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Green rectangular DDR4 memory module with gold edge connector and black chips, no heat spreader

OWC

OWC 64GB DDR4 2933MHz CL21 ECC Registered RDIMM memory upgrade

SKU CH-RY46-33DBA

64GB DDR4 2933MHz ECC registered RDIMM for Dell PowerEdge R550, R640, R740, R740XD and R740XD2 servers

  • Total capacity64 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 64GB

  • 64GB capacity lets you run larger workloads on supported Dell PowerEdge servers
  • ECC registered design detects and corrects data errors for server-grade reliability
  • DDR4 2933MHz CL21 at 1.2V delivers rated speed with standard voltage
  • 288-pin RDIMM form factor fits R550, R640, R740, R740XD and R740XD2 systems
  • Backward compatible with 2133MHz, 2400MHz and 2666MHz platforms for flexible deployment

Server ECC RDIMM upgrade

This 64GB DDR4 module targets Dell PowerEdge R550, R640, R740, R740XD and R740XD2 servers needing registered ECC memory. It replaces Dell part numbers AA579530, AA601615, AB003154, SNPW403YC/64G, SNPW403YC/64VXR and W403Y. The module is not compatible with standard desktop computers or unbuffered memory configurations.

64GB capacity at 2933MHz

The single DIMM delivers 64GB running at PC4-23400 with CL21 latency and 1.2V operation. It is backward compatible with 2133MHz, 2400MHz and 2666MHz bus speeds. Systems requiring more than 64GB per slot or unregistered memory cannot use this module.

288-pin registered build

The 2Rx4 registered design uses a 288-pin interface without a heat spreader. JEDEC and RoHS compliance ensure correct electrical signalling in server and workstation boards. Builders needing unbuffered DIMMs or a different pin count must choose another product.

How it compares

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

Price $416.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 64 GB
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $6.52 per GB
Cheaper than about 60% of the 20,941 comparable items (median $8.19 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
Compatibility
Compatible systemsDell PowerEdge R550
Dell PowerEdge R640
Dell PowerEdge R740
Dell PowerEdge R740XD
Dell PowerEdge R740XD2

Other versions of this model

5 more in the same range

Questions about this item

Will this 2933MHz module run reliably alongside my existing 2133MHz DDR4 ECC RDIMMs in a PowerEdge R740?

Yes, the module is backward compatible with 2133MHz, 2400MHz and 2666MHz speeds, so it will operate at the speed of the slowest installed DIMM.

How can I verify the 64GB ECC registered DIMM is detected and error-correcting after installation?

Check the system BIOS or iDRAC memory inventory; it should show 64GB per module, 2933MHz speed, ECC Registered status and CL21 timings.

Does the single 288-pin RDIMM ship with a heat spreader or any installation tools?

The module has no heat spreader and no tools are included; only the DIMM itself is in the box.

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