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Green circuit board with gold edge connector and black memory chips

OWC

OWC 16GB DDR4 2933MHz ECC Registered RDIMM 2Rx8 CL21 1.2V 288-pin Dell PowerEdge R840 R940 R940xa T640

SKU CH-59GM-VDHWB

16 GB DDR4-2933 ECC registered RDIMM for Dell PowerEdge R840, R940, R940xa and T640 servers

  • Total capacity16 GB
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 16GB

  • 16GB DDR4 2933MHz ECC Registered RDIMM for Dell PowerEdge servers
  • CL21 CAS latency at 1.2V for stable registered operation
  • 2Rx8 dual-rank organisation maximises capacity per slot
  • Backward compatible with 2133MHz 2400MHz 2666MHz systems
  • Replaces Dell part numbers AA579532 AA601617 AB003152 and others

Server ECC RDIMM for Dell PowerEdge

This 16 GB DDR4 ECC registered DIMM runs at 2933 MHz with CL21 latency and 1.2 V operation. It is built for Dell PowerEdge R840, R940, R940xa and T640 servers and workstations that require registered memory with error correction. The module uses a 2Rx8 organisation and a standard 288-pin form factor.

Verify registered ECC support and slot count

Confirm that your system accepts DDR4 ECC registered RDIMMs and cannot use unbuffered or non-ECC modules. The motherboard must support 2933 MHz operation or automatically down-clock to 2133, 2400 or 2666 MHz. Check the maximum memory capacity per socket and the total number of available DIMM slots before ordering.

Suits IT teams upgrading listed PowerEdge models

Ideal for administrators extending the life of R840, R940, R940xa or T640 platforms with validated OWC memory. Not suitable for standard desktop PCs, consumer laptops or any system that requires unbuffered non-ECC DDR4. Buyers needing larger single-module capacities or different rank configurations should look elsewhere.

How it compares

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

Price $114.99
Cheaper than about 66% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $7.19 per GB
Cheaper than about 56% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R9D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell PowerEdge R840
Dell PowerEdge R940
Dell PowerEdge R940xa
Dell PowerEdge T640

Other versions of this model

5 more in the same range

Questions about this item

Does the 16GB DDR4 2933MHz ECC Registered RDIMM ship alone or with any accessories?

The module ships by itself; no heat spreader, cables, tools or additional components are included in the box.

Should I choose the 16GB 2Rx8 CL21 stick or look for a different capacity for my Dell PowerEdge R840?

This 16GB 2Rx8 CL21 module matches the Dell part numbers AA579532, AA601617, AB003152, SNPTFYHPC/16G, SNPTFYHPC/16VXR and TFYHP, so select it when you need that exact capacity and rank configuration.

Will the PC4-23400 2933MHz rating actually run at 2933MHz in a PowerEdge T640, or does it drop to a lower speed?

The DIMM is rated for 2933MHz CL21 at 1.2V and is backward compatible with 2133MHz, 2400MHz and 2666MHz; the server's memory controller and BIOS determine the final operating speed.

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