 GB capacity expands memory headroom
  • 2 V operation reduces power draw

Server ECC RDIMM for workstations and NAS

This 64GB DDR4 module is built for servers, workstations and NAS systems that require registered ECC memory. It operates at 1.2V with a CL21 latency and a 2Rx4 rank configuration. Standard desktop computers cannot use this module and it must not be mixed with unbuffered memory.

Registered ECC with 288-pin DDR4 interface

The single specification that determines compatibility is the registered ECC design on a 288-pin DDR4 form factor. Only platforms that explicitly support registered ECC RDIMMs will accept this module. Systems requiring unbuffered or non-ECC memory are not compatible.

64GB capacity with 2933MHz speed headroom

The module delivers 64GB at 2933MHz (PC4-23400) and is backward compatible with 2666MHz, 2400MHz and 2133MHz bus speeds. It comfortably handles high-density virtualisation and large dataset workloads, while capacity limits appear when applications demand more than 64GB per slot.

How it compares

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

Price $421.99
Pricier than about 67% 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 $6.59 per GB
Cheaper than about 58% 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

What does the 2933MHz rating mean once the module is installed in a server?

The module runs at 2933MHz with CL21 latency, delivering the JEDEC-standard PC4-23400 data rate when the platform drives it at its rated frequency.

How does the DDR4 ECC Registered interface affect usable speed in a server?

As a 288-pin DDR4 ECC Registered DIMM it operates at 1.2V and the registered buffer adds one clock cycle; the platform can clock it down to 2666, 2400 or 2133MHz if required.

What physical slot and clearance does this 64GB RDIMM need?

It requires a standard 288-pin DDR4 DIMM socket; the module has no heat spreader so it fits in tight server chassis without extra height clearance.

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