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Green bare circuit board with black memory chips along both edges, gold contacts on bottom edge, no heat spreader

OWC

OWC 16GB DDR4 2133MHz PC4-17000 CL15 1.2V 288pin ECC Registered RDIMM memory upgrade

SKU CH-NTKD-4A569

ECC registered DDR4 RDIMM adds 16GB at 2133MHz CL15 for compatible Lenovo servers

  • Total capacity16 GB
  • Rated speedDDR4 2133 (PC4 17000)
  • CAS latencyCL15
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx4
  • ECC registered design protects data integrity in server workloads
  • 16GB capacity at DDR4 2133MHz expands memory for Lenovo System x3500 M5, x3550 M5, x3650 M5
  • CL15 latency at 1.2V delivers stable performance within JEDEC specifications
  • 2Rx4 288-pin RDIMM form factor fits registered DIMM slots only
  • Replaces Lenovo part numbers 46W0795, 46W0796, 4X70F28590, 4X70G78062, 95Y4821

Server ECC RDIMM for Lenovo M5 Systems

This OWC 16GB DDR4 registered DIMM is built for Lenovo System x3500 M5, x3550 M5 and x3650 M5 servers. It delivers 2133MHz speed at CL15 latency on a 1.2V supply with error-correcting code and registered buffering for data integrity.

Suited for server and workstation upgrades only

Buyers upgrading compatible Lenovo M5 servers or workstations can install this module to expand memory capacity. It will not function in standard desktop PCs, consumer laptops or NAS units that require unbuffered non-ECC memory, and it cannot be mixed with unbuffered modules.

Registered ECC with 2Rx4 organisation

The module uses a registered ECC design with dual-rank 2Rx4 architecture, a combination that the target Lenovo platforms require for correct operation. Systems expecting unbuffered or single-rank memory will not accept this part.

How it compares

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

Price $113.99
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 $7.12 per GB
Cheaper than about 57% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number2R1D42R416 GB
Total capacity16 GB
Product type288-Pin DDR4 ECC RDIMM
Performance
Rated speedDDR4 2133 (PC4 17000)
Memory
CAS latencyCL15
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.2 V
Compatibility
Compatible systemsLenovo System x3500 M5
Lenovo System x3550 M5 (5463)
Lenovo System x3650 M5 (5462)

Other versions of this model

5 more in the same range

Questions about this item

Will the 288-pin DDR4 ECC RDIMM fit my Lenovo System x3550 M5 (5463)?

Yes, the module is built for Lenovo System x3500 M5, x3550 M5 (5463) and x3650 M5 (5462) servers using 288-pin DDR4 ECC registered DIMM slots.

What is the correct way to install the 2Rx4 registered ECC module so the server recognises it?

Power down, open the chassis, align the notch on the 288-pin edge connector with the slot key, press firmly until both retention clips click, then power on and verify 16 GB appears in BIOS.

When should I plan to replace the 16 GB DDR4 2133 MHz CL15 RDIMM?

Replace if memory diagnostics report correctable or uncorrectable ECC errors, if the system fails to POST with the module seated, or when a capacity upgrade beyond 16 GB is required.

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