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Green rectangular DDR4 memory module with gold edge connectors and black chips on both sides

OWC

OWC 16GB DDR4 3200MHz ECC Registered RDIMM 2Rx8 CL22 1.2V 288-pin Dell PowerEdge

SKU CH-SCM9-E6W91

16GB DDR4 3200MHz ECC Registered RDIMM for Dell PowerEdge C6520, C6525, MX750c, R650 and R650xs servers

  • Total capacity16 GB
  • Rated speedDDR4 3200 (PC4 25600)
  • CAS latencyCL22
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8

Capacity 16GB

  • ECC registered design protects data integrity in Dell PowerEdge servers
  • 16GB DDR4 3200MHz CL22 module expands memory capacity for virtualization workloads
  • 2V operation reduces power draw in C6520, C6525, MX750c, R650, R650xs systems
  • 2Rx8 dual-rank layout increases bandwidth for multi-threaded applications
  • Replaces Dell part numbers AA783421, AA799064, AA810826, AB214251, M04W6, SNPM04W6C/16G, SNPM04W6C/16VXR

Compatible Dell PowerEdge servers

This 16GB DDR4 3200MHz ECC registered RDIMM is validated for Dell PowerEdge C6520, C6525, MX750c, R650 and R650xs systems. It replaces Dell part numbers AA783421, AA799064, AA810826, AB214251, M04W6, SNPM04W6C/16G and SNPM04W6C/16VXR. Buyers who need unbuffered memory for standard desktop computers cannot use this module.

Thermals noise and power

The module operates at 1.2V without a heat spreader, relying on the server chassis airflow for cooling. Registered ECC design adds minimal latency at CL22 while maintaining data integrity under continuous workloads. Power draw scales with capacity and rank configuration in the populated slots.

Registered ECC requirement

This memory is registered ECC DDR4 and will not function in platforms that require unbuffered non-ECC modules. It also cannot be mixed with unbuffered memory in the same system. Verify your server manual calls for registered ECC RDIMMs before purchase.

How it compares

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

Price $104.99
Cheaper than about 67% 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 $6.56 per GB
Cheaper than about 60% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameOWC
Part number3R2D42R816 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 3200 (PC4 25600)
Memory
CAS latencyCL22
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsDell PowerEdge C6520
Dell PowerEdge C6525
Dell PowerEdge MX750c
Dell PowerEdge R650
Dell PowerEdge R650xs

Other versions of this model

5 more in the same range

Questions about this item

How do I install the 288-pin DDR4 RDIMM in my Dell PowerEdge R650, and what step do people often miss?

Power down the server, open the chassis, align the notch on the 288-pin module with the slot key, press firmly until both retention clips click, then verify in BIOS that the 16GB module is detected at 3200MHz; the step often missed is ensuring all populated channels use identical 2Rx8 registered DIMMs.

What maintenance or replacement will this ECC registered memory need over time?

No routine maintenance is required; if a correctable error count rises or the module fails POST, replace it with another 16GB DDR4 3200MHz CL22 1.2V 2Rx8 RDIMM — mixing with unbuffered DIMMs is not supported.

What limit appears first when this RDIMM runs sustained workloads in a PowerEdge C6525?

The CAS latency of CL22 at 3200MHz sets the timing ceiling; sustained throughput is bounded by the DDR4 25600 transfer rate and the registered buffer, so latency-sensitive tasks hit the CL22 wall before bandwidth saturates.

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