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Eight green DDR4 LRDIMM modules in a row

OWC

OWC 1TB (8x128GB) DDR4 2933 CL21 ECC LRDIMM 288-pin 1.2V memory upgrade

SKU CH-DY9A-46849

Eight 128 GB DDR4 2933 ECC LRDIMM modules add 1 TB to Dell PowerEdge FC640, M640, MX740c, MX840c and R640 servers

  • Total capacity1 TB (8 × 128 GB)
  • Rated speedDDR4 2933 (PC4 23400)
  • CAS latencyCL21
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Memory rank8Rx4

Capacity 1TB (8 x 128GB)

  • 1TB total capacity with eight 128GB modules
  • ECC load-reduced design for server data integrity
  • DDR4 2933MHz CL21 speed for responsive performance
  • 2V operation reduces power draw in dense configs
  • Validated for Dell PowerEdge FC640 M640 MX740c MX840c R640

Server memory upgrade kit

This OWC kit supplies 1TB of DDR4 memory across eight 128GB LRDIMM modules. Each module runs at 2933MHz with CL21 latency and operates at 1.2V. The kit targets administrators upgrading compatible Dell PowerEdge servers.

ECC load-reduced integration

These 288-pin modules use ECC load-reduced technology and cannot be mixed with unbuffered or registered ECC memory. Backward compatibility covers 2133MHz, 2400MHz and 2666MHz bus speeds. The kit fits Dell PowerEdge FC640, M640, MX740c, MX840c and R640 systems.

Suited for high-density server deployments

Organisations expanding virtualisation or database capacity in the listed Dell platforms will benefit. Buyers needing memory for standard desktop PCs or workstations that accept only unbuffered or registered DIMMs should look elsewhere.

How it compares

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

Price $5,039.99
Pricier than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 1 TB (8 × 128 GB)
Higher than about 93% of the 20,941 comparable items (median 32 GB).
Price per GB $5.04 per GB
Cheaper than about 76% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2L9D48R41TBK
Total capacity1 TB (8 × 128 GB)
Product type288-Pin DDR4 ECC LRDIMM
Performance
Rated speedDDR4 2933 (PC4 23400)
Memory
CAS latencyCL21
ECC supportYes
Buffer typeLoad Reduced
Memory rank8Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell PowerEdge FC640
Dell PowerEdge M640
Dell PowerEdge MX740c
Dell PowerEdge MX840c
Dell PowerEdge R640

Other versions of this model

5 more in the same range

Questions about this item

Will the 8Rx4 organization limit how many 128GB modules I can populate per channel?

Each module is an 8Rx4 load-reduced DIMM; the Dell PowerEdge FC640, M640, MX740c, MX840c and R640 memory subsystems determine the maximum ranks per channel, so consult the server's technical guide for the exact population ceiling.

What thermal headroom should I expect when all eight 128GB LRDIMMs run continuously at 2933 MT/s?

The kit operates at the standard 1.2 V DDR4 voltage with no heat spreaders; sustained load temperatures will depend on the server's airflow design and fan curves rather than the modules themselves.

Which existing memory types must not be mixed with these ECC load-reduced DIMMs?

The modules cannot be combined with unbuffered or standard ECC registered DIMMs; only identical load-reduced ECC DDR4 should share the same system.

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